Only 8 GB Ram recognised of 12 GB

[alphanumeric]

Under clocking is running your RAM or processor at a lower speed/clock frequency than its rated for. If you had RAM modules rated for different speeds the faster RAM would run at the speed of the slower RAM. The motherboard sets the speed of all the RAM modules to that of the slowest stick. It reads the speed and latency from the SPD file on the RAM and adjusts things accordingly. You can override that by setting your clock speed and latency's manually in the BIOS.

 

[Wordsworth]

Thanks for the anwsers.
I dont thing that the sticks are bad because CPUZ recognises all six slots with all six sticks. And besides, this problem is new... just a couple of days ago all 12 GB ram were showing in windows and in Bios...

The only thing that might make sense is the bent CPU sockel pin, because some days ago I installed a new cpu cooler and I removed the CPU to remove all of the Thermal compund from the cooler before. So im guessing its possible that I bent a CPU sockel pin during that process. I think it is worth a look. And if thats the case, is there a way to bend it back?

I dont undestand anything about underclocking or anything related to that topic...

all the sticks are the same model but what does P/N mean, and were do I find that information?

I put in bold in your post what is probably important here. Since the memory controller is on the CPU if the CPU is not seated properly you can have your situation occur (some memory not showing). Remove the CPU again and make certain it seats properly (blocks in motherboard socket align with cutouts in CPU, CPU is laid flat when placed in socket, some pressure on the lever to close) and your problem may be solved.

You don't have to remove the CPU to clean old thermal paste. Keeping the alcohol bottle well away from the motherboard and careful application of the alcohol with a Q-Tip is all that's required.

 

[Hopalong X]

PassMark RAMMon - Identify RAM type, speed & memory timings

Download and install this program. It is FREE software.
It will show timing and voltages for all sticks and what slot is occupied.
On the right side of the page it lists a 32bit and 64bit.
I don't know which version of win Ultimate you have since it is not in your specs.
Choose the appropriate version.
Ignore the cart button.

After opening Rammon make a Snip of the page and post for us to see.
Mike

 

[GeneO]

What exactly do you mean when you say "windows shows only 8GB"? Where exactly do you see this? It is best to get this information from the resource monitor memory tab

What RAM frequency does CPU-Z show?

Try reducing the RAM speed in BIOS as alpha suggested to see if it helps.

 

[Danii]

Okay I understand. once I have time again Im going to open my Pc and check if the CPU is seated properly.

meanwhile, heres what rammon reports:

RAMMon v1.0 Build: 1002 built with SysInfo v1.0 Build: 1006
PassMark (R) Software
www.passmark.com

Memmory summary for ASUSCOMPUTER:
Number of Memory Devices: 6    Total Physical Memory: 8183 MB (12288 MB)
                Total Available Physical Memory: 5832 MB
                Memory Load: 28%    

Item                                                                           | Slot #1                | Slot #2                | Slot #3                | Slot #4                | Slot #5                | Slot #6                | 
-------------------------------------------------------------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|------------------------|-
Ram Type                                                                       | DDR3                   | DDR3                   | DDR3                   | DDR3                   | DDR3                   | DDR3                   | 
       Standard Name                                                           | DDR3-1333              | DDR3-1333              | DDR3-1333              | DDR3-1333              | DDR3-1333              | DDR3-1333              | 
       Module Name                                                             | PC3-10600              | PC3-10600              | PC3-10600              | PC3-10600              | PC3-10600              | PC3-10600              | 
Memory Capacity (MB)                                                           | 2048                   | 2048                   | 2048                   | 2048                   | 2048                   | 2048                   | 
Bus Clockspeed (Mhz)                                                           | 666.67                 | 666.67                 | 666.67                 | 666.67                 | 666.67                 | 666.67                 | 
Jedec Manufacture Name                                                         | Kingston               | Kingston               | Kingston               | Kingston               | Kingston               | Kingston               | 
Search Amazon.com                                                              | Search!                | Search!                | Search!                | Search!                | Search!                | Search!                | 
SPD Revision                                                                   | 1.0                    | 1.0                    | 1.0                    | 1.0                    | 1.0                    | 1.0                    | 
Registered                                                                     | No                     | No                     | No                     | No                     | No                     | No                     | 
ECC                                                                            | No                     | No                     | No                     | No                     | No                     | No                     | 
DIMM Slot #                                                                    | 1                      | 2                      | 3                      | 4                      | 5                      | 6                      | 
Manufactured                                                                   | Week 44 of Year 2009   | Week 42 of Year 2010   | Week 42 of Year 2010   | Week 46 of Year 2009   | Week 42 of Year 2010   | Week 44 of Year 2009   | 
Module Part #                                                                  | 99U5403-002.A00LF      | 99U5471-002.A00LF      | 99U5471-002.A00LF      | 99U5403-002.A00LF      | 99U5471-002.A00LF      | 99U5403-002.A00LF      | 
Module Revision                                                                | 0x0                    | 0x0                    | 0x0                    | 0x0                    | 0x0                    | 0x0                    | 
Module Serial #                                                                | 0x52CCD162             | 0x762AFD21             | 0x772AE821             | 0x11E34E2              | 0x7629575A             | 0x53CCF062             | 
Module Manufacturing Location                                                  | 4                      | 7                      | 7                      | 5                      | 7                      | 4                      | 
# of Row Addressing Bits                                                       | 14                     | 14                     | 14                     | 14                     | 14                     | 14                     | 
# of Column Addressing Bits                                                    | 10                     | 10                     | 10                     | 10                     | 10                     | 10                     | 
# of Banks                                                                     | 8                      | 8                      | 8                      | 8                      | 8                      | 8                      | 
# of Ranks                                                                     | 2                      | 2                      | 2                      | 2                      | 2                      | 2                      | 
Device Width in Bits                                                           | 8                      | 8                      | 8                      | 8                      | 8                      | 8                      | 
Bus Width in Bits                                                              | 64                     | 64                     | 64                     | 64                     | 64                     | 64                     | 
Module Voltage                                                                 | 1.5V                   | 1.5V                   | 1.5V                   | 1.5V                   | 1.5V                   | 1.5V                   | 
CAS Latencies Supported                                                        | 6 7 8 9                | 6 7 8 9                | 6 7 8 9                | 6 7 8 9                | 6 7 8 9                | 6 7 8 9                | 
Timings @ Max Frequency                                                        | 9-9-9-24               | 9-9-9-24               | 9-9-9-24               | 9-9-9-24               | 9-9-9-24               | 9-9-9-24               | 
       Minimum Clock Cycle Time, tCK (ns)                                      | 1.500                  | 1.500                  | 1.500                  | 1.500                  | 1.500                  | 1.500                  | 
       Minimum CAS Latency Time, tAA (ns)                                      | 13.125                 | 13.125                 | 13.125                 | 13.125                 | 13.125                 | 13.125                 | 
       Minimum RAS to CAS Delay, tRCD (ns)                                     | 13.125                 | 13.125                 | 13.125                 | 13.125                 | 13.125                 | 13.125                 | 
       Minimum Row Precharge Time, tRP (ns)                                    | 13.125                 | 13.125                 | 13.125                 | 13.125                 | 13.125                 | 13.125                 | 
       Minimum Active to Precharge Time, tRAS (ns)                             | 36.000                 | 36.000                 | 36.000                 | 36.000                 | 36.000                 | 36.000                 | 
       Minimum Row Active to Row Active Delay, tRRD (ns)                       | 6.000                  | 6.000                  | 6.000                  | 6.000                  | 6.000                  | 6.000                  | 
       Minimum Auto-Refresh to Active/Auto-Refresh Time, tRC (ns)              | 49.125                 | 49.125                 | 49.125                 | 49.125                 | 49.125                 | 49.125                 | 
       Minimum Auto-Refresh to Active/Auto-Refresh Command Period, tRFC (ns)   | 110.000                | 110.000                | 110.000                | 110.000                | 110.000                | 110.000                | 
                                                                               |                        |                        |                        |                        |                        |                        | 
DDR3 Specific SPD Attributes                                                   |                        |                        |                        |                        |                        |                        | 
       Write Recovery Time, tWR (ns)                                           | 15.000                 | 15.000                 | 15.000                 | 15.000                 | 15.000                 | 15.000                 | 
       Internal Write to Read Command Delay, tWTR (ns)                         | 7.500                  | 7.500                  | 7.500                  | 7.500                  | 7.500                  | 7.500                  | 
       Internal Read to Precharge Command Delay, tRTP (ns)                     | 7.500                  | 7.500                  | 7.500                  | 7.500                  | 7.500                  | 7.500                  | 
       Minimum Four Activate Window Delay, tFAW (ns)                           | 30.000                 | 30.000                 | 30.000                 | 30.000                 | 30.000                 | 30.000                 | 
       RZQ / 6 Supported                                                       | Yes                    | Yes                    | Yes                    | Yes                    | Yes                    | Yes                    | 
       RZQ / 7 Supported                                                       | Yes                    | Yes                    | Yes                    | Yes                    | Yes                    | Yes                    | 
       DLL-Off Mode Supported                                                  | Yes                    | Yes                    | Yes                    | Yes                    | Yes                    | Yes                    | 
       Maximum Operating Temperature (C)                                       | 95                     | 95                     | 95                     | 95                     | 95                     | 95                     | 
       Refresh Rate at Extended Operating Temperature Range                    | 1X                     | 1X                     | 1X                     | 1X                     | 1X                     | 1X                     | 
       Auto-self Refresh Supported                                             | No                     | Yes                    | Yes                    | No                     | Yes                    | No                     | 
       On-die Thermal Sensor Readout Supported                                 | No                     | No                     | No                     | No                     | No                     | No                     | 
       Partial Array Self Refresh Supported                                    | Yes                    | No                     | No                     | Yes                    | No                     | Yes                    | 
       Thermal Sensor Present                                                  | No                     | No                     | No                     | No                     | No                     | No                     | 
       Non-standard SDRAM Type                                                 | Standard Monolithic    | Standard Monolithic    | Standard Monolithic    | Standard Monolithic    | Standard Monolithic    | Standard Monolithic    | 
       Module Type                                                             | UDIMM                  | UDIMM                  | UDIMM                  | UDIMM                  | UDIMM                  | UDIMM                  | 
       Module Height (mm)                                                      | 30                     | 19                     | 19                     | 30                     | 19                     | 30                     | 
       Module Thickness (front), (mm)                                          | 2                      | 2                      | 2                      | 2                      | 2                      | 2                      | 
       Module Thickness (back), (mm)                                           | 2                      | 2                      | 2                      | 2                      | 2                      | 2                      | 
       Module Width (mm)                                                       | 133.5                  | 133.5                  | 133.5                  | 133.5                  | 133.5                  | 133.5                  | 
       Reference Raw Card Used                                                 | Raw Card B Rev. 0      | Raw Card H Rev. 0      | Raw Card H Rev. 0      | Raw Card B Rev. 0      | Raw Card H Rev. 0      | Raw Card B Rev. 0      | 
       DRAM Manufacture ID                                                     | 0                      | 0                      | 0                      | 0                      | 0                      | 0                      | 
       # of DRAM Rows                                                          | 0                      | 0                      | 0                      | 0                      | 0                      | 0                      | 
       # of Registers                                                          | 0                      | 0                      | 0                      | 0                      | 0                      | 0                      | 
       Register Manufacturer                                                   |                        |                        |                        |                        |                        |                        | 
       Register Type                                                           |                        |                        |                        |                        |                        |                        | 
       Register Revision                                                       | 0                      | 0                      | 0                      | 0                      | 0                      | 0                      |

 

[Hopalong X]

Post up a Snip of the open window of RamMon as below or a screen shot when it is full size.

mike

 

[Danii]

okay, my screen isnt that big so I did it in two sides:

 

[GeneO]

There are no obvious differences that would indicate imcompatibility between the RAM (half are a different data and rev, but you are seeing more - 8/12).

I would shut off your computer, disconnect the power, make sure I am grounded to the case, and try reseating the memory. ASUS MB are finicky about how the memory cards are seated.

 

[Solarstarshines]

Thanks for the anwsers.
I dont thing that the sticks are bad because CPUZ recognises all six slots with all six sticks. And besides, this problem is new... just a couple of days ago all 12 GB ram were showing in windows and in Bios...

The only thing that might make sense is the bent CPU sockel pin, because some days ago I installed a new cpu cooler and I removed the CPU to remove all of the Thermal compund from the cooler before. So im guessing its possible that I bent a CPU sockel pin during that process. I think it is worth a look. And if thats the case, is there a way to bend it back?

I dont undestand anything about underclocking or anything related to that topic...

all the sticks are the same model but what does P/N mean, and were do I find that information?

If you had bent any of the pins you wouldn't boot at all, let alone be able to reconize anything.

Now if you talking the chip might have gotten damage when doing the above or heat done something to it from not being properly seated i could see a problem .

I almost sure if you know how to take the chip off install a cooler etc and was really carefull i doubt that would happen ,and this comes from a wreckless person when it comes to taking precautions

 

[yowanvista]

Did you update your BIOS?

 

[Danii]

My Bios has the newest version which is 0908.

 

[profdlp]

...The only thing that might make sense is the bent CPU sockel pin, because some days ago I installed a new cpu cooler and I removed the CPU to remove all of the Thermal compund from the cooler before. So im guessing its possible that I bent a CPU sockel pin during that process. I think it is worth a look. And if thats the case, is there a way to bend it back?...

I'd have a look. Unless your vision is fantastic you might need a magnifying glass. If my memory is correct (there's a joke in there somewhere...) the memory controller is in one of the corners. When I bought a new CPU cooler ( Prolimatech Megahalems ) I checked online before installing it just to see if there were any tips. One thing constantly mentioned was to be careful tightening down the cooler. The Socket 1366 pins are very fragile and a lot of people found that cranking the screws all the way down caused just the problem you are seeing. This was due to the cooler putting undue pressure on one side causing the other side to lift up ever so slightly and not make firm contact with the pin on the opposite corner. The recommended fix was to back off the tension the slightest little bit. I would try this first, since messing with the pins themselves is about as easy as brain surgery.

If one is bent, you could try to straighten it. There is a high risk that you'll only end up bending even more pins if you're not extremely careful.

Just (another) word of caution regarding ASUS' RMA policy: ASUSTeK Computer Inc.-Forum- 1366 Socket pins

...If you had bent any of the pins you wouldn't boot at all, let alone be able to reconize anything...

Not true.

Different pins do different things. There was one CPU years ago which could be unlocked by shorting two pins together. I think there was another one that could be unlocked by removing a pin. Not my idea of a fun time, though. :sarc:

 

[Wordsworth]

Danii, Profdlp's post reminded me of another tip you may want to know. I see you have the Noctua NH-D14. When you reinstall that cooler turn one screw on the cooler a quarter to a half turn, then do the same to the other screw, but don't tighten down one screw all the way then the other.

Hope all the info everyone has given you will help you resolve this issue.

 

[Danii]

okay thank you all very much, I will try all of your tipps this weekend since I don't have time to do such a operation in the week because I have to work. Once I have the results I'll report back here.

Thank you all very much again

 

[MesA]

Don't worry about bent pins etc. This is an issue with our Mobo. I also have the same issue as you and I'm pretty furious. If you do a search for P6T only showing 8GB of RAM you will find a ton of threads. Personally I find it unacceptable since this means this board is only able to host a baby system.

 

[Wordsworth]

Mesa, I have a P6T and have upgraded the memory first from 3GB to 6, then 6 to 12. No problems. Go to Newegg and look up the Gigabyte GA-X58A-UD3R motherboard reviews, another very popular board. There you find some who have the missing memory problem, the vast majority do not. Same with the Asus P6T. This can be a problem with the X58 boards and the reasons can vary. Take a look at this page.

I hope the suggestions in this thread lead you to a resolution of your problem. I would first check the CPU and cooler mounting.

We who like to build our own systems must accept the fact that problems can arise.

 

[profdlp]

...Take a look at this page...

Danii, the suggestions Wordsworth linked to here are definitely worth a look.

 

[smarteyeball]

I would first check the CPU and cooler mounting.

Definitely. Since it's only a recent occurrence and you haven't been playing with the RAM settings.

I've also had the same issue in the past (showing 4GB out of 6GB) and have the same cooler. In my case, it was the cooler tension that needed a minute adjustment.

As already mentioned, it's very common with X58 with a wide range of possible causes.

 

[Danii]

It got worse, now its only showing 2 GB out of 12 GB.
This is what I did:
1.checked cooler tension = nothing changed.
2.Removed cooler, checkt CPU, reseated Memory = showing only 4 out of 12.

what could be causing this? and above all, how can I fix this?

 

[alphanumeric]

Are you taking precautions against electrostatic discharge? Just one little static discharge can do big time damage to electronic components. It could be that your motherboard is damaged/failing.