Thanks for the link QuietOC. I see where you are coming from now with regard K8 chipsets. I took a look at the article and something doesnâ€™t add up for me with their figures:
Comparison of AM2 & S939 system power consumption from Techreport.
The values below are in Watts and are for AM2 power consumption â€“ S939 power consumption. i.e. + means AM2 consumed more power, - means AM2 consumed less power. Note: Idle is with CnQ disabled.
ATI CnQ +5.1 Idle +14.4 Load +15
nVidia CnQ -5.4 Idle -25.1 Load +6
The differences at idle when disabling CnQ are puzzling: with ATI, AM2 consumes an extra 14.4W, with nVidia, AM2 consumes 25.1W less. To quote Techreport:
â€˜Keep in mind that because our AM2 platforms are using an underclocked Athlon 64 FX-62, their power consumption results aren't directly comparable to our Socket 939 platforms.â€™
Whatever the reason these figures donâ€™t add up for me. The power differences under load seem less remarkable, as VRM efficiency and motherboard differences could easily produce those values.