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water-cooling voltage
- Thread starter Jibby
- Start date
- Joined
- Jul 24, 2002
- Location
- Seattle, WA
It's in my sig, but no detailed info.
I'm usually willing to run as high as 2v actual, but it's been hard to realize. Voltages get a little unstable on my NF7-S. Watercooling is down now, but I was running that for a good 8 months or so.
Watercooling will soon consist of (when it's back up) of a DTek Spir@l CPU block, 2x chevette heatercores, and a Mag3 pump.
I'm usually willing to run as high as 2v actual, but it's been hard to realize. Voltages get a little unstable on my NF7-S. Watercooling is down now, but I was running that for a good 8 months or so.
Watercooling will soon consist of (when it's back up) of a DTek Spir@l CPU block, 2x chevette heatercores, and a Mag3 pump.
What a coincedence, my watercooling is also down for overhauls and upgrades 
I ran my 1800+ at 2.06 in the ABIT NF7-S BIOS - which means about ~1.96V aveerage actual Vcore. The NF7 undervolts like a crazy Leafs fan, and mine needed the L12 mod to get above 1.85V actual stably.
A good rule of thumb is to just gauge it by your temperatures - below around 50 degrees celcius is a "safe zone" in my opinion - although with high voltages, and high overclocks a better goal is sub 40 degrees celcius.
The other part of it is finding your brick wall. The better cooling you have, the lower a Vcore you will need for any given overclock to be stable, and at a certain point temperatures and voltage increases exceed a "safe" amount per MHz raised. My wall with my (old) water system was about 1.9-2.0 actual Vcore, after that a 10 MHz raise came at the cost of a comparatively huge overvolt, and a skyrocketing temperature.
To put it in layman's terms the cooling reaches a point where it cannot "handle" the Voltage, although it is a bad way to put it because the processor factors in as well.
I ran my 1800+ at 2.06 in the ABIT NF7-S BIOS - which means about ~1.96V aveerage actual Vcore. The NF7 undervolts like a crazy Leafs fan, and mine needed the L12 mod to get above 1.85V actual stably.
A good rule of thumb is to just gauge it by your temperatures - below around 50 degrees celcius is a "safe zone" in my opinion - although with high voltages, and high overclocks a better goal is sub 40 degrees celcius.
The other part of it is finding your brick wall. The better cooling you have, the lower a Vcore you will need for any given overclock to be stable, and at a certain point temperatures and voltage increases exceed a "safe" amount per MHz raised. My wall with my (old) water system was about 1.9-2.0 actual Vcore, after that a 10 MHz raise came at the cost of a comparatively huge overvolt, and a skyrocketing temperature.
To put it in layman's terms the cooling reaches a point where it cannot "handle" the Voltage, although it is a bad way to put it because the processor factors in as well.
- Joined
- Apr 12, 2003
- Location
- Great NorthWest
on my abit rig, I run the voltage @ 2.03volts (1.98 - 2.01 actual)
running a dual loop system...L30-120.2-RBX-res on the cpu side.
running a dual loop system...L30-120.2-RBX-res on the cpu side.
- Joined
- Jul 24, 2002
- Location
- Seattle, WA
Yeah. Like I've told people, once you start pushing past 1.85v (and even crossing the 1.7v line, to a lesser degree) temperatures just start shooting up. With my lapped Spir@l, single chevette core, and Danner Mag 3, I still hit 45C load at 1.95. Pushing past that...stuff starts to get really warm.
- Joined
- Dec 28, 2001
- Location
- Corner of No and Where
XP 1600@2013 (Pally core)
Epox 8K3A+
1.93 volt vcore
Cascade
Eheim 1250
Chrysler heater core- 12"x6"
1/2" ID tubing.
cpu temp 38c currently
I have run this chip at considerably higher voltages: I was @ 2.1volts for about 6 months and 2030 or so mhz.....but the mobo blew up!
I had to scavenge 8 capacitors and a choke coil (or what LOOKS like one) from a dead mobo to resurrect it.
Since then it has been running fine and at reduced voltages for the same oc.
Voltage increases are a good thing up to a point, but then you start hitting Diminishing Returns. I can currently run stable @2030 or so with about 2volts on the vcore, but there is little difference in performance and a larger difference in temps.
And past yet another point, it does not matter HOW good your cooling is: components will die.
Epox 8K3A+
1.93 volt vcore
Cascade
Eheim 1250
Chrysler heater core- 12"x6"
1/2" ID tubing.
cpu temp 38c currently
I have run this chip at considerably higher voltages: I was @ 2.1volts for about 6 months and 2030 or so mhz.....but the mobo blew up!
I had to scavenge 8 capacitors and a choke coil (or what LOOKS like one
) from a dead mobo to resurrect it. Since then it has been running fine and at reduced voltages for the same oc.
Voltage increases are a good thing up to a point, but then you start hitting Diminishing Returns. I can currently run stable @2030 or so with about 2volts on the vcore, but there is little difference in performance and a larger difference in temps.
And past yet another point, it does not matter HOW good your cooling is: components will die.
- Joined
- May 1, 2003
- Location
- Seattle
bucken77 said:
Man and you run a Cascade SS right?
Hey put that mother of a block to good use.
- Joined
- Jul 17, 2002
- Location
- In a Room Heated by Electronics
For Intel Above 1.7 is prob not a very good idea, but i would mess with 1.75 if i had too
