Author: Mike Byrne
Date: 13:47:46 03/06/05
Crafty vSE/64 19.19 (1 cpus) (Using the freeware utility "ClockGen"that allows one to change the clock speed on the fly. Note: Be very cautious with this utility. Running your machine at other than your machine's rated speed could lead to your machine totally inoperable. Use at your risk, in no way shape or form, would I be responsinble if you this utiility and destroy your perfectly good computer. Recovery methods may include resetting the BIOS by shorting the CMOS jumper, and reformatting and reinstalling operating system software. If you damage the processor, memory or motherboard, you system may not be recoverable. Not all systems respond favorably to this utility. SATA drives are especially noted for becoming unstable in an overclock environment and may require reformatting to recover. Ok - as it happens , my machine (Dual Opteron 244) , bears no illwillto this little speed changer, My machine is rated at 1.8 Ghz. I started the test at 1.6 Ghz and work my way until the system crashed at around 2.1 Ghz. White(1): # clock 1601.13 Total nodes: 95319596 Raw nodes per second: 1562616 Total elapsed time: 61 SMP time-to-ply measurement: 10.491803 White(1): # 1652.68 mhz Total nodes: 95319596 Raw nodes per second: 1615586 Total elapsed time: 59 SMP time-to-ply measurement: 10.847458 White(1): # 1702.36 Mhz White(1): bench Total nodes: 95319596 Raw nodes per second: 1672273 Total elapsed time: 57 SMP time-to-ply measurement: 11.228070 White(1): # 1749.83 Mhz White(1): bench Total nodes: 95319596 Raw nodes per second: 1733083 Total elapsed time: 55 SMP time-to-ply measurement: 11.636364 White(1): # 1800.51 Mhz White(1): bench Total nodes: 95319596 Raw nodes per second: 1765177 Total elapsed time: 54 SMP time-to-ply measurement: 11.851852 White(1): # 1850.62 mhz White(1): bench Total nodes: 95319596 Raw nodes per second: 1833069 Total elapsed time: 52 SMP time-to-ply measurement: 12.307692 White(1): # 1902.63 Mhz Total nodes: 95319596 Raw nodes per second: 1869011 Total elapsed time: 51 SMP time-to-ply measurement: 12.549020 White(1): # 1951.90 mhz White(1): bench Total nodes: 95319596 Raw nodes per second: 1906391 Total elapsed time: 50 SMP time-to-ply measurement: 12.800000 White(1): # 2001.41 Mhz White(1): bench Total nodes: 95319596 Raw nodes per second: 1985824 Total elapsed time: 48 SMP time-to-ply measurement: 13.333333 White(1): # 2053.76 mhz White(1): bench Total nodes: 95319596 Raw nodes per second: 2028076 Total elapsed time: 47 SMP time-to-ply measurement: 13.617021 System crashed @ 2100.48 Mhz. A different verison of Crafty with "futility" obtained the best bench in terns of nps of 2109468 at 2096.16 Mhz. The system will freeze eventually at this speed. Highest stable speed for this Opteron 244 is 2050 Mhz. For safety, I run it at 2041.68 (FSB=226.85). The AMD CPUID.exe utility shows it running at 2074 Mhz with that setting - I'm not sure why the diffennce between the two.
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