Why does a GPU uses more FLOPS then a CPU, for the same job?

Questions and Answers : GPU applications : Why does a GPU uses more FLOPS then a CPU, for the same job?
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Author	Message
Fred J. Verster Volunteer tester Send message Joined: 21 Apr 04 Posts: 3252 Credit: 31,903,643 RAC: 0	Message 979987 - Posted: 17 Mar 2010, 15:19:18 UTC Looking at some fresh result's, I noticed, all WU's crunched by a CUDA device, display more(~5%-10%?) FLOPS, compaired with a CPU, on the same WU. F.i.this one , and this one, crunched by a CPU! But also stock, compaired to optimized CUDA Can anyone please (try to) explain, this, IMO strange fact. Or has this to do with parallel (pre-)processing? Since this CUDA proc. is much faster, 2x -50x, then CPU proc. a 10% increase in FLOPS, can be ignored,IMO. ID: 979987 ·
popandbob Volunteer tester Send message Joined: 19 Mar 05 Posts: 551 Credit: 4,673,015 RAC: 0	Message 984636 - Posted: 28 Mar 2010, 1:14:58 UTC I believe the reason behind it is the CPU can do some calculations in a single calculation which the GPU has to do in a couple. It would be like asking the CPU to do 2x2 it would figure it out with one calculation of 2x2=4 where as the GPU would have to 2x2= 2 groups of 2 means 2+2=4 (2 calculations) That's obviously not a true case but I'm sure you get the idea. Bob Do you Good Search for Seti@Home? http://www.goodsearch.com/?charityid=888957 Or Good Shop? http://www.goodshop.com/?charityid=888957 ID: 984636 ·
Fred J. Verster Volunteer tester Send message Joined: 21 Apr 04 Posts: 3252 Credit: 31,903,643 RAC: 0	Message 988881 - Posted: 13 Apr 2010, 12:36:40 UTC - in response to Message 984636.   First, sorry for my very late reply, as the question itself was a bit stupid. The GPU will work as a kind of secondary processor, together or after some (pre)calculations, have been done by the CPU, IMO. ID: 988881 ·
bloodrain Volunteer tester Send message Joined: 8 Dec 08 Posts: 231 Credit: 28,112,547 RAC: 1	Message 991271 - Posted: 23 Apr 2010, 2:15:41 UTC - in response to Message 988881.   i forgot but their was a dam good article about this. if i remember link i will post it or pm you. ID: 991271 ·

 
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