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ASUS A7M266, Corsair PC2400 DDR and low Sandra scores

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New Member
May 18, 2001
I just built a new machine (details below) on a ASUS A7M266 with 512MB of
crucial PC2100 CL2.5 DDR. I was able to get my system stable at 1400mhz and
run quake3 overnight without crashing.

I registered Sisoft Sandra Pro (version 2001.3.7.52) and ran all the
benchmarks. I was happy with all results *except* the memory benchmark.

I get:

INT ALU/RAM Bandwidth 489 MB/S
Float FPU/RAM Bandwidth 621 MB/S

The reference AMD 760 PC2100 CL2.5 DDR (K7) gets:

INT ALU/RAM Bandwidth 537 MB/S
Float FPU/RAM Bandwidth 700 MB/S

I assumed this was just cheap Crucial ram not being up-to-snuff. Later I
orderd 2 sticks of Corsair CM64SD256-2400C2 (PC2400, CAS2 XMS2400) and
replaced the Crucial sticks. Although I can happily run at 1450mhz now and
reliably set to 2-2-2, my Sisoft Sandra scores are exactly the same.

Any ideas? This is really puzzling, I would expect to get at least the
reference scores on the MB many claim to be the fastest out there, using the
fastest DDR available. Ideas?

Windows ME
AMD T-Bird 1.333 @ 1.49
Corsair PC2400 CAS2 - 512MB
ASUS A7m266 - bios 1004a266f - all jumpers default
6 System Fans
nVidia stock GeForce 2 Ultra 64 Meg
SBLive 5.1 Soundcard
Plextor Plexwriter 16/10/40
Toshiba PC-DVD 48x CDRom 16x DVD
Cambridge Soundworks Desktop Theatre 3500 5.1
Enermax 350 Watt PSU
IIyama Vision Master Pro 510 22' Monitor
GlobalWin fan
Artic Silver Cooling
Lian Li PC-60 All Aluminum Case
3Com Ethernet 100 3com NIC
Logitech Infrared/wireless mouse
1 75 gig 7200 RPM IBM Desktar


Mar 12, 2001
at what speed do you ran your RAM ??? also how much did you pay for 1/2 gig of PC2400 .

If you overclock your ram you will get higher scores


I had the same problem and this is what I came accross. There is a file named ndis.vxd that is a virtual driver for the network. When I ran sisoft with this I got scores the same as yours or maybe even a little less. You can disable this driver from loading in Windows ME/98 if you run msconfig. Once I disabled this my scores were 630/810, before they were 426/578. Try this and let me know.



What affect does getting rid of that vxd have on your network? On the A7M266 try upping the voltage on VIO1 to the max. I hear if you do that and run in Turbo Mode you can see a difference. I don't know, I got my tbird up to 1570 and cracked it so I'm taking a break from the oc'ing arena with my axia y until i get some liquid cooling. Anyways, I'd love to know what delelting or disabling that ndis.vxd would have on the lan etc..


New Member
May 29, 2001
Hi Thor.
I'm running a A7A266 with a 1.2 Athlon @ 157 FSB and my Sisoft scores should be higher too. They're only 578/750 at cas2.
Icouldnt find where to disable the vxd file you mention in msconfig.
Could you explain how to do it please.


New Member
May 29, 2001
[Could you please explain how I can disable the VXD driver you mentioned to get better Sisoft scores.?
I cant find it in msconfig but know that my memscores should be higher.
Rodders (-: