More memory = SLOWER?!?!

[WaOnFiRe]

Hello all,

I have a problem with someone's else PC. He have an ASUS K8N motherboard, 1536Mb DDR400 (3 DIMM), AMD Athlon 64 3500+ CPU... He find his computer to be slow. So he tested it with a benchmark program called TestLab.

Here's the pic of the results:

512Mb = 115 score
1024 = 97
1536 = 42.

So he was right, what's the problem you think? It's all DDR400 memory but not the same brand. When he test them each one individually, he get the same 115 score. It's when he begin to add more RAM that it slow down. He updated to the latest BIOS (1010) and ti didn't helped.

I don't know what to tell him.

 

[mpjesse]

Please break down how many DIMM's he is using for 512MB and 1GB.

I can explain the 1.5GB score. The problem is he's using 3 DIMMs. When you have an odd number of DIMMs in a dual channel board, none of the DIMMs will run in dual channel. This is the reason the score is lower compared to 1GB (assuming of course he's using 2 DIMMs for 1GB).

As for the difference in 512MB and 1GB scores I have no clue. If he's using 2 DIMMs for 1GB- the score should be better than a single 512MB DIMM. But again I don't know if he using the same speed DIMMs, pairs, etc.

So please give us that info.

-mpjesse

 

[pat]

I hope you won't be crossposting all around the place ..

 

[mpjesse]

LOL. Too late.