Two of us I know of tried the CCC profile tweak mentioned here, it's painless and so far I have been stressing my GPU with furmark and its passing long stress tests. Previous I would either crash the program because of some inherent driver issue or recreate the vertical lines!! NB Also I reinstalled 9.11 drivers and customed it to NOT install HDMI audio aswell. I dont why it's getting involved but seems like taking a potential contributor out of the equation is a good idea.
Try it and feedback or wait and see if new drivers fix it, and then come back and try it...
(I would'nt dare do the bios thing just in case i smashed my shi7)
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Let me start off by saying that the steps I'm outlining here happened to have worked for me personally. There's no guarantee that they will solve the issues that other people are having with these cards. Depending on system configuration, many more variables could be to blame.
Ever since I got the card, I have been plagued by 2 problems. The first one was the infamous vertical stripes problem, and the second was the random crashes when the computer was idle or in 2D mode (web browsing, light graphics, etc).
PROBLEM 1: Vertical Stripes. Description: When playing a 3D accelerated game, the card would sometimes crash by displaying the distinct vertical lines.
My solution: After weeks of forum trolling, I decided to bite the bullet and upgrade my card's bios to a "newer" one I found from ATI (my card is by XFX). I got the bios from here:
http://www.techpowerup.com/vgabios/61848/ATI.HD5870.1024.091112.html
Conclusion/Observations: Since the update, not a single vertical lines crash. But I did continue to get 2D problems, which led me to find the next solution…
PROBLEM 2: Random crashes. Description: While NOT playing games, ie doing anything in 2D or when the computer would go idle or into screen powersaver mode, the crashes were almost certain. Windows graphical corruptions were also a tell-tale sign of the card being unstable and an impending crash.
My solution: Again after much reading, I came to the conclusion that Windows 64bit was not playing nice with my 5870’s powerplay function. Mainly that the idling 157 clock speed was not enough to keep the card stable when idle. After updating the card’s bios, I could go hours without a crash when playing a game, but then it would crash after I was done, when it sat idle on the desktop.
I came across this solution that forces the card to idle (2D) at a higher clock. I had to set it to a clock speed that Windows 7 would be happy with. (For me this was 400 when idle, and the stock 850 when running games)
Steps:
1. Open CCC
2. Unlock and Enable Overdrive if they aren’t already.
3. Go to Options/Profiles/Profiles Manager. Create a new profile. Under composition make sure “ATI Overdrive” is checked. Save and Close, DO NOT ACTIVATE.
4. In windows go to: C:\Users\{yourusername}\AppData\Local\ATI\ACE\Profiles (you will need to have “show hidden files” turned on for this)
5. Open the xml document with the name of the profile you just created (notepad is fine)
6. Change the values of the Clock and Memory speeds to look like this (these specific values are what worked for me and my card, use judgment) EDIT ONLY THE BOLD VALUES.
Feature name="CoreClockTarget_0"
Property name="Want_0" value="40000"
Property name="Want_1" value="60000"
Property name="Want_2" value="85000"
Feature
Feature name="MemoryClockTarget_0"
Property name="Want_0" value="90000"
Property name="Want_1" value="90000"
Property name="Want_2" value="120000"
7. Save and close. Go back to CCC and activate the profile you just created.
This will make the card idle at 400core, 900memory. (2D clocks are the "Want_0" values)
Conclusions/Observations: My system has been completely stable for 4 days now, whereas before I would get 2-3 crashes each day.
I know this was long, but after much searching in these forums, I figured I should share my experience and solutions and hopefully help someone with the same issues.