Artifacts in Radeon 9100

[ljerah]

Im getting this problem when running Nature in 3dMark2001se. Everytime I clock my mem to 400 Mhz (from default 370), I will see green spots floating around during screen 1, 4 and 5 of Nature (screen 2 and 3 has no problems).

This problem goes away when i reduce my mem clock to 396 Mhz

I installed ram sink and also placed a normal hs fan on top of it to provide more cooling

Any idea whats causing this problem? Other benchmark went fine without artifacts. Am I overclocking it too high?

My vga card is PowerColor Radeon 9100 Retail version

Note : anyone can teach me how to screen capture 3dmark2001se so I can show pictures.After all a pic is worth a thousand words

Thanx

[Bink]

I'd take it as a pretty sure sign that you've reached it's overclocking limit. Reducing the mem clock to 396MHz shouldn't make any real noticable difference in performance anyway.

[Justintime]

I'd tack it down to about 390- 395 for stability sake.

[ljerah]

Ohh ok I will reduce to 395 Mhz then.

I was afraid that my card's damaged or something

Just kinda disappointed that this card has low overclocking ability

[MuFu]

The stock memory speed is 370MHz (i.e. 185MHz DDR)?!!

I haven't heard of any 9100s coming with <200MHz RAM.

MuFu.

[ljerah]

I got the retail version I think

Retail version speed is around 185 DDR

That sux

[MuFu]

Yeah - sounds like 183MHz to me (5.5ns RAM).

If you can still take it back under a NQA return policy then I'd do that - get something you know the clockspeeds of! 183MHz memory will *severely* limit the card. Even a Radeon 9000 (non-Pro) would probably outperform it in many circumstances.

MuFu.

[ljerah]

Btw

I have just noticed something when I was overclocking my card. Seems to me like if i overclock at with the right core and mem, I would get less artifacts when running Nature

Like i mentioned earlier, when i overclock too high, I will see like green color dots floating around the screen. Looks like green fireflies to me

E.g 258 / 411 - 1 dot seen in the last 2 screen of nature
258 / 408 - 3 to 4 dots in first , fourth and fifth screen of nature

Any comments?