i7 920 - hit a wall

Akempster

Akempster

Akempster

Associate
Joined
16 Dec 2009
Posts
330
Location
Birmingham
Hi everyone,

im o/cing my i7920 on a gigabyte ud5.

Currently i have a bclk of 133 (totaling 3.08GHz). However, raising it anyfurther will cause it to crash (i.e. to 134). Temps are on average of 60 C at 22 C ambient but it is still blue screening on prime at any higher rate. i have increased the VCore which hasn't had an affect, reduced RAM speed to under manufacturer settings (samsung standard 1gb sticks @ 1333) I have also increased RAM voltage and the QPI voltage and speeds as i know these are automatically changed when the bclk is increased.

I am running on air but the comp pushes just under 600cfm and case temps are quite low. All temps indicate i should be able to get more out the CPU.

I suppose to get to the point, my question is what should i look at next to further increase the CPU speed?
 
Try a more systematic approach, it's always helpful to 'gauge' the limits of each component (CPU, RAM, mobo) is relative isolation to get a better picture of what's holding you back.

Start by underclocking the CPU and the RAM and push the FSB up until you hit difficulties, then go further with -reasonable- volt increases. Do the procedure for all 3 components and hopefully you'll be able to figure something out.

But its also entirely possible that you were quite simply unlucky with one or more of your components. Still, better than just guessing blindly.


- Ordokai
 
Last edited:
both set to auto setting which is currently at 1.5V for the RAM and 1.232V for the CPU.

im gonna have an attempt at the systematic approach suggested by ordokai and ill post back with results
 
just found something odd: the qpi link speed was automatically set to 5.9GHz. After setting this down to slow mode (runs at around 78 MHz) i can increase my bclk without prime causing a crash. Question is why does it set it so high and is there a middle ground that i can set it too as i cant seem to do this (just gives me a list of speed multipliers)??
 
Set the RAM voltage to 1.64V and the CPU voltage to 1.2V and see how you do from there.

I'm betting the low RAM voltage was your problem before.
 
allows the cpu to be more stable at higher speeds, but I see my i7 as being powerful enough @ stock, and yes, I do game with it :)
 
Ryan-3 said:
allows the cpu to be more stable at higher speeds, but I see my i7 as being powerful enough @ stock, and yes, I do game with it :)
Click to expand...

Well yeah, but unless you have a real lemon of a chip, you should be able to hit 4ghz with HT enabled easily.
 
going good so far - im currently testing at 3.3GHz and will keep going till i cant go no more. Do ya think 4.3GHz is possible on air?
 
using an akasa nero and is pushing through a fair wad of air (see first post). I use it for programming, video and photo editing as well as my games so any room i can get would be handy.
 
True, 4.3 is pushing it on air, but around 4 is very much achievable with those chips conventionally, dare I say commonplace even.


- Ordokai
 
You must log in or register to reply here.
Back
Top Bottom