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First overclock on 680i, didn't get very far...

post #1 of 11
Thread Starter 
Last night was my first overclock attempt. Before getting started, I updated my BIOS to the latest P30 from evga and I was ready to make some real progress, but I only got to about 3.08Mhz when the crap hit the fan. At this point I only understand increasing the FSB until the pc becomes unstable, then I start increasing the cpu voltage. This seemed to work only once. Maybe I did not increase the voltage enough, I don't know. Here are the numbers, you decide.

My BIOS settings before any OC...

FSB/Memory
FSM Memory Ratio: 1:1 (default)
FSB-Memory Clock Mode: Linked (default)
Memory Mhz: 847.5 (default, linked to FSB)
SLI Ready Memory: Disabled (default)

Clock settings
CPU Multiplier: 11
PCIe: 100

Voltages
CPU Core: 1.21250
CPU FSB: Auto (default)
Memory: Auto (default)

Memory Timings
All on Auto (defaults)

Overclocking results...
Code:
FSB       Core Mhz     CPU Core Voltage   TEMP     Status
1075      2.95         1.2125             43c      OK
1090      2.98         1.2125             43c      OK
1105      3.04         1.2125             44c      OK
1120      3.08         1.2125             45c      OK
1130      3.11         1.2125             46c      CRASH,BSOD 
1130      3.11         1.21875+           47c      OK
1140      3.14         1.21875            48c      CRASH,BSOD
1140      3.14         1.2325+            49c      CRASH,BSOD
1140      3.14         1.2375+            49c      CRASH,BSOD
I have a feeling that maybe I did not increase the voltage enough. Even though I upped a few notches when I started to experience problems at 1130 and 1140, I was still only at 1.2v. When increasing core voltage, what is a good increment value? .025, .05v, or .1?

Thanks
SAFX
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post #2 of 11
THAT IS AWFULLY LOW FOR A VCORE. 1.23, even my system doesnt go over 3.0Ghz with that.

Increase the voltage to 1.30v and try agian. If it fails try 1.38v (do not go over 1.5v or over 60 degrees under load for temperature.
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post #3 of 11
Thread Starter 
I suspected the voltage was the problem. So what do you think is a good increment, 0.5v?

I'll try it again with 1.3v.
Thanks
SAFX
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post #4 of 11
Stock on mine is 1.325! I'm sure yours could take more beeing as its Extreme and all that jazz. =D
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post #5 of 11
I'd go straight to 1.4v CPU vCore, to be honest. You could try lowering your multiplier from x11 to x9 for now, in order to concentrate on the FSB.
post #6 of 11
Thread Starter 
I took your advice and increased the voltage, but unfortunately it did not produce better results. As I increased the voltage the system became more unstable and crashed with BSOD much faster once Windows finished loading.

Code:
Multiplier @ 11
FSB       Core Mhz     CPU Voltage   TEMP     Status
1130      3.11         1.3           50c      OK
1140      3.14         1.3            -       BSOD
1140      3.14         1.35+         52       Unstable, apps crashing
1140      3.14         1.4+          55c      BSOD
Since I wasn't getting anywhere with the voltage, I reduced the multiplier to see if that would help:

Code:
Multiplier @ 10
FSB       Core Mhz     CPU Voltage   TEMP     Status
1130      2.85         1.35           -        BSOD

Multiplier @ 9
1130      2.56         1.35           -        DOES NOT BOOT
I was expecting to reach 3.2Mhz with ease, but clearly that's not the case. There must be something fundamental that I am missing. What else could I tweak?

SAFX
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post #7 of 11
You have to get yourself some aftermarket cooling for your North Bridge/South Bridge. I can't even go past 2.61 GHz with my E4300 despite having very good cooling.
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post #8 of 11
Thread Starter 
Quote:
Originally Posted by Akatsuki No Tobi View Post
You have to get yourself some aftermarket cooling for your North Bridge/South Bridge. I can't even go past 2.61 GHz with my E4300 despite having very good cooling.
What do you mean? What is North and Southbridge?

SAFX
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post #9 of 11
Don't worry about the north/south bridge cooling you should be fine.

First put your RAM into "unlinked" mode, that way you can set your FSB and your RAM independently, don't worry there is no speed penalty for this. Put you voltage to maybe 1.4 or something like that.
    
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post #10 of 11
Thread Starter 
Quote:
Originally Posted by trueg50 View Post
Don't worry about the north/south bridge cooling you should be fine.

First put your RAM into "unlinked" mode, that way you can set your FSB and your RAM independently, don't worry there is no speed penalty for this. Put you voltage to maybe 1.4 or something like that.
If I unlink the FSB ad RAM, do I start adjusting the RAM speed too, and how is that done? I mean, I know how to change the speed in the BIOS, but is there a convention for doing it in relation to other settings such as the FSB?

Raffi
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