Quick 3930K question RE: VCORE

Yaayuh!

Yaayuh!

Yaayuh!

Soldato
Joined
5 Nov 2010
Posts
24,609
Location
Hertfordshire
RE: 3930K Voltage

What voltages do you require for 4.5GHz / 4.6GHz stable (prime 30mins or general gaming etc)

I seem to require:

1.36v for 4.4GHz
1.4v for 4.5GHz
1.425v for 4.6GHz

I am 80% sure my chip is either rubbish or degraded. I just wanted to check with you guys.
 
Last edited:
Looks about average to me, I'm sure most 3930's I've seen north of 4.7-8ghz have been using over 1.45v.
 
Just had a quick go on my 3930k

It was stable @4.6 with 1.32v
I did run it @4.6 with 1.3v, it ran for about 5mins then bsod 124

On my 3960X and 3970X I have not tested it with prime95 but going on other things I have used them for, they need close to 1.4v @4.6

I think looking at your volts they look about average, maybe you could improve things with a custom water loop.
 
pgi947 said:
Looks about average to me, I'm sure most 3930's I've seen north of 4.7-8ghz have been using over 1.45v.
Click to expand...

The above is about what my 3960X and 3970X use, they need 1.52v @4.9 to get them through the Physics tests on the 3dmark benches.
 
Cheers guys, much appreciated.

Custom water loop you say?... Hmm...Unfortunately i don't think i can put up with the maintenance also i tend to move my rig around a bit. Unless you can persuade me otherwise.
 
Custom water isn't really high maintenance as long as you are careful when you spec up and build. On my old WC system cleaning dust out of the rads was the most it needed but on the new one I spent some time balancing the air flows and used filters so it's pretty good.

I think with the kit and especially the fluids you can get now it's taken a lot of the basic issues out of the custom water arena you just need to spec up and pick the right mix of components.

On the voltage question, have my 3930K @4.8GHz using 1.375V. Under load it drops to 1.368V and that's the lowest it's totally stable at, one notch lower and it's OK in windows but BSOD's on stress testing. Have not tried any higher clocks yet but hope it will do 5GHz @1.4 (ish) :)
 
Last edited:
WC maintenance isn't much different to air maintenance tbh, as mentioned above clean the rads out once in a while, change fluid every 6-12 month's or if like me change when you spontaneously change components every few months :p

You really don't have to be so anal with voltages under water either.
 
I tend to move my PC about a bit so never really thought of going with water, also having to drain, flush and refill once or twice a year i don't want to have to do.
I have a H100 at the moment, will probably upgrade the fans at somepoint and ramp up the voltage as required.
80c+ in prime95 but i'm not going to be sitting there on Prime every day am i, so not really and issue.
 
Fair point if you're moving it about often, the last thing you want is a cracked res or something!!

Stick some gt1850's on a h100 :)
 
Think i'm going to have to start overclocking from scratch or something.

4.44GHz (44x101) @ 1.37v = Stable. Ran Prime95 for over an hour as a quick test
If i increase the ratio to 45 it's not stable, even up to 1.42v now.... fails PRIME after about a minute...

There is a very strong wall here for some reason and i don't know why.. I can't help but think there is something limiting the power. Though the current capabilities are up high, 120% or 130%, doesn't make a difference.

:(
 
Last edited:
I've settled for 3 profiles:

1. - Super Stable and cool
CPU @ 4.44GHz (44x101) @ +0.050 offset
RAM @ 2155MHz 9,10,10,21,1T,88 tuned second and thirds

2. - Normal Stable but a bit warm (in prime95 that is..)
CPU @ 4.5GHz (45x100.10) @ +0.095 offset
RAM @ 2135MHz 9,10,10,21,1T,88 tuned second and thirds

3. - Bench
CPU @ 4.64GHz (46x101) @ 1.425v static voltage
RAM @ 2155MHz 9,10,10,21,1T,88 tuned second and thirds
 
whyscotty said:
For 4.6 I use 1.35v and this is game stable, I don't play Prime :D
Click to expand...

If it's not prime stable you may get massive crashes while playing massive 12 hours gaming marathon's in MMO's or first person online games :P I found prime stable to be important for more cpu intensive games like Battlefield 3 or even l4d2 which would crash when all games otherwise would be fine. There is nothing to show that the cpu is not erroring even though your games may not be crashing.
 
Rossi~ said:
Next to none, i have LLC set to medium and it's an ASUS board (Sabertooth).
Click to expand...

Have you tried overclocking without using LLC, my 3930k/RIVE can get quite a bit a vdroop but does not need any LLC to get a good overclock on low volts.

My 3970X/RIVE has less vdroop but need LLC set to medium to get an average overclock and also needs a fair bit more volts.

I have found LLC can help a little bit, but sometimes it does not make much difference even if you have vdroop.
 
Kaapstad said:
Have you tried overclocking without using LLC, my 3930k/RIVE can get quite a bit a vdroop but does not need any LLC to get a good overclock on low volts.

My 3970X/RIVE has less vdroop but need LLC set to medium to get an average overclock and also needs a fair bit more volts.

I have found LLC can help a little bit, but sometimes it does not make much difference even if you have vdroop.
Click to expand...

I've spent hours on this chip trying all different methods. It appears that 4.5GHz is the stable limit without venturing into full blown water cooling.
 
horrorxpunk said:
There is nothing to show that the cpu is not erroring even though your games may not be crashing.
Click to expand...

Even so, you could run Prime for 12 hours, deem it stable but could have fallen head over bum at 12 hours and 1 minute.

I think Sin0822 says it best:

Stability is subjective, some might call stability enough to run their game other like folders might need something that is just as stable as it was at stock, and then they would need to run Prime95 for at least 12 hours to a day or two to deem that stable. There are stability clubs and they require 12 hours or so of Prime95. There are benchers who really don’t care for stability like that and will just say if it can bench a benchmark it is stable enough. No one is wrong and no one is right. Stability is subjective. 24/7 Stability is not subjective.
Click to expand...
 
You must log in or register to reply here.
Back
Top Bottom