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Performance drop after upgrading 4770 to 5770

post #1 of 17
Thread Starter 
Hello!

I bought a Sapphire HD5770 Vapor-X card, and ran Vantage, because i was curious. My scores hit around 7400GPU and 7400 CPU, while with my old 4770 this value was around 7000GPU and 9800CPU.

After a reboot, i got a result with 9600GPU 9600CPU...i was happy, thought it was some driver problem, which got solved by a restart.

Today i noticed that my FPS is quite low in a game(25 fps in starcraft 2), so i ran vantage again. My results are around 7400-7400 again.

I put back my old 4770, and still see, that my CPU score is stuck around 7400...

My VGA upgrade caused CPU performance drop (and this much??)? How is it possible? I didn't do any overclocking, it always ran as stock.

Cfg:

Q8300 2.5Ghz
Sapphire 5770 Vapor-X
4GB Geil EVO
ASUS P5K/EPU

Has anyone had the same problem?
Help please.
post #2 of 17
What driver version are you currently using?
post #3 of 17
I'd say you have a CPU bottleneck but i could be wrong
Also what PSU are you using?
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post #4 of 17
Thread Starter 
11.2 Catalyst

Got a 420W PSU...but no ODD and only 1 HDD...and i havent got any restarts either.
Not sure about bottlenecking...as both got around 10k vantage points normally
post #5 of 17
5770 requires "450 Watt or greater power supply with one 75W 6-pin PCI Express® power connector recommended "
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post #6 of 17
CPU is holding it way back...
post #7 of 17
What power supply are you using.

420W isn't a detailed enough answer.
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post #8 of 17
No way a quad is holding a SINGLE 5770! must be driver related or your psu cant deliver it enought juice. my2c
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post #9 of 17
What brand power supply is that? Is this a computer that you built yourself or that you bought from a place like best buy? If it is from best buy or futureshop or some place like that then chances are that 420 watt is some no name crap PSU that isn't 80 plus certified. Chances are the video card isn't getting enough power and is throttling down because of that.
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post #10 of 17
Thread Starter 
LC Power :S

But still...no restarts, no ODD, and when i put back my old 4770, the CPU performance was still bad.
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