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5750 bad OC - cant boot computer. dunno what to do next

post #1 of 7
Thread Starter 
Overclock on 5750 apparently failed. Computer will not move past splash screen ( accept i am able to get into bios ) but... first things first


My rig..

Mobo -MSI790x-g45
CPU - AMD Phenom II X4 955 Black Edition AM3
2ea. - XFX Radeon HD 5750 1GB PCIe DDR5
850w Power Supply
12gb DDR3

How I made a mess of things...

I used this tutorial to perform the overclocking on just 1 card. I wanted to leave one unaffected in case something went wrong.

http://www.legionhardware.com/articl...g_guide,1.html

I followed this guide step by step exactly as described. I finally got it stable at 815mhz core and 1360mhz memory. by stable i mean no artifacting and running furmark for 4 hours. my temp was 88' and fan speed was pretty stable at 44%. I noticed no problems at all and my score came back at 1484 on the furmark scale ( dont know if that matters ). Which doesnt seem to be very high... but its better than the 864 i got at stock speeds.

It may be of interest to know that i never got a bsod or system fail at any time during my overclocking ( all the way up to 830mhz core ) only artifacting during furmark.

the next morning I got up and saw everything from the benchmark came back fine and i restarted the computer so that i could change out cards and do the other one. It failed to start with the overclocked one in it. After the splash screen i got a blinking cursor in the top left corner. I restarted several times and this is all that happened. I figured the OC had failed so i popped in the other video card and logged into windows. I opened the catalyst overclocking software and reset everything to defaults ( even though the new card was still set to factory specs ) i restarted again and again system failed to load. i went into bios and reset to failsafe defaults and tryed to load again. this time i got an error loading operating system message and nothing else. i went back into bios and turned off fast boot so i could see how post goes. no post, just the message. i took that video card out and reset the bios jumpers ( only for about 2 minutes ). unplugged the psu and tried again.. same message. i took out the video card and popped in an old radeon x1650 i had laying around and it started again. it needed a restart after the 1650 drivers installed so i could open up catalyst again. now i get the same thing ... i dunno what to do at this point. I have tried to reinstall windows but cannot get to the point of reading a cd in which to do it.

I suppose the question at this point is.. is there a way to set these 5750's back to factory without the software?
Edited by iminent - 3/19/11 at 7:39pm
post #2 of 7
A couple (well a lot) of ATI fans claim Furmark can damage the VRM's of cards due to AMD's traditional bad vrm design. I'm not totally sure if what they say is BS or not but still I only run in short bursts just for benching purposes, and use games to stability test my overclocks.
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post #3 of 7
The overclock on the GPU isn't applied until the computer boots into Windows, so I don't think that is the problem.

Make sure that you've got the boot device priority set up right in BIOS.

Also, can you tell us what brand power supply you have?
     
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post #4 of 7
not really. the problem is that even though graphics cards have bios's they dont have jumpers. the only suggestion i have is if you had a motherboard supporting crossfire you could put the working card in the 1st slot and run the screen off that, and the second one in the 2nd slot with no crossfire bridge attaching them, that way you might be able to use the working card to boot and repair the overclocked card. to repair the overclock card, use GPU-Z and take a copy of the working cards bios and then use nvidia flash tool to flash it onto a second card. make sure you do a lot of reading into how nvidia flash tool works and how to select the card you want.
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post #5 of 7
Check to see that your hard drives are showing in your bios and they are at the top of the drive order.I would pull the battery first to be sure the board resets.
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post #6 of 7
Quote:
Originally Posted by railfan844 View Post
A couple (well a lot) of ATI fans claim Furmark can damage the VRM's of cards due to AMD's traditional bad vrm design. I'm not totally sure if what they say is BS or not but still I only run in short bursts just for benching purposes, and use games to stability test my overclocks.
i use Furmark all the time on my ATi cards, leave it running for 24 hours to stress test overclocks on them. the issue with Furmark is you have to check on your temps every hour or 2 when you run it. it can quickly push the card into the 100's if your not careful and you dont want it to do that.
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post #7 of 7
Thread Starter 
i suppose it is worth asking also. how could one bad OC affect 2 other cards. the only thing i can think of is that the computer doesnt recognize the individual cards themselves and that catalyst could have recognized that the second 5750 wasnt clocked correctly according to the settings i put in and changed them to my settings. but that doesnt explain why the same thing happens when i put in the x1650. does it?

also is there a better place on the forums to post this problem. i am not sure isolating it in the ati section is going to get it the attention i hope for.

thanks in advance folks for the help.
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