Graphics card GFLOPS - Important for WU speed?
16 Aug 2015 20:30:04 UTC
Topic 198192
(moderation:
Hi,
I am wondering if a graphics card that has higher GFLOPS will process WU's faster?
GPU benchmark points (http://www.videocardbenchmark.net/high_end_gpus.html):
HD 6990 5,099 GFLOPS - 2,817 points
HD 5970 4,640 GFLOPS - 2,610 points
HD 7970 3,788 GFLOPS - 5,204 points
HD 6950 3,178 GFLOPS - 3,178 points
HD 5870 2,720 GFLOPS - 2,602 points
HD 7850 1,761 GFLOPS - 3,746 points
Of these six cards the HD 7970 is given the highest number of points on GPU benchmarks but I think these numbers are related to overall card performance and can be dependent on the CPU used for example. Those points probably give a good gauge on how well those cards might perform in games but in terms of actual speed performance to processing single Arecibo WU's at a time, would the HD 6990 complete a WU the fastest because of its larger number of GFLOPS? The HD 5870 would then complete a WU faster than a HD 7850 because of its roughly 1000 more GFLOPS despite the lower number of passmark points?
In other areas like gaming maybe the GFLOPS will not be super important to overall gaming performance FPS but will it make a big difference in the time it takes to process a WU?
Thank you for the help!
Graphics card GFLOPS - Important for WU speed?
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Hi,
For BRP work i've seen that the memory bus width is the most important factor.
A 354 bit card as mine (ATI R9 280) is really fast.
Mine can process 2 BRP6 WU at the same time in 1h30min. (8800credits)
Tha same applies to BRP4G WU.
RE: Hi, For BRP work i've
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Hi,
Thanks for the reply!
I've just checked out some info on memory bus width and it CAN help to have a larger memory bus! The larger memory bus would allow a larger area for the VRAM to pass through and also having a fast memory clock would combine to push the data through the big bus at incredible rates!
The BRP work on the graphics card are usually a few hundred MBs in size and it makes sense for this specific work to have good amounts of VRAM, memory bus width, memory clock speeds and memory bandwidth as those things will help process the WU's faster!
The R9 280 with 384-bit bus, 3GB VRAM, 1250MHz memory clock and 240GB/s memory bandwidth is exactly why it can process 2 BRP6/BRP4G WU's in just 1h30min!
Thanks again I've totally learned something new and will keep this info in mind while searching for a card to get! Maybe HD 7870 or HD 7950 although the HD 7870 has 256-bit bus but both use less then 200W and are slightly lower in price on eBay used than the newer R-series!
Daniel
One other thing to remember
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One other thing to remember is the total number of stream processors, the more the better for processing. Think of a stream processor as a mini cpu core, hence the more mini cpu cores you have on a card the faster it will crunch a unit.
THAT is another reason the 7970 is so fast! Here is a short list I have compiled over time to help me in my purchase making decisions:
ATI 4650 AGP-no 320
ATI 4670-no 320
ATI 4770-no 640
ATI 5550-no 320
AMD 5770-no 800
AMD 5870-yes 1600
AMD 6770-no 800
AMD 6850-no 960
AMD 6870-no 1120
AMD 6950-yes 1408
AMD 6970-yes 1536
AMD 7750-yes 512
AMD 7770-yes 640
AMD 7790-yes 896
AMD 7850-yes 1024
AMD 7870-yes 1280
AMD 7950-yes 1792
AMD 7970-yes 2048
AMD 7990-yes 4096
AMD R7 260x 896
AMD R9 270x 1280
AMD R9 280x 2048
AMD R9 290x 2816
The yes or no means whether the card is double precision or not.
As you can see the 7970 has 2048 stream process, while the 7850 has 1024, which correlates to your chart showing which is faster. Also you can see there is more than one thing to take into consideration when buying a new gpu.
RE: One other thing to
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Hi,
Thanks for the reply! It was very nice of you to post the information on those graphics cards with their stream processors and double precision yes/no ability! Yes, the stream processors are another helpful thing for the WU processing!
Thank you!