A8N SLI Premium - 2x1gb + 2x512?

[RafaelSmith]

Recently built myself a new system:

 

-Asus A8N-SLI Premium w/ AMD 64 4400+ X2 CPU.

-Corsair XMS 2048-1024 (2x1gb) C2PT 2.5-3-3-6 1T

 

I also have some XMS 1024-3200C2PT (2x512) that ide like to make use of.

 

Was wondering if it was possible to run both sets (for total of 3gb)?

 

System runs fine with either set but when I tried to put all 4 in it wouldnt even post...kept getting post error beep.

[Yellowbeard]

In most cases you cannot mix 2 different types of RAM like that. Most likely the sticks are made with different ICs and are not compatible. Also, you will be adding extra load to the memory controller and will slow the system to 2T command rate. Many users are saying that the extra RAM gained by using 4 sticks on an A64 platform is not worth the performance loss.

 

You "might" be able to run the RAM however as there is no way to tell but to test. You could try manually setting the timings to 2.5,3,3,11, command rate to 2T, and RAM voltage to 2.8v.

 

Mike.

[Mausi]

Hello,

I'm new in this forum and I found this thread for my question:

I'm using the A8N SLI Premium with a 4400X2 and I would like to buy new RAMs and upgrade to 3gb since I am using WinXP32.

 

For now I am using 2x1GB in dual channel 3-3-3-8 1T

 

I would like to know if it is possible to upgrade to 3gb with new rams using dual channel, 1T and better latency (i would like to have 2-3-3-8 1T)

 

is it possible to use:

TWINX1024-3200C2 (2x512) and TWINX2048-3200C2 (2x1024) in dual channal and 1T?

i saw that the 1024 modules run with 2-3-3-8 and the 512 modules run with 2-3-3-6 and i thought i can manually change the settings in bios to: 2-3-3-8?

or maybe other configuration?

 

thx and regards

[Yellowbeard]

is it possible to use:

TWINX1024-3200C2 (2x512) and TWINX2048-3200C2 (2x1024) in dual channal and 1T?

i saw that the 1024 modules run with 2-3-3-8 and the 512 modules run with 2-3-3-6 and i thought i can manually change the settings in bios to: 2-3-3-8?

or maybe other configuration?

 

thx and regards

Most likely no, you will not be able to run 1T at all with 4 DIMMs. Also, if you decide to use 4 DIMMs you should NEVER mix different ICs. The 2 types of memory (TWINX1024-3200C2 (2x512) and TWINX2048-3200C2 (2x1024)) are made with different ICs so you could get stability issues and possibly not even be able to boot.

 

Mike.

[Mausi]

thx mike,

 

so, is there another possibility to get more ram and get the 1T?

 

kind regards

[Yellowbeard]

Not that I know of. The boards/bios etc will force 2T when you have 4 DIMM slots populated regardless of the RAM density. To get more than 2gb at 1T, you'd need 2 x 2gb DIMMs and I have not seen those yet.

 

I've done some testing with 4 DIMMs vs 2 DIMMs and 1T vs 2T. IMO, the only real difference between the 1T vs 2T is in memory benchmarks. I saw no difference in actual game play or in gaming/video benchmarks. However, you still come back to the issue of mixing ICs. If you add 2 DIMMs, you should add the EXACT same memory of the same revision so you can guarantee it to have the same ICs.

 

Mike.

[Mausi]

ok, maybe i decide to cancel the 1T.

what possibilities do I have to install 3gb? or more that 2gb? are there any other models where i can use 2x512 and 2x1024? or is it better to take 4x1024, even if the system doesnt allocate the whole amount?

 

the other possibility (even more cheap) is to get quite fast 2gb, i think (if no other idea comes) that i will do that.

 

what about the twinx2048-3500LL?