Switch to sis645 from msi i845 board....

Duvie

Elite Member
Feb 5, 2001
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just finished my update to asus p4s333 board: no pics yet...but here are some scores

1.8a@2.4ghz with 133fsb and 4:5ratio for memory w/ pc2700 modules so it should be 333mhz

sandra alu/fpu: 4658/2956
multimedia: 9540/11641
memory : 2526/2525

1.62-1.64v
Prime95 all night

1.8a@2.45ghz w/ 136fsb...ratio is 1:1...haven't upgraded bios yet to new 4:5 ratio above 133fsb

sandra alu/fpu: 4720/3015
multimedia: 9727/11866
memory: 2045/2045

1.625v set failed prime 1.65v ran steady for a few hours...haven't fully tested it

I tried 1.8a@2.5ghz w/139fsb ran no scores though

prime failed immediately at 1.65v
I bumped it to 1.675v and it was steady for 1 hour (before I stopped it), but I think I want to be sub 1.65v until I hear otherwise...


Heat doesn't seen to be issue as I have new avc hsf and as2, and my idle temps were at 38c in bios...asus probe never took me over 47c at 1.675v so I don't know if that sounds right...maybe???

I need a 3:4 ratio for 133 or over...I think scores would be 7 percent better and near 2700....


Versus the msi board...I get a bit higher with the asus as the board (msi ultra aru) was maxed out on voltage and would fail prime 95 in seconds at 136fsb. This was clearly not ram as it had tested much higher in freq. on board at 122fsb, and the temps were fine at start of prime test...I had restart problems and I hadn't done the wire trick....

Also it would switch to a 1;1 ratio after 122 or 125fsb and kill any chances of getting decent memory scores and raw cpu power...I would get about ~2000/~2000 regardless of settings at 133fsb for 2.4ghz...But it ran prime95 solid at 2.4ghz

Overall good features with the msi, but lackluster ocing capabilitites and limited confidence in bios fixes for the matters above...some have stated maybe a chipset limitation, but I don't know if I believe that...


Asus:
pro:
I saved about 20bucks
got 25percent higher bandwidth scores...Now above a non-oced i850
better ocing features in bios
bundled programs that actually work!!! well maybe not the temps on asus probe...don't know for sure...

cons:
I lost ata133 feature, though many say high overclocks may have made this have issues
I lost usb 2.0 feature, though I own no usb 2.0 devices
has no chipset fan


 

Tom

Lifer
Oct 9, 1999
13,293
1
76
I'm using an MSI 645 Ultra(Sis645 chipset) with a 1.8a,stock HSF, and 256mb Crucial DDR.

Some benchmarks at 2.4 gig(133fsb,333memoryspeed, 4:5 fsb/memory ratio,cas 2.5)
Sandra 2002
memory scores....2447/2426
CPU multimedia...9456/11528
CPU arithmetic......4502 1430/2938
3Dmark2001se .....8090 (GeForce3 ti200 at 220/500)


Some benchmarks at 2.52 gig(140fsb,355memory speed, 4:5 fsb/memory ratio,cas 2.5)
Sandra 2002
memory scores....2547/2549
CPU multimedia...9933/12119
CPU arithmetic......4721 1502/3087
3Dmark2001se .....8283 (GeForce3 ti200 at 220/500)

 

Duvie

Elite Member
Feb 5, 2001
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looks good!!!

I forgot to mention i am using spd, so I guess cas 2.5t also....


So it looks like if I go to 139fsb I may only be looking at about another 100pts in bandwidth....