8GB Ram no detect in 32bit & in 64bit it not running in its full speed

ok it all start like this..

my board is GA-H61M-DS2 (rev. 4.0)

2 Hdd IN ONE I Have WIN 7 32BIT--- AND ON ANOTHER ONE I HAVE WIN 10 64bit



=============== Issue num 1- win7 32bit not detecting 8GB ram ==================

First, Info regarding memory Rams

i am using Corsair 4gb memory
Corsair Vengeance CMZ4GX3M1A1600C9 4GB Single Module DDR3 1600MHz
Computer Memory Type DDR3 SDRAM
Voltage 1.5 Volts
Memory Standard DDR3-1600/PC3-12800
Pins 240-pin
Buffered/Unbuffered Unbuffered
Memory Configuration: Single Module

-SPD Latency: 9-9-9-24; SPD Speed: 1600MHz; SPD Voltage: 1.5V, SPD Speed: 1333MHz
Frequency
1333 MHz (Specified), 1600 MHz (Test)




By default it runs in DRAM freq - 665mhz



after OC (Overclocking -XMP) corsair DRAM freq goes to - 798mhz

in this (XMP) change thru Bios - advanced memory settings, i notice little performance boost.


Now...
yesterday in another empty slot i inserted another DDR3 memory stick of kingston.. same size of 4gb.. same freq...

Memory: 4096 MBytes @ 798 MHz, 11-11-11-28
- 4096 MB PC12800 DDR3 SDRAM - Kingston 99P5474-013.A00LF
Maximum Clock Speed (MHz): 800 (JEDEC)
Maximum Transfer Speed (MHz): DDR3-1600
Maximum Bandwidth (MB/s): PC3-12800
Module Voltage: 1.5V
CAS Latencies Supported: 6 7 8 9 10 11
Timings @ Max Frequency (JEDEC): 11-11-11-28
Memory Capacity (MB): 4096




Now,, in win7 32bit it showing


Is this due to its limit of excepting only 4gb in 32bit verions ???? means if we install even 16gb (2x8) it will take 4gb only..in 32Bits !



========= Issue num 2 - win10 64bit not running rams in their full Mhz speed =========


in win10 64bit it was showing some 7.54gb usable... so its like it detecting 8gb

But one thing i notice that the rams are not running in 798Mhz DRAM Freq

if i use them separately one by one than they run in that 798mhz.. but when i use them together.. they fall back to 665mhz


An screenshot of kingston running alone - its DRAM speed also in that 798mhz (note it does not have any OC (XMP) option.. that 798 is its default speed ....wherz in corsair i have to OC (XMP) thru bios settings to make it 798mhz aka 1600mhz speed





Now see when i use both ram... its speed falls to Dram 665mhz aka 1333mhz






Why this happening ? even both ram are of same size & frequency !


is this due to some of its diff Timings/ Latencies.. just check below pic.. at 800 speed both have diff CL /CAS


9-9-9-24
11-11-11-28

but at 665or666 they matched 9-9-9-24 ... is this why both ram running in that matched speed..timings.. instead of 8000mhz freq

truemate said:

=============== Issue num 1- win7 32bit not detecting 8GB ram ==================

The Max amount of addressable RAM in Windows 7 (or 8) 32-bit is 4GB.

truemate said:

========= Issue num 2 - win10 64bit not running rams in their full Mhz speed =========

You would have to check your Motherboard manual and BIOS for further information.

It could be just simply that the RAM sticks occupy the wrong slots, for max. speed. Or it could be that the BIOS does not recognise the RAM profile, and has defaulted to loading a lower RAM speed.

^

truemate said:

...in win7 32bit it showing


Is this due to its limit of excepting only 4gb in 32bit verions ???? means if we install even 16gb (2x8) it will take 4gb only..in 32Bits !

Yes, for a 32 bit address the maximum RAM that can be addressed is 2^32 - that's FFFFFFFF(hex) or 4,294,967,296(dec.). There's your 4GB limit.

In practice the RAM useable by the OS is less than this because some of the address space is set aside for addressing the video RAM.

You are using different memory modules, that is why it works on 665MHz.
The Corsair is a DDR3 1333 that under XMP works as DDR3 1600.
The Kingston is a DDR3 1600.
When you mix the two, they work on the lowest rate (DDR3 1333 - 665MHz)

iko22 said:

You would have to check your Motherboard manual and BIOS for further information.

It could be just simply that the RAM sticks occupy the wrong slots, for max. speed. Or it could be that the BIOS does not recognise the RAM profile, and has defaulted to loading a lower RAM speed.

there no profile for kington.. it fixed with those speed... wherz in corsair we can change it

Bree said:

^
Yes, for a 32 bit address the maximum RAM that can be addressed is 2^32 - that's FFFFFFFF(hex) or 4,294,967,296(dec.). There's your 4GB limit.
In practice the RAM useable by the OS is less than this because some of the address space is set aside for addressing the video RAM.

yup....

townsbg said:

There is a workaround to the 3 gb limit on a 32-bit system but it can be extremely risky especially if you don't know what you are doing. Personally I haven't done it and I wouldn't do it however I am doing my due diligence by posting it. Unlock up to 64GB of RAM on 32-bit Windows With PAE Patch Another part of my due diligence is to say attempt at your own risk. If you read the comments you'll see that some people end up with stability issues. It would be safer to install 64 bit but that would require that you completely wipe Windows 7.

better safe and simple way to move it on 64bit

Megahertz07 said:

You are using different memory modules, that is why it works on 665MHz.
The Corsair is a DDR3 1333 that under XMP works as DDR3 1600.
The Kingston is a DDR3 1600.
When you mix the two, they work on the lowest rate (DDR3 1333 - 665MHz)

shiiit thats why memory configuration has changed to the lower speed ?

friend can Change RAM timings from 11-11-11-28 to 9-9-9-24





some thing can be done in those bios settings ?

truemate said:

there no profile for kington.. it fixed with those speed... wherz in corsair we can change it

Then you (or the memory controller) would change corsair to match kingston , and not the other way round.

iko22 said:

Then you (or the memory controller) would change corsair to match kingston , and not the other way round.

U mean to change timeing settings for corsair ?
Corsair XMP/profile option disappeared from bios settings when I attach both ram together.

And corsair alone runs in that DRAM 800mhz Freq in its max timing 9-9-9-24..