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How To: Overclock Your AMD / ATi GPU - Page 11

post #101 of 644
Thankyou heaps for this thread from an exNvidia fan. Joined the red tide at least til Fermi 2. lol
post #102 of 644
i am new to ATI, with a nice cool Sapphire 5850. I really like to avoid the hassle of having to use two-three applications to O/C and struggle to keep powerplay. Some are suggesting me to flash to ASUS 5850 or even better 5870 (.... scary) Maybe the 1.5 AB does it all without the use of AMD GPUTool ?

Also , what are the suggested voltages per clocks ? eg what voltage for 850, 900, 1000

Thanks
Edited by monographix - 2/21/10 at 9:31am
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post #103 of 644
Thread Starter 
Quote:
Originally Posted by monographix View Post
i am new to ATI, with a nice cool Sapphire 5850. I really like to avoid the hassle of having to use two-three applications to O/C and struggle to keep powerplay. Some are suggesting me to flash to ASUS 5850 or even better 5870 (.... scary) Maybe the 1.5 AB does it all without the use of AMD GPUTool ?

Also , what are the suggested voltages per clocks ? eg what voltage for 850, 900, 1000

Thanks
Really there is no easy fix. Every card will vary quite dramatically, so it's difficult to say what clocks your should be stable at at what voltages. Really it's not that difficult or time consuming, and it really is the best way of doing it. In my opinion flashing BIOS is far more effort than using afterburner with GPUTool.
I believe evga are working on a new program that should integrate stress testing, artifact scanning and overclocking, but this is nowhere near ready (not even in beta) and theres no concrete guarantee it will work with ATi.
I know it's probably not what you want to hear, but thats my
post #104 of 644
i just tried AB 1.5 and it seems to be doing everything-in-one.

1. Successfully unlocked voltage
2. Powerplay retained through auto profile switching 2D/3D (nice)
3. Auto fan control curve works great
4. It seems to retain the O/C settings
5. Incorporates Kombustor for O/C stress test and artifact scanning (if i got it right as it looks identical to GPUTool)

Now, i OC right away at 900/1200 with 1.25V. I read somewhere that 5850 go to 1000/1200 with 1.35, so i thought 1.25 is safe (is it?) and since i read also that it runs stable at 850 with 1.162. Kombustor and rthdl seem fine, no issues so far. What you think?

And to what settings should i leave CCC OverDrive at ? disable OD ? or it doesnt matter what i have in the CCC OD panel ?
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post #105 of 644
anyone know why i do not see anything in gpu tool? i do not see any clock speeds etc. all i see is the 5800 series thing at the top and i can run the test for stability
    
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post #106 of 644
I just used ATI Tool to Overclock an old laptop's x1300 Mobile. Core went from 200MHz to 499MHz (That's a 60% overclock), I can touch 550, but I get a few artifacts and Way more heat. I also used RivaTuner to take my XFX 4650 from 500MHz Core to 750MHz and my memory (1 GB DDR2) from 450MHz to 625MHz Stable, no artifacts can probably go further.

Loving my ATI cards vs. my old nVidia 9500GT and 9800GS. With my 9500GT I couldnt clock it more than 75MHz over stock, I get +250 on core and +175 on my Radeon. Sweet.
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post #107 of 644
I was just playing around and I somehow ended up with a 150% overclock...

http://www.techpowerup.com/gpuz/vrz8n/

Yeah, that ain't right is it?
It states my default clock is 400 MHz when it -should- be 725 MHz.
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post #108 of 644
I have a great trick that I stumbled on (I don't think it's in any of the guides).

Sometimes you can't stop the card from freaking out if you overshoot too high - even if you back down the clocks to stock. Normally people would reboot and everything will be fine. All you need to really do is reboot the video card.

What you do is turn on "Repost Video on S3 resume" in your BIOS. Most mobos have this, even low end ones. When you fail an OC and can't recover when you go back to stock, just hit sleep on your OS. Make sure you wait until the PC goes into full sleep mode, then turn your PC back on. Your video card will go reboot itself and all will be well again.



Saves a lot of time for me and this works with any make video card.
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post #109 of 644
How do you guys check for when you've hit max oc for 5800 series memory? I ask since the 5800 series has error detection on the RAM so I don't think I'll see any artifacts due to this feature.
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post #110 of 644
Quote:
Originally Posted by Rpg2 View Post
How do you guys check for when you've hit max oc for 5800 series memory? I ask since the 5800 series has error detection on the RAM so I don't think I'll see any artifacts due to this feature.
Well, FPS starts to drop instead of increase past a certain memory frequency on my 5770.
 
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