Problems, problems....

jadawgis732

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Mar 13, 2009
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So I have a 4850x2 1GB, a Brisbane 5800+, and a Gigabyte MA-770-UD3. I have a 500W Topower running it, which will be replaced soon. I am not sure which is the problem, but I read that at load the 4850x2 only consumes 180W.

I had 3dMARK05 running on windows 7 x64 build 7048, and got a 16500 which I thought was low, and moved to Vista 32bit while I wait for x64.

I was running 4GB of GSkill PC2-8500, but found that with only 2GB, I could get 550 Operations Per Second on the airplane test as oppose to 250 or so.

The problem is that my screen goes black during some part of Vantage, and I must reboot to get it back up and running. The temps are fine, 39-59 for the GPU and 7-29 for the CPU. The ambient is around 30-33.

I have read that the brisbane 5800 needs help, ie more voltage. At stock it is 1.40 V, 200 FSB x 15 multiplier. I have increased it to 204x14.5 @ 1.45 and it completed vantage albiet with only a P score of 4850, and with 4GB Ram, 2Gb seems to test much better, almost 2x as well. At 208x15 @1.5 It fails around the 5th feature test.

I am using catalyist 8.561 as 9.3 would not even start the test. The ATIKMDV.sys or something fails, crossfire gets disabled, and I am back in Windows with some kind of messag on from the system tray saying that Basic was enabled, and the Display driver failed. This happens whether I have aero on or not.

Please help, I am open to all suggestions.
 

Dahak

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Mar 26, 2006
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I have come across a similar issue several times over the years.After extensive trouble shooting,the culprit is usually the PSU.Look for a good 550-650watt psu with at least 50amps on the 12v rail.That should fix your problem.I would not increase the voltage to the cpu as long as it's running at stock speeds as this will do nothing other than increase the temps on your cpu.CPU is designed to run efficiantly and stably at the stock voltage by the manufacturer.Only increase the voltage if you are overclocking.Goodluck.

Dahak

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