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Corssfire 5770's Artifacting

post #1 of 8
Thread Starter 
So today I installed a new Heat-sink and overclocked my CPU via its multiplier to 3.6GHz (Phenom II x4 955 BE)

ran Prime 95 for 15 mins, no issues at all. Played a bit of Saints Row 2, no issues again at all, temps were in the low 30's.

Started up Battlefield: Bad Company 2, played for perhaps 1 and a bit rounds on Arica Harbor. Half way through the second round my Game appeared to crash and the colours went all screwed up and there was this really loud scratchy noise coming through my headset i like literally had to unplug it immediately it was so deafening.

So i immediately closed the game with task manager, and everything seemed ok until i went to reboot it to see if it would and immediately there is like well, here's a picture.

http://imageshack.us/photo/my-images/20/gpuissue.jpg/

once it gets past that it just hangs on the DICE logo screen before u can get to the menu

Apps on chrome started to crash like shockwave etc, also started getting Referenced Memory Errors. Icons like Folders etc also got that distorted colouring like on that picture of the BFBC2 Loader

My GPU's are two HIS Powercolour 5770's in Crossfire. Theyre temps are not high at all, and they've never overheated before.

My Motherboard Asus M4A79XTD-EVO
Ram 8gigs Kingston

3 case fans, 1 Coolermaster 212+ Cpu heat-sink

550W Corsair VX PSU

Any knowledge or help would be awesome

Edit 1: Just adding that when i did my overclock i did it clearly as i said via the Multiplier, i left everything else alone (its all set to auto by default?) except the core voltage which is set at 1.35V stock, apparently i should'nt have to touch that till higher speeds.

So im not sure if its a lack of power for the GPU issue because the voltage is the same as it would of been at stock?
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post #2 of 8
Try swapping positions of the cards.
     
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post #3 of 8
I had the same thing happen to me with my cf 5770s, shockwave wouldn't work but no artifacting, some games wouldn't run.

Rebooted a couple times, a couple days later it worked.
    
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post #4 of 8
swap the cards, back in the days this would be caused by overheating. top card not getting enough air? could also try down clocking them, or put ramsinks on the vram ... maybe use the second card as the display primary to even out the heat / load on the top card?
post #5 of 8
Quote:
Originally Posted by bradlah;13808812 
ran Prime 95 for 15 mins, no issues at all. Played a bit of Saints Row 2, no issues again at all, temps were in the low 30's.

I would reccommend longer testing in Prime95 of your overclock. A good 12 hours minimum. Run CPU Temp to monitor your temperatures aswell.

Out of curiosity did you reset your CPU back to stock? If so does the problem still persist? It seems your issues started after your overclock, which seems the more likely problem than anything else suggested so far (not trying to discount them but the overclock is a seemingly obvious cause).

If you're just using the multiplier try setting your voltage to automatic initially while you test. You can play with setting the voltage once you find a stable frequency and can use CPU-Z to monitor the frequency to make sure it stays in safe ranges while testing. Myself personally, I set everything to auto except the FSB and Multiplier which I played around with until I found a stable setting, then I started tweaking the other areas of the chipset.

If I remember rightly though make sure your HT Link stays between around 2000-2200. The higher this is the more problems it will cause with stability (this was what I was advised by several people when I started overclocking my system).

Not sure if it would be a lack of power or not to your GPU's. Try disabling one GPU via Catalyst, this would be the most obvious way of testing that.
Edited by Lifeshield - 6/9/11 at 8:10am
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post #6 of 8
Quote:
Originally Posted by Lifeshield;13809388 
I would reccommend longer testing in Prime95 of your overclock. A good 12 hours minimum. Run CPU Temp to monitor your temperatures aswell.

Out of curiosity did you reset your CPU back to stock? If so does the problem still persist? It seems your issues started after your overclock, which seems the more likely problem than anything else suggested so far (not trying to discount them but the overclock is a seemingly obvious cause).

If you're just using the multiplier try setting your voltage to automatic initially while you test. You can play with setting the voltage once you find a stable frequency and can use CPU-Z to monitor the frequency to make sure it stays in safe ranges while testing. Myself personally, I set everything to auto except the FSB and Multiplier which I played around with until I found a stable setting, then I started tweaking the other areas of the chipset.

If I remember rightly though make sure your HT Link stays between around 1800-2000 (*EDIT FOR ACCURACY). The higher this is the more problems it will cause with stability (this was what I was advised by several people when I started overclocking my system).

Not sure if it would be a lack of power or not to your GPU's. Try disabling one GPU via Catalyst, this would be the most obvious way of testing that.

^^ All this. Your overclock is not stable. Your GPU's *MAY* not be getting enough power on the 12v rails (someone fact check for me), though I highly doubt that such is the case (you're probably pulling ~350-400watts at stock and your PSU is of decent quality), but you need to take the correct approach to overclocking your CPU first.

Reset back to stock and check if things are working correctly. Test for stability for longer than 15mins of Prime95, even at stock. Do a good 6-12 hour Prime Blend run. Play games for hours, and check everything is working at stock on the CPU and video cards. Then slowly increase your CPU and CPU-NB overclock first. Do you graphics cards last. When overclocking you need to do incremental increases, testing for stability, then repeat. Once satisfied at a certain level, stress test for hours and hours in multiple ways.
Edited by willibj - 6/9/11 at 8:38am
 
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post #7 of 8
Thread Starter 
Yeah i reverted the overclock back to 3.2GHz now - everything appears to be stable again could play BFBC2 and not get owned by a crash.

when i did some research on OC'ing the 955 most people told me to just increase the multiplier. This is basically my first playaround with OC'ing so im not even sure what FSB is ect or what to increase with it because everything on my BIOS is set to Auto.
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post #8 of 8
When you go into Jumper Configuration, at the top you should see AI Overclock Tuner.

Set that to manual. Underneath that should be CPU Bus Frequency. This is your Front Speed Bus. This is set to 200 at default if I remember rightly. FSB x Multiplier = CPU frequency.

An example of how this works in effect can be seen in my CPU-Z validation:

unledsi.jpg

You can see my FSB is 250 and my Multiplier is x16.0.

Scroll down and make sure everything else is set to AUTO. (To set something automatically just type in AUTO when you have the cursor over the desired setting.) Then start increasing your Multiplier, one setting at a time, testing each time for stability until you reach an unstable multiplier setting, once you hit that knock it down a setting and give it a good strong test with Prime95.

Once you have a strong overclock with the Multiplier you can knock it back down to default and start increasing the FSB until it becomes unstable (make sure you're testing). When you find a safe limit then start increasing the Multiplier to overclock the CPU. This will be where you'll need to start tweaking voltages though most likely (which I would strongly advise advice from someone who is more experienced than myself).

On the same page you'll see HT Link (Hyper Transport Link) make sure this is as close to 2000 as possible, preferably not below. You should be able to set this manually. If left to AUTO it will most likely be set to the same setting as the FSB x10 (so if FSB is 250 it gets set to 2500). At least this was true from when I was playing with it.

You can save time by trying the FSB overclock first, but if you just want a fast overclock without worrying too much about Voltages etc, then the Multiplier is easier.

If you want advice from much more experienced AMD specific overclockers (which I strongly suggest) go to this section of the site.
Edited by Lifeshield - 6/9/11 at 11:15am
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War Machine
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