View Full Version : Ati X800xt Pe Bios
Hi,
I have an ATI X800XT PE 520/560 gpu. Yesterday I found a 526 / 573
bios for this card on the bios collection. I flashed my card to see what happened. Funny enough the card runs at 520/554 now, HOWEVER if I tick the overdrive box in the driver set it now overclocks the gpu to 545/554 whereas with the original bios it only clocked it to 526/560. Atitool tells me that the original mem speed is 573 but that it runs at 554???
My performance has improved with the overdrive box ticked and system is running stable, so I'm happy. But it really fascinates me that the memclock runs at a lower speed... Any idea why? (I'm not comfortable to go voltmodding, but maybe that's the answer?)
peta01
11-24-2005, 07:55 PM
Memory clock has almost no influence on performance. The important thing is your core clock. Dont use the overdrive, it's for noobs. Use ATITool to find max stable core frequency.
Thanks for telling me that I'm a N00b... but you did not answer my initial question: why is the mem stockspeed running at 554, whereas the bios tells it to run at 573???
Thx
peta01
11-28-2005, 08:15 PM
Sorry, I didn't mean this personaly on you. I just wanted to point out that using ATITool you can gain more performance.
Maybe you changed your memory timing by flashing new bios. So your mem is now faster, but cant run at clock you wrote. Try to find your max mem with ATITool.
No worries m8, I'm not offended easily ;) Anyway, I thought the same, although the previous stockspeed for the mem ran at 560... Re Atitool. I never managed to overclock the card over 539 with atitool, whereas the card now runs very stable at 545... :confused:
There may be a relation with the lower stockspeed for the mem?
peta01
11-29-2005, 07:33 PM
Did you scan for artifacts at 545? It might look stable, but there could be artifacts.
Run some benchmark, then run artifact scan.
In fact, I just did! I used the Rabit tool to edit my original bios (saved as a new file of course!!!) clocking the card at 545/560... Just ran 3dmark05 scored 6498 and immediately afterwards tried to overclock even further. Atitool clocks it up to 548, and does not find artficats for 10 mins, got bored afterwards. Do you know why he does not push the clockrate any further? (Probably need to change an overclocking setting...)
OneCool
11-29-2005, 08:56 PM
Memory clock has almost no influence on performance. .
:wtf:
peta01
11-30-2005, 09:51 PM
In fact, I just did! I used the Rabit tool to edit my original bios (saved as a new file of course!!!) clocking the card at 545/560... Just ran 3dmark05 scored 6498 and immediately afterwards tried to overclock even further. Atitool clocks it up to 548, and does not find artficats for 10 mins, got bored afterwards. Do you know why he does not push the clockrate any further? (Probably need to change an overclocking setting...)
Yes there is safety limitation in ATITool, but it is disabled by default. Click on Settings and there you will see "Use clock safety range", uncheck this option and try again.
INSTG8R
11-30-2005, 10:13 PM
the ATI overdrive will only set it to its "default"OD settings so in my case with my XT if I say flashed my clocks to 520/520 if I turned on OD it would default it back to 506/500("default" OD clocking)make sense? Basically it only had a "set" number no matter what your clocks are.
the ATI overdrive will only set it to its "default"OD settings so in my case with my XT if I say flashed my clocks to 520/520 if I turned on OD it would default it back to 506/500("default" OD clocking)make sense? Basically it only had a "set" number no matter what your clocks are.
Yeah, that figures, since when I flashed my edited original bios the 'overclock' function actually clocked the gpu back from 545 to 526.... Anyway, I reinstalled the atitool and tried pushing the gpu further, but the system hang at 560/560. Scanned for artifacts at 555, but hang again after 7 mins. So I'll just keep it as is... Scanned for 25 mins at 545/560 without artifacts and scored 6507 in 3dMark05. Not sure whether I should try to overclock my mem... What do you guys think?
peta01
12-01-2005, 09:15 PM
Yeah, that figures, since when I flashed my edited original bios the 'overclock' function actually clocked the gpu back from 545 to 526.... Anyway, I reinstalled the atitool and tried pushing the gpu further, but the system hang at 560/560. Scanned for artifacts at 555, but hang again after 7 mins. So I'll just keep it as is... Scanned for 25 mins at 545/560 without artifacts and scored 6507 in 3dMark05. Not sure whether I should try to overclock my mem... What do you guys think?
Yes overclock it. It has not so big influence on performance as core clock, but threre is some.
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