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I have a (as in factory specs) 3.6 GHz AMD FM2 A8-Series A8 5600K CPU and There is at lease 0.2 GHz difference between hardware reports in Windows and Linux.
I was tested on:
- Win7 ultimate x64 & x86 ( both tests for 3.4 GHz )
- Win8.1 Pro x64 & x86 ( both tests for 3.5 GHz )
- Ubuntu 14.10 & 14.10.1 x86 & x64 (tests were right its 3.6 GHz )
- Linux Mint 17
- x86 & x64 Mate tested for 3.55 GHz
- x86 & x64 Cinnamon were right for 3.6 GHz
I know the the CPU and my ASROCK motherboard available to OC (OverClock) but its not enabled so I think it does not effect on HW tests.
Anyone has an idea if its a sign for broken Hardware or just some OS stuff?
I can confirm that this happens on Windows 8.1. I have a Core2Quad 2.44GHZ overclocked by 15% and it shows as 2.35GHZ on Task Manager. On windows 8, the problem happened too. – Ismael Miguel – 2014-12-14T19:40:41.583
Yeah i know that windows used to 'cheat a bit' on hw info but on linux i have never noticed it. On my laptop (1.95 dualcore cpu) linux were tested 1.95 and window 1.8) – Dániel Sebestyén – 2014-12-14T19:44:32.837
Sadly, Windows 8 isn't perfect on this one. I don't know how a system can fail such a thing. – Ismael Miguel – 2014-12-14T19:55:49.437