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LOSTCIRCUITS
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| AMD Athlon64 "Venice" May Low Power be with you! | |
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(Review by MS May 2, 2005) |
| AMD Athlon 64 4000+ |
Windows Idle vs. Load
Windows XP has power savings features built in, similar to the CPU-IDLE and CPU-COOL features known from the Windows 9X environment as part of the ACPI feature set. Cool'N Quiet was disabled in the BIOS to disallow change in core frequency.
Power consumption [W] after several minutes of idle time
At least the Clawhammer and Newcastle numbers are consistent with the AMD tech specs. The Venice and Winchester numbers appear a bit low but are within the reach of possibilities.
Sandra Burn-In test with alternating runs of of the Arithmetic and Multimedia benchmarks. In general, the Arithmetic CPU test draws quite a bit more power than the multimedia test. Note the increase of power consumption over 5 iterations of the burn-in test until thermal equilibrium was reached (we ran 10 iterations in each case but after the 5th run, the results stabilized). We also see the same rather dramatic difference between the 90 nm and the 130 nm cores, in this case, though, the Venice and Winchester cores are indistinguishable from each other (except for the first Multimedia run). Clawhammer (2400): red; Clawhammer (2200): pink; Newcastle (2400): green; Venice (2400): blue; Winchester (2200): turquoise.
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Athlon64-3500+ (Venice Core) |
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