weird: new vga doesnt allow PIII tualatin OC

[vicenzo]

hi peeps. firstly, sorry for its not an up-to-date system at all, and not maybe xtreme as much as u freaks, but i love it, so i still use it, and here is my story

3 years ago, got a tualatin PIII 1000 @ 1447 babe..itz fekin 193 mhz fsb on a 133 fsb board. kewl, eh? tusl2-c @ 1.675 vcore coupled with kingston cas 2-2-2-7, fsb:dram is 4:3 ... again; everything is stock. no modz

with this rig got 5001 3dmark2001 points when i had a geforce2 ti. she was running nicely with all benchez, including games, 3dsmax rendering and stressing cant do her anything at all..stuck @ 49-50 load in summer fully stable, drops 45~ in winter. both temps under heavy duty..gotta get a killer coolin solution though, she really deserves it ;)

but a few weeks ago, i got maself a brandnew shining 9800pro and i was really excited about upcoming dream scores with this ol` machine.. guess what > it gets only a maximum of 1.133 now :(

i was using a 300w fsp psu, replaced via tagan 330w [380w peak for 60 secs] in case the power was the issue but nope, still not goin even 1 mhz from 1.133..

interesting case though..cuz i am not gettin 1.133 with 4:3 ratio..its 1:1 [151/151]

when i try 4:3 as it was before so, i can only get 1071 :( any attempt to get higher, results in those fekin pc speaker beeps! and nope, adjusting voltage and freqs one by one doesnt help either! dammit...

it cant be pci [thus agp] also, cuz its way lower in 1:1 config than 4:3 so WTF !!?

i tried a pci VGA and booga looga!! again 1447 mhz..

what could be the issue ? sure its radeon but what might be the exact problem? any advicez, vmodz, hacked bios recommendationz or whateva are greatly appreciated.

stay tuned,

vicenzo

[Shade00]

The AGP bus is running WAY too high for that 9800.

[saaya]

hey vicenzo, welcome to XtremeSystems! :toast:

might want to ask the expertz at www.tualatin.de ;) :D

i think the psu could still be too weak... did you try to run the card with more vagp? with agp1x? disabled sba?

[EnJoY]

I agree that it may still be a psu issue. Can you try a 500watt?

Also, your agp bus may be too high for that 9800 Pro. ATI cards are generally far less tolerant of high agp frequency than nVidia cards.

[Shade00]

I still believe it's the AGP bus. Running a 193mhz FSB with a 1/4 PCI divider results in nearly a 97mhz AGP bus - I don't think I've ever seen a 9x00 card run on that kind of AGP bus.

[vicenzo]

thanks guys..and thank you saaya, but i have no german :(

well, as i said in the topic, its kinda weird..

cuz in 1:1 ratio, pci (so agp) is more than 4:3 ratio..that means 37.76*2=75.5 versus 35.7*2=71.4

if it was the agp freq that holds me back, than it would get at least 75.5 in the 4:3 ratio too, cuz we see it has got potential..but it cant..
and its the same error beep till 180ish fsb..after than it even refuzes to beep :stick: :D so, i beleive it is only that high at which agp would be the issue for radeon..

for the psu suggestion, it can reach 1.133 > so it must be at least so whenever i try..but its max 1.071..and i dont have much peripherals only sound card, 1 hdd 1 cd and a modem..moreover, i dont think my budget will allow above 450w+, especiallly after paying so much for a radeon.. :rolleyes:

[saaya]

hmmm wait a minute... running the memory in async doesn change the pci and agp frequency at al so it shouldnt have an affect on the system stability...


without the radeon:

1000mhz 7.5x 133fsb/133mhz memory 1/4 divider 33.3pci 66.6agp
1000mhz 7.5x 194fsb/145mhz memory 1/4 divider 48.5pci 97.0agp

right?


with the radeon you max out at:

1133mhz 7.5x 151fsb 1/4 divider 37.5pci 75.0agp (thats the speed almost all 9800s max out)

right?


and with the radeon and the memory divider at 4:3 you get:

1071mhz 7.5x 142fsb/107mhz memory 1/4 divider 35.5pci 71.0agp


71 agp is already a bit high for radeons, and i think that running the memory in async stresses the chipset some more. maybe its creating more noise or a more unstable pci/agp signal in async so that you the reach the limit faster?

i saw a 9800 running at almost 100mhz agp speed, the guy was using high vagp and set the agp speed back to 1x or 2x and he also disabled sba and maybe also fast writes, dont remember.

try it! it also helped me to get cards to run at a higher agp speed by reducing the agp setting to 2x or 1x and disabling sba and fw.

have you tried that already?


pm rio71 (i think thats his nick name) he is a moderator on tualatin.de and he also spends time here. im sure he can help you.

[vicenzo]

yeah, you got the point exactly..and you could be very right about stability issues when cpu-ram is async.. i am already running it on agp2x, mobo doesnot support fast writes .im unsure though, i ve tried lots of sandra-like progs but every one says different if it supports or not..and i dont have an option in bios either, anyways. but it can support SBA..

so i will

1-try disabling SBA and if present, FW
2-after that the agp1x, which i hope doesnt cause a huge performance gap
3-and then i will contact the guy you mentioned..

and i will SURE keep you guys informed about my journey..

very big thanks for suggestions @saaya & all!

stay tuned,

vicenzo