Contribute
Register

Multiplier wont go above 27 on 990x

Status
Not open for further replies.
Joined
Feb 3, 2011
Messages
112
Motherboard
Mountain Lion 10.8
CPU
990x
Graphics
EVGA GTX 680 OC
Mac
  1. MacBook Pro
Classic Mac
  1. 0
Mobile Phone
  1. Android
Sorry if this has been resolved before but I have a questions regarding multipliers and why OSx doesn't always follow the MB and CPUs stages and kind of randomly picks its own.

My system is:
Asus p6t Deluxe v2
intel 990x 6 core processor overclocked to 4.41 ghz

CPU bios settings:
c1e - on
Speedstep - off (ON results in 1800 GB score and the multiplier still only hits 27 during stress testing)
c6, c3 and c1
a20m - off

My DSDT supports up to 16 threads

The Problem:
my multiplier wont go above 27 for 3.6. I don't get it. x58 don't need an ssdt so why is it not reading the multiplier tables right and stepping up to 4.4? It does on the windows side.

PS: Lion saw my chip as a 6 core xeon. Mountain Lion says 3.6ghz unknown.

Any advice would be greatly appreciated. I want to break that 20k mark and squeeze out that remaining 800mhz
 
Any news on this guys? Sorry, I've been trying to figure it out for a few weeks with no luck :(
 
No modified kext related to the power management in S/L/E ?

Try to increase your BCLK (probably around 200 for your board)

I was on SL at this time, and past 4,3 GHz : KP KP KP

My (old) geekbench score (204X21) : http://browser.primatelabs.com/geekbench2/845147


You don't need a SSDT ; Boot.plist : GeneratesC/Pstates=Yes ; if my memory serves me right, even if you disable the speedstep in the BIOS, chameleon will overide it.

Hope this helps.


EDIT : you should try to disable EIST and C1E too.
 
Any progress on this? I have a 990x on a X58A UD3R board, similar issues.
 
Status
Not open for further replies.
Back
Top