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gpus get worse performance when overclocked! Is that possible?

post #1 of 14
Thread Starter 
Ok on more then a few occasions ive noticed when I raise my gpu clock by 20 mhz or so and the memory as well I actually lose performance or fps how is that possible? Am I doing something wrong beacuse i am following the small increase of 5 mhz then testing with furmark but i get alot of video display adapter has stopped working but has recoverd when i push the gpu clock a little higher.On stock settings I get much smoother and reliable- no crashing performance so iam just going to leave them alone until I save up for something better what do u guys think? Its radeon 6570 in crossfire or dual graphics whatever u wanna call it
     
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post #2 of 14
Thread Starter 
To save u guys from having to look it up the stock config is 650 mhz gpu and 800 mhz memory
     
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post #3 of 14
It's possible if the GPU throttles due to power or heat limitations, or if the memory throws ECC errors.
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post #4 of 14
I thought you had to pair it with an APU for dual graphics?
Also it's likely that it just can't handle clocks much higher than defaults.
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post #5 of 14
Thread Starter 
Ok the heat is ok beacuse i monitor the heat and they never go past 40c! I wonder if maybe beacuse you cant change the voltege on them?
     
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post #6 of 14
Thread Starter 
Clark i have no idea man lol, iam running the fx 6100 cpu with 2 6570s
     
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post #7 of 14
yes, Those are all signs of unsuccessful overclocking. Just because you can get your video card, ram or CPU to run at a specific Freq dose not mean its running faster, Think of it as diminishing returns. This is the massiv "YMMV" part of overclocking. My advice is to always run before and after benchmarks, Its also best to overclock the CPU as far as you can get it while keeping full stability and improving performance, then move on to RAM(if your going to mess with OC'ing ram) then work on the GPU.

Sorry to say but a 6570 is not going to OC very well, and two of them will be a wast of time and money. Buy the single most powerful GPU you can get in your budget if upgrading, Then when you need more power you can pick up a second card for Xfire.

EDIT: if your running them in Xfire it could just be a driver problem. If your running in Xfire I would remove on of them and run a "stock benchmark" with just a single card, then overclock it and check. If the first card is able to overclock and not have problem's, then you can do the same for the second card. Once you have checked both cards you will have a known clock to try.

When you overclock the Xfire set up use the lowest core and mem clock's of the two individual cards. If the work individually but not in Xfire its a driver problem.
Edited by KhaoticKomputing - 9/7/12 at 12:26pm
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post #8 of 14
Thread Starter 
Is that and rx7 u got there? Nice! Anyway yeah its kinda to late I already bought them but i dont regret it it wasnt that expensive and a big plus if they break down while iam learning I wont need to replace 500 dollar gpus you know? Iam saving up to do the single 7970 or 680 nvidia
     
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post #9 of 14
Quote:
Originally Posted by nz3777 View Post

Is that and rx7 u got there? Nice! Anyway yeah its kinda to late I already bought them but i dont regret it it wasnt that expensive and a big plus if they break down while iam learning I wont need to replace 500 dollar gpus you know? Iam saving up to do the single 7970 or 680 nvidia

You get what ya pay for, cards in their price range are going to have tacky gaming performance, Those specific cards lack external power, so they arn't working with much headroom for overclocking. I would count your blessings, you got them to actually work in Xfire. Those cards or more for media machines/low power business application, the 6850's are what you should have started with. They would have cost you a bit more but a much better suited for Xfire and gaming application.

I would recomend you not get a 7970 or 680 GTX, but instead look for a 7950 or 670 GTX and overclock the snot out of it thumb.gif You won't ever notice the difference.

EDIT: yes, that is a rather sexy FC RX-7 (86-91, tail lights say 89-91 model). Dont know/can't tell if its a turbo but I do know its a EURO car with a stupid rare spoiler made here in the USA...(erubuni, company made very few then went out of business). I wish my 7 was half as sexy as that one smile.gif
Edited by KhaoticKomputing - 9/7/12 at 12:39pm
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post #10 of 14
Thread Starter 
have u heard of a company called/ re amemiya/ its a japanese aka jdm exterior body kits company, u will see the sexiest rx7s in exsistence on there web site! Check them out when u get a chance, and another really good one would be/feeds/ not sure if iam spelling it correctly? Those rotary engines are a piece of art man I tell u, they rev past 10,000 like a mmotorcycle I swear, yours the turbo model? So the 670 or 7850 huh? What about the 660 is that one any good?
     
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