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How To: Overclock Your AMD / ATi GPU - Page 40

post #391 of 644
Hi,

I have been trying to set up 2D/3D clocks for the ATi 5650 in MSI Afterburner.

I've used AMD GPU Clock Tool to push the clocks , and used Furmark plus games (Crysis / SC2) to test the stability for overclocking, and have found out that the ballpark is ~750 MHz core / 1125 MHz memory (coming from 550 MHz / 800 MHz stock). The 5650 is known for being a little overclocking demon.

Now, with ATi there is a Powerplay function which automatically scales down the GPU clocks to 100/200 whenever there's no load, IF the clocks are at stock level. Using that in conjunction with MSI Afterburner (set 2D profile to stock clocks, 3D profile to OC clocks) would theoretically work well but...

It can't push past 715 / 1040 MHz without screwing that up.

I can certainly make it overclock past that (by setting OC clocks, then reopening MSI Afterburner), but then I lose the 550/800 2D profile.

Is there any way of doing this without getting hindered in overclocking? An unlocked MSI version maybe? Or another overclocking tool which also does 2D/3D profiling and doesn't have limited clock range?

Thanks for reading.
    
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post #392 of 644
Are you using the latest version of Afterburner?
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post #393 of 644
This will be my first overclock on a GPU and was looking for a little more insight for Crossfire configs. It was stated in the guide that you can do each card individually and test each individually by not running the stress in full screen. To me, I think that would be best since no two cards are alike and each card should be tested seperately to obtain the best clockings, but would running two cards at two different clockings be a problem?
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post #394 of 644
Quote:
Originally Posted by DayzaStarr View Post
This will be my first overclock on a GPU and was looking for a little more insight for Crossfire configs. It was stated in the guide that you can do each card individually and test each individually by not running the stress in full screen. To me, I think that would be best since no two cards are alike and each card should be tested seperately to obtain the best clockings, but would running two cards at two different clockings be a problem?
Usually after you find the best clocks for each individual card you set them both to the lowest of the two.

For example:

Card 1 stable clocks = 850mhz GPU 1400mhz Memory
Card 2 stable clocks = 835mhz GPU 1408mhz Memory

In this case you would set both to 835mhz GPU 1400mhz Memory
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post #395 of 644
Quote:
Originally Posted by clark_b View Post
Usually after you find the best clocks for each individual card you set them both to the lowest of the two.

For example:

Card 1 stable clocks = 850mhz GPU 1400mhz Memory
Card 2 stable clocks = 835mhz GPU 1408mhz Memory

In this case you would set both to 835mhz GPU 1400mhz Memory
I wanted to assume this, buuut you know what happens when you assume...so thanks for clearing it up for me
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post #396 of 644
Quote:
Originally Posted by clark_b View Post
Are you using the latest version of Afterburner?
Yes indeed. I think the problem is that with most people, the default range of OC (after unofficial overclocking has been unlocked in the setting file) is already wide enough for them not to be able to go over before their GPU crashes; in my case my GPU can easily pass that limit without destabilizing or heating up too much.

Is it possible to widen the default range of over/downclock, while the profiles are all saved?
    
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post #397 of 644
I'm not quite sure.
Hopefully someone who has more experience than I with these newer cards can chime in...
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post #398 of 644
Very nice guide, thanks for that, but..

- GPU Tool did not work on W7 x64, but that's not your fold, so i had to use an other progs, was difficult to measure.

My question is: i have a HD4870 default 600 gpu core and 900 mem core.
But when i do a stress test with default settings my FAN speed comes around 90/91 Celsius.

So there is little margin for me to aprove, do you have any alternative tips?

Thanks in advance

Daniel
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post #399 of 644
Quote:
Originally Posted by magehert View Post
Very nice guide, thanks for that, but..

- GPU Tool did not work on W7 x64, but that's not your fold, so i had to use an other progs, was difficult to measure.

My question is: i have a HD4870 default 600 gpu core and 900 mem core.
But when i do a stress test with default settings my FAN speed comes around 90/91 Celsius.

So there is little margin for me to aprove, do you have any alternative tips?

Thanks in advance

Daniel
What brand, etc. is your card? Is it under warranty still? Have you changed the fan speed settings?
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post #400 of 644
this is the best!!
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