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Gpu , memory clocks

Last response: in Graphics & Displays
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February 1, 2009 11:54:53 PM

i have a radeon HD 4830 pcie 512mb gddr3, the specs say GPU clock 575mhz , memory clock 900mhz-1800mbps. now in the ati ccc i enabled the ati overdrive i bumped the GPU clock up to 650mhz , and the memory up to 1100mhz, tested, accepted , applied changes.. and at the bottom of the ati overdrive screen it stills says current values GPU clock 160mhz , memory clock 250mhz. i have ati ccc 9.1.... ( i do have a 2nd matching HD 4830 to run crossfire ) but i want to find out why these clocks are low.. ( tried both cards same readings ) i would love the input..

system:
gigabyte mb: Ma790FX-DS5
phenom 9500 x4
2g corsair dominator
bfg 650 watt psu
sapphire radeon HD 4830
300gb , 250gb maxtor sata hard drives

ty for helping, harley

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a b } Memory
February 2, 2009 8:59:00 AM

Welcome to the forums!

Your GPU's are designed to underclock when not in use or under low usage.
As the CCC will show you the Current Values, you will see the low power clock speeds.
As soon as you start a game, both cards will automatically revert to your specified 650/1100Mhz.
February 2, 2009 4:34:11 PM

outlw6669 is exactly right. When your GPU isn't working, it's relaxing. When a game or anything graphically intensive comes up, it'll kick into full gear at the clocks you specified.
February 7, 2009 11:22:43 AM

thanks, was worried about it being a bad card, im used to nvidia, so i wasnt sure how this ati worked....btw im having a problem get it to clone with my hdtv , every time i try to clone it, it freezes up on me
!