CPU Vcore 1.65. Problem?

Typhoon · 14 Mar 2007 at 18:16

Commando CPU Vcore 1.65. Problem - SOLVED!

I am setting up my first water cooled rig and went straight for 3.6GHz with my E6600 (400x9). At the moment I have Vcore set in the BIOS at 1.65v, RAM at 2.1v (800MHZ 1:1) and NB Voltage at 1.4 and eveything seems stable with Prime95. Lowering the CPU Vcore will cause Vista to crash or not load. Temps using Intel TATS is 35 idle and 70 at 100% on both cores.
So to me the max temps seem well with limits (but why the big variation between max load and idle?) and the rig seems stable. So am I going to do any harm running at 1.65v (most people I see are runing 1.4-1.45v). Only ever played with AMD CPU's before so some of this is new to me.

BTW whats VID in Core Temp Beta0.94? It reports 1.325v and Voltage on CPUZ is showing 1.056v?

Cheers

Typhoon · 14 Mar 2007 at 18:50

Cob said:
1.65v is a bit high. Even for water.

What's the best you can do at 1.55v?

I have it at 3.2Ghz (400x8) at 1.60v (BIOS) at the moment and am running Prime95 at the moment. Max Load temps on TATS is down to 61. If its stable I'll try lowering it further

I don't want to fry my CPU but it seems a shame to go for a lower clock when I have it stable higher & within referance temperatures.

Typhoon · 14 Mar 2007 at 19:24

netby said:
I mate

first of all you have a great setup,top quality hardware,but I think it deserves a better PSU
for overclocking and stability of a sistem ,the quality of the PSU is essential

with this kind of hardware,if it was me, I bet in a better PSU with 700/850w from a quality manufacturer

with that cpu,at 400x9, if you need more than 1.5 / 1.55Vcore to get it stable,something is wrong

1.65 Vcore is to much ,even with water
this kinf o Vcore is good for phase change ,with sub- zero temps

only my opinion

Thanks, I was thinking of a larger PSU after geting the GTX, The Hipper was somethng I had, but I hadn't considered that that it may be contributing to the problem. Could it just be down to the CPU, I know they are not all made the same.

Typhoon · 14 Mar 2007 at 20:06

Not sure how much the Vdroop is but I imagine its the same as the other Asus 965 boards. Ok I am down to 1.475v at 3.2GHz (400x8). I am running Prime95 for 30 min and if stable lowering the VCore by 1 step. So it looks like I can get 3.2GHz at a sensible voltage but I need a big jump to to get 3.6 (400x 9). Does this sound like it could be a PSU problem or a CPU problem?

Typhoon · 21 Mar 2007 at 10:08

Just an update guys, I changed my PSU to to an Enermax Galaxy, lapped the CPU heat spreader a bit (it was concave), ditched the the heatpipes from the Noth and south bridges and fitted heatsinks with a fan on the Northbrige. now getting 3.6 Ghz at 1.45v VCore, North Bridge voltage 1.4v in Bios and 56 degress under full load with TATS

Typhoon · 25 Mar 2007 at 19:56

Another update, I fitted a NB water block and added some heatsinks to the VRMs. I did a little more lapping to remove what was left of the Alu on the IHS, and what a differeance its made! Temps under load are now down to 46 degrees at 3.6Ghz (400x9). I even had her at 4.05Ghz but with 1.625V, but still only 60 degrees at full load under TAT. I'm sure I can get the voltages down if I did the Vdroop mod. I have her now settled at 3.6Ghz as this will be a 24/7 rig. I am pretty impressed with the Commando MB now!