Solved 1/2 the ram showing up in system info

[drmax]

Mobo asus f1a75, cpu amd a8-3850, ram g-skill 2 x 4 gig ...2 sticks each, total 8 gig. Brand new build, freshly installed W7HP. Went into system display to ck the amount of ram showing, and shows total 4. Sticks inserted in blue slots, as suggested by manual of asus mobo. Why is it not showing 8 G?

 

[Dwarf]

Before we go any further, how much RAM is shown in the BIOS POST ?

 

[drmax]

Before we go any further, how much RAM is shown in the BIOS POST ?

it'll be a bit b-f i can ck. keyboard being used for another pc.

 

[Dwarf]

No problem. We'll wait for you. The reason I'm asking this is if the memory is not being detected by the BIOS, it's not going to be by the OS.

 

[dsperber]

Before we go any further, how much RAM is shown in the BIOS POST ?

it'll be a bit b-f i can ck. keyboard being used for another pc.

Also, when you do come back can you please post a screenshot of the lower part of the Resource Monitor -> Memory display?

Start -> Run -> TASKMGR -> Performance tab -> push RESOURCE MONITOR button at the bottom. This will open a second window for Resource Monitor.

Then push the Memory tab on the second Resource Monitor window, and at the bottom of the screen will appear the "Physical Memory" layout. That's what would be very helpful to see. If you need to move the horizontal separator between the upper "Processes" list and the lower "Physical Memory" graphic so that we can see the whole thing, please do.

It will look something like this:

Also, If you can download and install CPU-Z (download links on right side of that page), and post the screenshots of the following tabs: CPU, Mainboard, Memory, Graphics, and SPD (all that are populated, one screenshot for each of your slot#'s) that would also be extremely useful for us to help you explain what's going on.

 

[drmax]

Before we go any further, how much RAM is shown in the BIOS POST ?

in bios, total memory 4096 ddr3 1600 mhz and is pc3 12800

 

[stormy13]

Supports up to 64 GB,

ASUSTeK Computer Inc. - Motherboards- ASUS F1A75

Make sure that both sticks are seated properly in the slots and the locking levers are fully in.

 

[drmax]

Before we go any further, how much RAM is shown in the BIOS POST ?

it'll be a bit b-f i can ck. keyboard being used for another pc.

Also, when you do come back can you please post a screenshot of the lower part of the Resource Monitor -> Memory display?

Start -> Run -> TASKMGR -> Performance tab -> push RESOURCE MONITOR button at the bottom. This will open a second window for Resource Monitor.

Then push the Memory tab on the second Resource Monitor window, and at the bottom of the screen will appear the "Physical Memory" layout. That's what would be very helpful to see. If you need to move the horizontal separator between the upper "Processes" list and the lower "Physical Memory" graphic so that we can see the whole thing, please do.

It will look something like this:

Also, If you can download and install CPU-Z (download links on right side of that page), and post the screenshots of the following tabs: CPU, Mainboard, Memory, Graphics, and SPD (all that are populated, one screenshot for each of your slot#'s) that would also be extremely useful for us to help you explain what's going on.

say, this pc isn't even hooked up to the internet at the moment. i can only relay what info you're after. sorry

 

[drmax]

pull up the monitor under performance tab...4096 installed, 3333 available, 485 cached, 4072 total

 

[Dwarf]

Let me clarify this. You say that you have 4 x 2GB sticks of RAM installed, making 8GB, but the BIOS is only detecting ½ that amount, i.e. 4GB. Correct? What is the full part number of the RAM modules?

 

[dsperber]

say, this pc isn't even hooked up to the internet at the moment. i can only relay what info you're after. sorry

Fair enough.

And yet you have access to the internet from some other machine, to post here. Can you download CPU-Z using this machine, and then install it on the other machine, and run it as suggested?

If you only show 4GB out of the 8GB, the SPD tab from CPU-Z will show you each of the slots you have memory sticks installed in, and will show whether there is or is not any memory in that slot. This would be very revealing for diagnosis.

I know you have physically installed a 4GB stick in each of two slots, but we need to see what the hardware thinks is actually present in each slot, and that's exactly what the SPD tab shows from CPU-Z.

I wonder if the two sticks need to be installed in slots #1 and #3, rather than #1 and #2?

 

[drmax]

Let me clarify this. You say that you have 4 x 2GB sticks of RAM installed, making 8GB, but the BIOS is only detecting ½ that amount, i.e. 4GB. Correct? What is the full part number of the RAM modules?

no...2 x 4GB
0n the package...
F3-12800CL9D-8GBXL
DDR3-1600 PC3-12800
4096 x 2
CL9-9-924 1.5v

 

[drmax]

say, this pc isn't even hooked up to the internet at the moment. i can only relay what info you're after. sorry

Fair enough.

And yet you have access to the internet from some other machine, to post here. Can you download CPU-Z using this machine, and then install it on the other machine, and run it as suggested?

If you only show 4GB out of the 8GB, the SPD tab from CPU-Z will show you each of the slots you have memory sticks installed in, and will show whether there is or is not any memory in that slot. This would be very revealing for diagnosis.

I know you have physically installed a 4GB stick in each of two slots, but we need to see what the hardware thinks is actually present in each slot, and that's exactly what the SPD tab shows from CPU-Z.

I wonder if the two sticks need to be installed in slots #1 and #3, rather than #1 and #2?

I edited my 1st post as is confusing and I am sorry. 2 sticks...totaling 8 gig. i'll download program, xfer it to new pc. hold on

 

[Dwarf]

Thanks for the clarification. What do you get when you have a single stick installed? Try both sticks individually. It could be that one is bad.

 

[drmax]

additional info

the book reads...
"you may install varying memory sized in Cahnnel A and B. The system maps the total size of the lower-sized channel for the dual-channel configuration. ANy excess memory from the higher-sized channel in then mapped for single-channel operation."
also...
"We recommend that you install the momory modules from the blue slots for better overclocking capability"

Blue slots are listed as Dimm A1 Dimm B1, and black slots as Dimm A2 dimm B2

Currently installed into blue A1 & B1

 

[drmax]

Thanks for the clarification. What do you get when you have a single stick installed? Try both sticks individually. It could be that one is bad.

i think i'll try this 1st. thx for jogging my brain

 

[Dwarf]

Alternatively, it could be that one of the slots on the motherboard is faulty. When checking the RAM, I forgot to say to try each stick in each slot.

 

[dsperber]

I edited my 1st post as is confusing and I am sorry. 2 sticks...totaling 8 gig. i'll download program, xfer it to new pc. hold on

CPU-Z will provide the definitive answers to all the mysteries.

The MEMORY and SPD tabs will give specific answers to what is currently speculation.

Looking forward to the results.

 

[drmax]

slot 1 dead. used the recommended program at the end to verify. initially stuck one stick in slot 1, alone and pc would not boot. great...i stuck in slots 2 and 4 and all the ram shows up. guess i get to return mobo to newegg. good grief

 

[Dwarf]

I agree. Time to RMA the board. Hopefully, the replacement will work correctly. Let us know how you get on. I'll mark this Solved as you've found the source of the problem.