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Old 3rd May, 2005, 08:52 PM
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Question Undo-Overclocking on Video Card

Hello. I am new to this website and new to computer gaming. I don't know a whole lot about computers, but I have known enough to get me by. I got a video card from a friend that has been overclocked. It is a 5900 that has been oc to a 5950 Ultra. The card may have been a 5900xt, I am not sure. I am have stability issues with this card sometimes causing my system to crash all together or causing it to go into a sort of "safe mode" saying that my card is overheating.

My question is, how do I undo the overclocking. Is this even possible. I don't know how to overclock myself so I would greatly appreciate any help or advice. Thanks for looking at my post.
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Old 3rd May, 2005, 09:05 PM
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I heard you take out your gfx card, get PCI one boot up, then replace??
Or use some software like RivaTuner to clock down.

Anyways if it doesnt work im sure some one can sort it out here!.
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Old 3rd May, 2005, 09:11 PM
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It sounds like the card has been flashed with a modded video BIOS from a 5900 to a 5950.

I never did this myself, when I had a 5900U, because it seemed a bit dodgy to me.

It may be possible to flash it back to how it was, but you would need the original BIOS for that exact card, same revision etc.

There are members here who have better knowledge than me on this, who may be able to give you better help.
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Old 3rd May, 2005, 11:15 PM
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OK, how about as a starting point, we try to stop your card from overheating. The best way to do that is to clock it down a bit. Lets clock it to the specifications of a 5900XT.

First you need to download a driver that supports clock speed control. If you go to AOAFiles.com or click files, at the top of this page, you can download the Valance Studios 76.50 drivers. Installing these will give you a speed performance, but more importantly will display clock settings.

In the driver properties, you should see a clock frequencey control. This will enable you to reset your clockspeed.

You need to go manual overclocking.

Then, set your 2D clock speeds to 300Mhz core, 700Mhz DDR. If you are slightly off, it doesnt matter but keep it lower rather than higher, but not toooo much lower.

Then set your 3D clock speeds to 390Mhz core, 700Mhz DDR. once again, air on the side of caution, and go lower if you cant set it exactly to that, but not too much lower.

The driver can be downloaded here http://files.aoaforums.com/index.php?dir=138

This is the safest way to sort out your video card. Flashing is not an option for you at this point in time. As Danrok suggested, its a dodgey upgrade. There is a very real risk of destroying the card with a flash, and although you can get the 5950 bios to flash it to, you can rarely ever find the original bios to flash it back.

As a general rule of thumb, when it comes to an operation as drastic as flashing a card, if you dont know how to do it on your own, dont do it!

Experienced overclockers and videophiles can do it if they know how to do it and have experience and knowledge on their side, but most people should steer clear of it. Sadly alot of people see hammer and nails modification as the only way to improve performance. By using cutting edge modified beta drivers, and overclocking heavily, but with respect for your equipment and its capabilities, you can get incredible performance without shortening the life of your equipment or risking its life.

Hopefully that should stabilise your card. If it doesnt, please write back mate!

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Last edited by dsio; 3rd May, 2005 at 11:27 PM.
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Old 6th May, 2005, 07:19 AM
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Thanks for the extensive reply. I did everthing that you stated and about 2 minutes in the upload of my game my whole system completely shut off, instantly. There is a faint noise coming from the card. I put in my old 5700u and the game runs fine, I guess that the 5900 is fried. Thanks for the help, I greatly appreciate it.
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Old 6th May, 2005, 08:07 AM
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Its very unlikely that the 5900 is fried. underclocking can do that to a card, but hopefully it will be easy to recover. Do you know what the manufacturer of the card is?

Also are you sure the video card was properly seated in its slot at the time that happened?
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Last edited by dsio; 26th December, 2005 at 07:45 AM.
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