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OC doesnt seem to work with 2900 xt's

Forum Graphic & Displays : Graphics Cards - OC doesnt seem to work with 2900 xt's

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Romstar   07-12-2007 at 09:27:02 AM

I currently have 2 2900 xt's in crossfire on an intel dbx2 motherboard and 1 kilowatt psu and my system is running beautifully. SO Since I am using a 30 inch dell monitor i wouldnt mind some extra frames in games fully maxed out so i decided to overclock my video cards with the simple ati overclock utility in the drivers. It easily gets me 858 mghz core and 900 mghz memory. My problem is as soon as I start up a game my system freezes. The reason it freezes im guessing is from overheating. I noticed whenever i start up a game my video card fans dont even spin up to cool the vpu like they normally do. it just freezes b4 they even spin up. Is there anyway I could get them to spin up before it freezes or is this not even my problem?

------------------------------ Q6600 @ 3.0ghz, 2xpny pc8500 @ ddr2 533 5-5-5-15, raptor 150 gb, 2x 2900 xt, badaxe2, Creative SB-XFI Elite Pro, Dell 3007wfp, Silverstone 1kilowatt psu, Windows Vista ultimate 64 bit.
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ira176   07-12-2007 at 10:27:50 AM
- 0 +

Try backing off on the mem to 850 mhz and core to 800 mhz. Make sure that you have adequate cooling and ventilation.

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Romstar   07-12-2007 at 10:54:02 AM
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while the overclocking utility runs it actually take them to those temps and they run perfectly because the fans just speed up, so I dont understand why it just doesnt do that in game.

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Romstar   07-12-2007 at 11:07:40 AM
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I lowered them and it ran and didnt freeze.

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rammedstein   07-12-2007 at 11:55:59 AM
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when you clock em up to that speed, they may be running at that speed but not be under load, when you put any kinda load on them they'll error and crash, as per what is happening

------------------------------ -"From whence you came you shall remain, until you are complete again!"

Peter Mitchell

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Romstar   07-12-2007 at 12:00:10 PM
- 0 +

oh ok... well that makes no sense how the automated thing does that then.

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