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Strange Graphic errors @ 1GHz Memory speed

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E.d.g.a.r

Registered
Joined
May 7, 2003
Location
Germany
Hay!

I have the following problem:

First the main system specs:

Intel P4 2.8 HT @ 3.5 GHz, 1,575 V
Kingston HyperX PC4000 @ 500 MHz, 2,6 V
Abit IS7-E
Ati Radeon 9800Pro, 1,55 V

The problem:
The system works stable and without any crashing even at 3.6 GHz. But when running some DirectX 9 applications like Aquamark 3 there are some strange graphic errors but the system won't crash.

After changing memory multiplier to 5:4 or reducing FSB to 220 MHz these errors are gone. When I disable AGP Fast Write the errors are also gone but graphic performance is low. So the problem is the memory acces over the AGP bus, right?

Now, what can I do to resolve this issue? I have tried another motherboard from the same type and a Ati R 9600XT card and I get the same errors when AGP fast write is on.

Maybe somebody has the same problem using an Intel 856 Mobo and 1:1 memory multiplier anf FSB higher than 220 MHz?

Can anybody help in this?

Greetings from Germany!
 
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