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More important core clock or memory clock

Last response: in Graphics & Displays
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November 5, 2012 3:48:48 PM

Hi All,
I'm wondering which one is more important when comparing HD 7850's
SAPPHIRE Radeon HD 7850 11200-01-20G
core clock: 975MHz (Std 860) / memory clock: 1200MHz (4.8Gbps)
GIGABYTE Radeon HD 7850 GV-R785OC-2GD
core clock: 920MHz / memory clock: 1250MHz (5.0Gbps)

Will the higher core clock or the higher memory clock show a bigger difference? I will not be overclocking it and I have PCI 3.0 on my mobo.

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a c 166 U Graphics card
a b } Memory
November 5, 2012 8:46:30 PM

With the small difference there, you won't see any difference between the cards unless you run a benchmark on them. A rule of thumb is that a video card, or a computer in general, has to be 20-30% faster before you can really tell the difference without a benchmark. You're looking at a few % difference in speeds. Get whichever card has the best warranty and/or price and reviews.
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a b U Graphics card
a b } Memory
November 5, 2012 9:31:03 PM

ibjeepr said:
Hi All,
I'm wondering which one is more important when comparing HD 7850's
SAPPHIRE Radeon HD 7850 11200-01-20G
core clock: 975MHz (Std 860) / memory clock: 1200MHz (4.8Gbps)
GIGABYTE Radeon HD 7850 GV-R785OC-2GD
core clock: 920MHz / memory clock: 1250MHz (5.0Gbps)

Will the higher core clock or the higher memory clock show a bigger difference? I will not be overclocking it and I have PCI 3.0 on my mobo.


Although you cannot compare cards like this to figure out which one is "better", all things being equal, core speed relates much closer to a difference you can actually see than the memory clock. As rule of thumb for instance when overclocking a GPU, you always work with core speed first to attain the best performance possible, then tweak the memory speed last to gain that miniscule fraction of a percent more. It may even be beneficial in your overclocking efforts to lower the memory speed if it will allow you a higher core clock and end up with better performance.
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a c 147 U Graphics card
a b } Memory
November 5, 2012 11:08:27 PM

core vs memory the winner will be core clock anyday. increasing core clock will increase the performance but increasing the memory will not unless the bandwidth somehow are bottlenecking the card
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November 6, 2012 2:42:45 AM

Ok, thanks guys! Much appreciated.
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November 6, 2012 2:44:39 AM

Best answer selected by ibjeepr.
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