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Overclocking 5770 fail...why?

Cat_In_Pyjamas

Cat_In_Pyjamas

Cat_In_Pyjamas

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Long story short, after looking on the web a fair bit, I decided to tune my sapphire vapor-x 5770 up to the max settings CCC would allow it (running the 10.11 drivers). When I ran the test, it was successful however shortly afterwards I'd get lots of artefacts showing on screen (under literally no load) and the PC would freeze. Sufficient to say I reverted to factory settings quite fast.

Any hints as to why the card could not pull it off? Would my Corsair TX 650W be the culprit here?
 
Probably because you overclocked it with the same finesse as using a sledge hammer to hang a painting :P Don't just wack all the settings up to full and expect it to work - read a few guides first and work in increments to find what your card is capable of and at what kind of level it becomes unstable.
 
Sorry wasn't quite clear there. I did it in small increments (not 5MHz mind you - something like 15 MHz jumps it was) - finally got to the top of the slider. The test succeeded again, for a while the card was fine then it croaked out.

In addition - now I can't seem to overclock the thing at all - even minor increase in clocks causes my screen to go totally black or white with pinkish stripes during tests instead of the green stiped screen with AMD logo =/
 
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iamtheoneneo said:
youv overclocked far to much without sufficent cooling or control....thats why its starting to die on you.
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:rolleyes: if hes not touched the voltages i doubt any damage is done, 5770 are very cool running the std cooler copes even o/c heavly.

Any way i had 3 5770's before going to 2 5870s from what i remember clocking the memory over 1300 was a bad idea and slowed the cards down, dont forget they throttle themselfs.

I ran 1 of my asus v1 at 1000/1300 at it was pretty quick, the other 2 would only do 950 core, 2 out of the 3 had the same blue/pink pixels crashing on 2d apps and got RMA accepted
 
BigBruiserAl said:
:rolleyes: if hes not touched the voltages i doubt any damage is done, 5770 are very cool running the std cooler copes even o/c heavly.
Click to expand...

Indeed havent messed with voltages at all. Increased it at small amounts at a time all the while doing tests. They all succeeded so i didnt expect any issues. Went to the top of the slider only because i saw some tests showing it capable of doing it. After the final test succeeded i ran a few games to check temps under load. All was fine. Switched the pooter off for the afternoon then the next day i got all sorts of artifacts. :|
 
I overclocked my 5850 to full staright away cos i simply didn't know better. It worked fine. PS. MY 5850 is currently in the RMA process!
 
Most of them will max out on ccc but a lot have a limited memory overclock often the max is around 1300 mhz for memory
 
Try using MSI afterburner and as the others have said in small increments with small increments in voltage. Also ahve a look around and see what others achieved for a rough idea what you can expect.
 
Any tips on what's safe with voltage adjustments? Also, just looking at the afterburner - how do I know my card is stable under the overclock? Created a 3D profile for it but unless there's a 3d program running I don't think I have any means of checking the performance - let alone stability of the card?
 
If you want to be 100% sure use furmark (MSI combustor is included with your afterburner download and is basically furmark with a new skin).

Be prepared to lower your overclock a lot and don't leave it alone while running, it will really stress your PSU and graphics cards.
 
Well, just tried it - even at default clocks, the GPU temp monitor climbs to well over 70 degrees - is that what should be happening? I believe hearing it should not go above 50?

EDIT: If internets are anything to go by, that's actually normal. Any explanation though as to why default clocks DX10 no AA test peaked at 84 degrees while default clocks DX 11 AAx8 is peaking at 78?
 
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