How much voltage is too much???

N

Nikhil

Explorer
As some of you guys know, I have been oc'ing a lot....

My reasoning relating to the max voltage is like this ---

Why do people use Water cooling, LN2 cooling etc.....???? to oc better. How do they achieve this??? By increasing the voltage to insane levels. As an example --- like 1.8V on a Winnie ........ Of course, this sort of voltage may not be safe in the long run but it is enough to run some benchies and all that./..... They can afford to increase the voltage so much because they have efficient cooling and all that.....

So, now, I have a bad oc'ing Winnie. It does 2.45 GHz at 1.6/1.584 V. I have an XP-120 with a 75 CFM 120mm fan. I also have positioned a table fan to blow air directly at the side of the open cabinet.

Now, assuming that I can control the temps to be les than 50 deg C(load), then it is safe for me to increase the temps to 1.7 V right??? ONLY for benchies and taking screenies.

And say I allow temps to even reach 55 deg C (load), even then it is ok right???

What I am trying to ask is this --- Is it safe for me to increase the voltages to very high levels(1.7/1.8 V) if I manage to keep my Winnie within 55 deg C Load...

WOTSAY???

Please give your opinions.
 
Its old say in overclocking community. Its not the temperatures but its the voltages that kills.
The higher voltage causes much more damage than higher temps.
1.7-1.75 would be max, i mean really max i would suggest anyone on winchester. 1.7V should be ok even for a longer run.
Make sure you have quality PSU and you dont have too many voltage fluctuations.
 
Then why do people use extreme cooling??? Coz even with Water cooling, the temps will be pretty low.... what is the use of extreme cooling like Phase Change, LN2, etc...

Nikhil posted 6.98 minutes later:

Abt the PSU --- I have a Powersafe 500 watts.... how do I know if my PSU is good enough or not?? And what are the effects if my PSU does fluctuate a lot???

12V:11.551/11.369
5V:5.16/5.187
3.3V: 3.376/3.36

sometimes, the 12V line goes down to 11.1.... is that bad??? How bad??? what if it happens when I am oc'ing????
 
There is a limit to watercooling too.
Subzero temps are used to push the system to extreme for short period of time.
Subzero temps means extreme low resistance to the electrons. So chip can be pushed higgher than usual.
Not all processors like subzeros. Winnies dont like subzero temps.
P4 loves subzeros. Newcastle also does preety well with those.
Its preety complicated stuff. I have given it a unsuccessful try with the dry ice once. Never bothered to try again. Inside of me wants to do it but it needs lots of money, time and investment.
I was planning to give it a shot with Liquid N2 again. But resources are not easily available here.
 
u measuring the PSU voltages using DMM? if not do so and check if the Vg drops.. the error cud be b'coz of erratic sensors and even more erratic software..

TheMask posted 1.13 minutes later:

ABout how high on Vcore u cud go, Funky has made a very nice reply :)
It involves lotsa semiconductor characteristics of silicon and transistors.. DJ is perhaps the best guy to enlighten us all ;)
 
Asus probe aint all that reliable.. if the 12V rail Vg drops to 11.1V only for a few moments then u need not worry.. as long as u r relying on Asus Probe.. the same asus probe reports some ridiculous momnetary values for fan speeds .. sometime +25k n sometimes -25k.. so i dont trust it at all.. :P

use a DMM and closely monitor the Vg.. if the Vg Drop is sustained over longer periods its time u bot a new PSU :P

TheMask posted 1.63 minutes later:

Asus Probe reads the 12V rail Vg on my TP480 as 11.71V.. DMM shows 11.94V.. same with the 5V rail too.. :D and i trust my DMM more ;)
 
Vg = Voltage
u still havent answered how long the 12V rail Vg stays at 11.1V.. if it happens very often then use a DMM to measure the Vg on the Molex connector (u know u shud really have read that Guide from sunny boy :P )..
 
Will read the guide now!!! Thanks..... And keep the replies coming guys..... HOW MUCH VOLTAGE IS TOO MUCH???

Nikhil posted 1.08 minutes later:

And the 12V rail does not stay for long at 11.1 V. It happens just ionce in a way and for a few minutes at a time....
 
for winchester and venice i will say 1.7v max generally speaking with normal good aircooler.
With water maybe 1.75. I think exceeding 25% increase is dangerous atleast for Winchesters and Venice which are low voltage chips.
All this provided you are able to control temperatures.
I have seen people running them at 1.85v but with some state of the art cooling.
 
TheMask said:
Asus Probe reads the 12V rail Vg on my TP480 as 11.71V.. DMM shows 11.94V.. same with the 5V rail too.. :D and i trust my DMM more ;)
Click to expand...

Probe and MBM reported my TP480's 12v as 11.91 - I took the reading with 2 DMMs and both report it as 12.04 - so I modded MBM to show the correct voltages. Easily done - just mode the Voltage.ini file in the MBM's DATA directory.
 
I've a TP480. I've set the vCore to 1.5 in the BIOS. Am running a 3200+ Winnie at 2320 MHz on an A8N-E. But I see from AiBooster and Hardware Sensors Monitor that the vCore keeps fluctuating between 1.49 to 1.54v. Most of te times between 1.49 to 1.52v and very rarely to 1.54v. Anything wrong in this picture ?
 
yeah but B'lore is a BIIIIG city....

Anyway we are going too much off topic.....

Guys, please continue to give your opinions.... I see Deejay is viewing this thread.... waiting for your reply DJ.....
 
dude..try the max voltage in the BIOS....

before doing that, let the com run at default volts for about an hour...then crank the voltages...do the ocing asap...thats how i do it ;)
 
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