Hi, I recently purchased a GTX 470. I was reviewing the Boinc GFLOPS value calculated. So I could add the calculation to my little client_state.xml report program. Comparing the GPU clock speed found in Boinc schedule file to what GPU-z shader clock speed displays. There was a difference GPU-z shows 1215 MHz and Boinc has only 810000 KHz or 810 MHz.
Boinc is basing the peak GPU performance on my GPU idle speed of 810 MHz. Is 810 MHz what peak GFLOPS should be based on? Specs from Nvidia site. GPU Engine Specs: CUDA Cores 448 Processor Clock (MHz) 1215 MHz From boinc sched_request_setiathome.berkeley.edu.xml file: <coproc_cuda> <count>1</count> <name>GeForce GTX 470</name> <req_secs>4519.284587</req_secs> <req_instances>0.000000</req_instances> <estimated_delay>0.000000</estimated_delay> <drvVersion>25721</drvVersion> <cudaVersion>3010</cudaVersion> <totalGlobalMem>1309081600</totalGlobalMem> <sharedMemPerBlock>49152</sharedMemPerBlock> <regsPerBlock>32768</regsPerBlock> <warpSize>32</warpSize> <memPitch>2147483647</memPitch> <maxThreadsPerBlock>1024</maxThreadsPerBlock> <maxThreadsDim>1024 1024 64</maxThreadsDim> <maxGridSize>65535 65535 1</maxGridSize> <totalConstMem>65536</totalConstMem> <major>2</major> <minor>0</minor> <clockRate>810000</clockRate> <textureAlignment>512</textureAlignment> <deviceOverlap>1</deviceOverlap> <multiProcessorCount>14</multiProcessorCount> </coproc_cuda> GPU-Z confirms that with no GPU work unit the GPU will run at 810 MHz. Peak flops using idle 810 MHz No load on GPU 14*32 = 448 * 810000000 = 362880000000 * 2 = 725760000000 or 726 GFLOPS This matches what Boinc found. Peak flops using max 1215 MHz 14*32 = 448 * 1215000000 = 544320000000 * 2 = 1088640000000 or 1089 GFLOPS Difference between peak max MHz and peak idle MHz is 362880000000 or 363 GFLOPS Line from Boinc startup messages. Version 6.10.57 07/09/2010 01:05:25 PM NVIDIA GPU 0: GeForce GTX 470 (driver version 25721, CUDA version 3010, compute capability 2.0, 1248MB, 726 GFLOPS peak) I ran a test as soon as the GPU starts a work unit the GPU does run at 1215 MHz until completed. I used GPU-z to confirm this is what is happening. Thanks, Kevin _______________________________________________ boinc_dev mailing list [email protected] http://lists.ssl.berkeley.edu/mailman/listinfo/boinc_dev To unsubscribe, visit the above URL and (near bottom of page) enter your email address.
