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View Full Version : Ever overclock with a LOWER voltage?


sillyeagle
02-09-06, 04:47 PM
This 3700 San Diego that I have has a stock voltage of 1.4, as opposed to 1.3v on most other 90nm chips.

I've only done some mild overclocking with it so far, but I took it up to 2.4Hz, from 2.2GHz, and didn't realize until later than I accidentally had the voltage at 1.35v.

With a mild 10% OC, I was surprised how cool it ran with that voltage, 30 at idle, and 36 under load.

So can a lower voltage ever be useful in overclocking as far as creating a lower temp? It has in this case but I would have to assume when I take it up to around 2.6GHz or more I will actually need that extra voltage.

By the way, are those temps pretty good for a 10% OC on a 90nm A64?

Roliath
02-09-06, 05:18 PM
Yup, some cpus don't respond too well to voltage.
My 3700+ was clocked at 2.7Ghz with 1.35vcore (set in bios) which windows report to 1.393~
Its a "little" lower than stock.

sillyeagle
02-09-06, 07:14 PM
Well so far I'm up to 2.7GHz and still running cool, 32 at idle and 43 under load. Thats still with the 1.35v.

ViN86
02-09-06, 07:21 PM
nice temps, nice voltage, nice OC. :thumbsup:

j0j081
02-09-06, 07:27 PM
I oc my clawhammer as much as I can before having to raise the voltage for stability. Does seem to keep it cool regardless of the increase in clock speeds.

sillyeagle
02-09-06, 08:03 PM
Well I made it to 2.75GHz with the less-than-stock 1.35v, 32 idle and 43 load. To get into windows and run benchmarks at 2.8GHz I had to go to the stock 1.4v. Now I'm at 2.86GHz with 1.45v.

I'm a bit worried about how high I can go with the voltage on this, maybe 1.5 or 1.55? What do you think?

Roliath
02-09-06, 10:22 PM
As long as temps stay within reason (under 50c, imo), but i wouldn't go more than 1.55.

thats what i'm pushing through my 175, and my temps never go above 53c.

BTW: what stepping and week/code is your sandy?

jAkUp
02-09-06, 10:25 PM
I'm a voltage wh0re. I know that some memory overclocks better with lower v, but I don't think a CPU would benefit much from lower v.

Dudes__Geof_
02-09-06, 10:30 PM
Sometimes there can be instability caused by lower voltages, if it's just fine it's just fine.

CaptNKILL
02-09-06, 10:42 PM
Jesus, I didnt know people were so conservative with the voltage... Im running at +.30 in my BIOS. My Epox USDM software shows it 1.62-1.65 most of the time. I wonder how long till this thing pops :o

Its running at 43C right now with the stock heatsink... these Venice cores are amazing :)

sillyeagle
02-10-06, 03:12 AM
BTW: what stepping and week/code is your sandy?

Hmm not sure, where would I get that? I didn't happen to get anything off the chip before I installed it. I ordered it off New Egg third week in January if that helps.


My Epox USDM software shows it 1.62-1.65 most of the time. I wonder how long till this thing pops.

I was planning to leave it at the stock voltage and take whatever I get, but it was interesting to see how high it could go. But I didn't go above 1.45v, just because I want it to last as long as possible.

At the stock 1.4v it seems to be ok at 2.8GHz, with an Arctic Freezer 64 Pro, which I really like. Its silent, mounts to the stock mount, and it even cools the heatsink for the heat pipe on my MBD.