A8N-SLI Premium & TWINX1024-4400C25

[Er1kTheRed]

I've got an A8N-SLI Premium with an Athlon64 X2 4400, and two pair of TWINX1024-4400C25 (listed on Corsair's web site as being compatible with A8N-SLI and A8N-SLI Deluxe - according to Asus they are identical from a memory standpoint). I can use two modules at a time - it doesn't matter which two. If I put in four modules, the system becomes extremely unstable; often it won't even post.

 

The A8N-SLI Premium (and A8N-SLI and A8N-SLI Deluxe) manuals state that double-sided, 16-chip modules are not compatible. Corsair claims the modules should work. Unfortunately, Corsair doesn't list the number of chips / sides used on the modules, which certainly doesn't help our purchasing efforts. Did Corsair actually slap four of these in a motherboard and qualify them?

 

What's the story?

[Wired]

Corsair only guarantees 1 TwinX pack, not 2 at the rated timings.

 

Could try 3-4-4-8 @ 2T. Doubt they'll OC nearly as well as they would with just one pair though. Too much stress on the memory controller.

[Er1kTheRed]

COrsair only guarantees 1 TwinX pack, not 2 at the rated timings.

 

Out of curiosity, do you speak officially for Corsair on this point?

 

Could try 3-4-4-8 @ 2T. Doubt they'll OC nearly as well as they would with just one pair though. Too much stress on the memory controller.

 

Didn't help much (I consistently get some text on the screen during post, in the default configuration it would not always get this far).

[Wired]

Out of curiosity, do you speak officially for Corsair on this point?

Nope, but Ram Guy (Corsair's official rep) has said it numerous times around the forums.

[RAM GUY]

Did Corsair actually slap four of these in a motherboard and qualify them?

A: No only one set of Twinx modules would be suggested. And with this MB if you install more than 2 modules you may be limited to DDR333. Sorry but this is a limitation in the memory controller in the CPU! As the MB matures I think you will see better bios support for these newer CPU’s but only the latest cores will support DDR400 with all four slots filled, but even AMD will suggest DDR333 with more than 2 ranks per channel even with a newer core CPU.

 

Unfortunately, Corsair doesn't list the number of chips / sides used on the modules,

A: I am sorry but yes we do publish this information on the product page and on the product data sheet. All of our XMS modules are made with By 8 memory IC's 32M x 64 to make a 512 Meg module, that's 2 ranks of 8 IC's. If the module had 16 IC's and was single rank that would be made with By 16 IC's and this would not be compatible with this platform.

There seems to be some miss interpretation of memory by MB makers when they print the manual, not that they are not accurate, but the terminology used may be from a different vantage and thus kind of confusing to someone that does not fully understand memory and or chipsets. Not to mention they are often converted from Chinese to Chinglish and then to English.

The Manual states " Due to CPU limitation, Dim Modules with 128 Mb memory chipset or double sided By 16 modules would not be supported.

Double sided By 16 IC's would be 32 Modules with By 16 IC’s; why anyone would use this is beyond me as there is not many MB's that would see that.

And at this time modules made with 128 M IC's would cost more than 4 times what lower density IC cost. I think this was just added for future reference as memory IC's start to come down in price.

[Wired]

Chinglish Example: All your base are belong to us :)