A8N-SLI Deluxe and Corsair XMS OC-RAM

[Endurance]

Hello everyone here,

 

I need to know if Corsair XMS memory (especially DDR500) is compatible to the above mentioned board (Asus A8N-SLI Deluxe). It's not listed on Asus' QVL. If anyone knows anything I'd like to hear from you.

 

CU Endurance

[borismue]

I have the same Problem.

 

I want to insert 2 GB dual chanel RAM (4* 512) using

TWINX1024-4400C25 / DDR-550 (XMS-4400) / 2.5-4-4-8

or

TWINX1024-3200XL / DDR-400 (PC-3200) / 2-2-2-5

into my ASUS A8N-SLI Deluxe with FX55 CPU.

 

On the corsair website they say its compatible.

But I am not so sure if this information is compleate accurate, since they list allmost everything as compatible while ASUS excludes almost everything.:confused:

Also acording to ASUS some RAM is only compatible when only 1 or 2 dimms are inserted but not if 4 dimms are inserted; corsair does not mention up to how many dimms their RAM is compatible.

are these XMS single or double sided? I could not find this information on the datasheet.

since double sided memory is not compatible according to the manual??

but in the same manual they declare some double sided kingston ram as compatible. thats wired and confusing.

 

I would be happy if someone from corsair could confirm if above mentioned memory is compatible (I mean compatible while 4 dimms are inserted for dual chanell mode)

[Wired]

Endurance:

 

Recommended Modules for the Asus A8N-SLI Deluxe

 

[Excerpt] DDR 500:

 

(All have timings of 3-4-4-8)

 

CMX256A-4000(PT)

CMX512-4000(PT)

CMX512-4000PRO

TWINX1024-4000(PT)

TWINX1024-4000PRO

TWINX512-4000(PT)

 

Note: TwinX512 is a 512MB Kit (2 x 256MB)

Note: TwinX1024 is a 1GB Kit (2 x 512MB)

 

=======================================================

 

borismue:

 

Asus is only listing memory they have specifically tested or had a testing company do. Corsair is listing all compatible modules by specifications. As for how many sticks are compatible, it's all because of the memory controller on the CPU itself, go with the Asus specs. They're probably basing it on Dual Sided / Single Sided specs as well as the A64's memory controller specs. It has to be able to handle dual sided memory.

 

Most 512 MB sticks are Dual sided. I'm pretty sure the sticks you are looking at are dual sided. Running an A64 system with 4 sticks will have to lower the FSB to 333 Mhz I believe. May run better with 2 x 1 GB sticks @ 400 Mhz at looser timings.

[Endurance]

Thanks alot wired :thumbsup

 

MY only problem was the QVL of Asus nit listing that type of memory. I wrote a few lines to their support teams and thy told me that no type of RAM will be tested which is specified for frequencies that don't match Jedec.

 

Additionaly they wrote that they do not want to advertise a product because it's running well out of spec, but for it's stability.

 

That seems to be logical.

 

Concerning this I do know now, why that memory is listed compatible on Corsair-website.

 

Thanks alot again

 

Endurance

[Wired]

The Corsair site lists all memory compatible with the specs of the board, including for possible overclocked systems. Asus will only list memory that's tested at 400 Mhz and within JEDEC specs. They, like Corsair, know that their respective products have the potential to overclock, but because they only guarantee their respective products to run within certain specs, they can't test out of spec scenarios, at least not officially.

 

Also, if they're testing through a 3rd party testing company (which I think they may do), that company may only test with memory from companies that pay for that test to be run. If a company has not paid to have their memory included, it won't be tested. Doesn't mean it's not compatible, just that it hasn't been officially tested as such.

[borismue]

RAMGUY why dont you answer my question :(: :(: :(: :(:

 

Wireded comments are wrong.

First ASUS does suggest G.E.I.L. DDR-550 (Ultra Platinum Series) Memory for Overclocking. So the statement that ASUS does not test Memory above DDR400 is wrong.

 

Second acording to ASUS some RAM is only compatible when 4 DIMMs are inserted but not when 2 DIMMS are inserted, while others are only compatible when 2 are inserted but not if 4.

So it is essential to know in which quantity the selected RAM is compatible, and this information is missing on the corsair website.

 

RAMGUY:

Is

TWINX1024-4400C25 / DDR-550 (XMS-4400) / 2.5-4-4-8

or

TWINX1024-3200XL / DDR-400 (PC-3200) / 2-2-2-5

compatible with ASUS A8N-SLI Deluxe WHEN 4 DIMMS are inserted??

[RAM GUY]

First thing, both Twinx1024-3200XL and Twinx1024-4400C25 are compatible with this MB, and ASUS does not test or evaluate the MB's with an over clocked setting. All of their qualification is done with default settings as far as they have told us. In addition, I would not suggest more then 2 modules in any MB if you plan on over clocking, because of loading on the memory controller. In addition, this MB is too new and I have no data on how well this MB will over clock, so at worst until the MB matures you may not be able to reach the tested settings we use for XMS4400C25. Please see XMS Qualification and Testing for the modules you have and the make and model of MB we use and the bios settings used to test the modules.

[borismue]

Thanks for your reply !!!

 

Well when ASUS tells the customers to use GEIL DDR550 for overclocking, I am sure that they tested it before. Would be a little redicioulous if they suggest something which they never tested.

But in my country GEIL is not available, so this is out of intrest.

 

Thanks for the informatife news regarding overclocking.

OK, since overclocking with so much RAM is bad, I wont overclock the RAM.

So now only Twinx1024-3200XL is left (4 DIMMS).

Or do you like Wired suggest me to use two 1GB DIMMS like TWINX2048-3200C2 instead?

Don't the TWINX2048-3200C2 have 128MB chips on it?

In the ASUS Manual it is expressly written, that RAM with 128MB chips on it are not compatible with this board!

 

You do your testing mostly on Intel envoirment only?

So you want to tell me that I wont be able to reach the 2-2-2-5 timings when i take the Twinx1024-3200XL on this board?

 

Thanks again for your help.

regards

boris

[RAM GUY]

Boris,

ASUS is a Taiwanese manufacture and Taiwan manufacturers have at least displayed favoritism in the past for other Taiwan manufacturers. I think it's more of a culture thing, at least from my experience with Taiwan companies. So I don’t put a lot of weight in a statement like that. As I remember they suggested only one PSU for the A7M266-D when it was released and it was only available in Taiwan. So I would take things like that with a grain of salt. And consider the source.

 

In addition, all of our XMS modules are tested on a MB at the rated speed before they leave our factory and to my knowledge we are the only memory manufacturer that does that 100% with our XMS line of modules.

[Wired]

First ASUS does suggest G.E.I.L. DDR-550 (Ultra Platinum Series) Memory for Overclocking. So the statement that ASUS does not test Memory above DDR400 is wrong.

 

Second acording to ASUS some RAM is only compatible when 4 DIMMs are inserted but not when 2 DIMMS are inserted, while others are only compatible when 2 are inserted but not if 4.

 

Meh, meant tested at 400 Mhz, corrected that post. The Qualified Vendors List for that board doesn't list GEIL at all. Where did you get that information?

 

Can't think of a reason why some memory is compatible when in quad, and not in pairs, and vice versa, doesn't make a lot of sense.

 

TwinX1024-3200XL are guaranteed to hit 2-2-2-5 with one pack (2 sticks), but not when 2 TwinX packs (4 sticks) are used.

 

Also, they may recommend it, but that doesn't mean they guarantee the board will OC that high, nor have they necessarily tested it at that speed (although there's probably some Asus employee geek who has).