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New to Overclocking - Radeon HD 7970

post #1 of 7
Thread Starter 
Well, I officially just ordered a XFX Double D Radeon HD 7970 Black Edition 3GB off of Newegg.

I've never done any overclocking myself, but from what I've researched it seems like just a matter of slowly increasing the clock in the CCC or another program (suggestions?) while testing for stability (what is a good test?). However, I'd feel more comfortable doing it if someone more experienced, especially with this specific card could outline the whole process. It's probably a lot easier than it seems but I am very unlucky when it comes to things like these.

I was going to follow this: http://www.guru3d.com/article/radeon-hd-7970-overclock-guide/1

However, I don't understand what they mean in the second page of their guide:
Quote:
"The lowest slider 'power control' slider is important, your 7970 is limited and tied to the cards power states. At default the maximum board power is roughly 215 Watt. If the GPU exceeds that then it can temporarily lower the clock frequency.

By increasing the power slider towards 20-% you increase the board TDP 215(W) x 1.20(MP) towards 258 Watt, this gives you more overclocking headroom. it's plenty enough for today's overclock."
Are they saying I should just slide the bar to the right to 20% to have more power directed to the card?


Also, here are some of my questions:

  1. What things in general should I keep in mind when overclocking? I know temperature is a big one, but I have lots of airflow in my PC.
  2. Will my CPU (stock) or motherboard cause any bottlenecks or will I be able to get the most out of this card with them?
  3. What settings should I generally set in CCC for games? I heard most people turn AA off in games and use the AAx4 in the CCC instead.
  4. I need to completely remove all my ATI drivers and CCC from my previous cards (2x Radeon HD 4870) due to an issue that will not let me open CCC. Does anyone know a process for this? I know about Driver Sweeper but I heard it can cause some problems and that there was a better program for this.
  5. I was thinking of also OCing my CPU. Any good guides or tips on how?
  6. 750w PSU is more than enough for a single OC 7970, right?

Thanks for your time and sorry for all the noob questions!
    
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post #2 of 7
A few things:
  • Overclock in small amounts, then stress test (Furmark is good for this). Rinse and repeat, going a little higher each time until you're happy with where you're at or you've reached the limit.
  • Overclocking the memory too much can actually cause speed decreases because of the need for increased error checking (use a benchmark such as Heaven to check for this).
  • Your 955 will be a slight bottle neck for the 7970 no matter how high you clock it in games that are heavily CPU dependent.
  • Your PSU should be fine.
  • For uninstalling drivers I just uninstall all AMD stuff from Add/Remove Programs, and then uninstall drivers from the Control Panel Display properties. Do this until you restart Windows and it tries to install it's own drivers.

Edited by jackrabb1t - 3/21/12 at 2:26pm
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post #3 of 7
Thread Starter 
Thanks for your reply. I will look into Furmark and Heaven. Also, I've tried uninstalling everything the usual way and even deleting some registries related to the drivers but I'm still not having any luck. This issue has been discussed a lot on the internet but I've had no luck with any of their solutions, though I've yet to try Drive Sweeper or similar programs. Still, some people on the ATI forums here mentioned another program that was better than Drive Sweeper and I'm trying to find out what it was just to compare.

Also, if I uninstall all my drivers related to ATI, will I still see output on my monitor? I think I tried this last time, and I couldn't get anything to show up on my screen for a while.
    
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post #4 of 7
Just to make it clear: Furmark is horrible for stress-testing. The only thing Furmark succeeds at is making graphics card die.

ATIMan is a great program for uninstalling drivers.
You will get an output without drivers, but the resolution will probably be 800x600 or 640x480 rolleyes.gif
Don't force AA through CCC unless you have to, the performance hit is simply bigger. Use RadeonPro to make game profiles for each game thumb.gif
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post #5 of 7
Thread Starter 
What would be a good alternative to Furmark?
    
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post #6 of 7
ProgenitorX welcome to the world of 7970 hooo haa.... driver nuts...

find a lot of good answers here: http://www.overclock.net/t/1196856/official-amd-radeon-hd-7950-7970-owners-club
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post #7 of 7
Thread Starter 
Thanks! I was going to originally post my questions there, but didn't want to hijack the thread with my personal stuff. I will reread the thread and see if there's anything I can use.
    
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