Quote Originally Posted by jasonelmore View Post
jcool has been hating on the i7's turbo mode. He came over to saaya's vtt thread and called me out on having 21X200 in my sig. "you know your not really running at 4.2"

no shirlock

and the multi is 20, not 19
Actually depending on how your bios is setup, you may be at actual 4.2. When running prime since all 8 threads loaded, if you are still at 4.2ghz, then you are at 4.2ghz. Or put it this way, any app you run on your computer will be at 4.2 ghz speed, hence it would be incorrect to say 4ghz. No difference to apps running with an i940 set to 21x200 with turbo off vs i920 21x200 with turbo on, if TDP/core limit is disabled in the bios and cpu is in permanent turbo mode.

On GB F3 bios TDP/ core limit is in effect so 4ghz turbo on = 4.2 ghz 2 cores load, 4ghz 4 cores load.
All GB f4 bioses have TDP/core limit disabled so turbo on = permanent 21x multi on i920, permanent 23x multi i940.

What is nice about permanent turbo, it takes a few notches less vcore to do 4.14 with "permanent" turbo enabled vs 4.14 with no turbo. On my i940: bios F4j
1.35vcore bios = 4ghz 182x22, 12hrs prime stable turbo off
1.42vcore bios = 4.14 ghz 188x22, prime stable 4hrs (did not try longer), fails below that, turbo off
1.381 vcore bios = 4.14 ghz 180x23, prime stable 6hrs so far, turbo on (perma-turbo bios)
Just because it takes less vcore for all your apps and computer to always run at 4.14 or 4.2 with turbo on (in TDP/core limit disabled bioses), does not mean you are not at that speed, it just means you got there with less vcore.