Vcore check on 3930K @ 4.6Ghz

OC2000

OC2000

OC2000

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Hi,

I have just upgraded from an i7 2700 which was overclocked 24/7 at 5ghz to a 3930K

I have spent about 30 minutes overclocking it using only the basic features, wont go higher until I have read more about overclocking on an Asus RIVE.

Everything is on auto except the Vcore is on an offset of -050 and the LLC is on high, Hyperthreading enabled

Ram has been set to 1866 - 9-11-10-1

http://img217.imageshack.us/img217/559/3930k46.jpg

The Vcore under load fluctuates between 1.25 - 1,265 and spikes at 1.28, but so far stable as a rock using intel burn test which is more aggressive than prime95

My i7 2700 required about 1.31 Vcore for a 4.6 overclock, so it seems to be better so far.
Is this Vcore considered normal for this speed for a 3930k?
 
OC2000 said:
Hi,

The Vcore under load fluctuates between 1.25 - 1,265 and spikes at 1.28, but so far stable as a rock using intel burn test which is more aggressive than prime95
Click to expand...

Wouldn't take that for granted. IBT may seemingly put a higher load on CPU, but there have been numerous times I was able to pass IBT, but BSOD within minutes of Prime small FFT's.


If I remember correctly, I needed around 1.28V for 4.6. I think yours are probably a bit better than average - and with those temps, you could probably make it up 4.8 without much trouble.
 
eyetrip said:
Wouldn't take that for granted. IBT may seemingly put a higher load on CPU, but there have been numerous times I was able to pass IBT, but BSOD within minutes of Prime small FFT's.


If I remember correctly, I needed around 1.28V for 4.6. I think yours are probably a bit better than average - and with those temps, you could probably make it up 4.8 without much trouble.
Click to expand...

is it not the different way around i thought :confused: ibt more demanding then prime? or i was wrong
 
Update:

Not sure if it was due to it being a brand new chip, but after 12 hours of running flawlessly, it suddenly BSOD on idle!! and wouldnt last 1 second at that vcore anymore unless i set the multiplier to 45 in which it becomes stable again.

I have never seen a chip degrade so fast.

I have had to increase the Vcore now to 1.28 with an ultra high LLC which spikes at 1.32 to keep it stable.

I just hope the CPU doesnt degrade further on such low voltage. I always assumed it degraded on Voltages above 1.4 on extreme overclocking.
 
Further Update...


Just realized after reading on forums that the RIVE has a problem with coming out of sleep and no matter what you do, until the computer is physically turned off, it will not stay stable.

The problem started after my computer came out of sleep yesterday, and without turning the computer off, i tried fixing it by increasing the VCore.

I have just managed to replicate the problem running 4.6ghz at 1.31 Vcore confirming this, so after turning the computer off. resetting the vcore back to 1.26, i am now stable again at 4.6 ghz after many stress tests.

what a relief :). Now getting the computer passed 4.6 is my next problem since the computer shuts down as soon as any load is applied,to 4.8-5.0ghz doesnt matter if its 1.35 vcore or 1.55 vcore.
 
Yeah, I had exact same issue redarding sleep, and it's what made me drop my 3930K and RAmpage Formula board.

I did a hell of a lot of troubleshooting to find the cause, but I could never get to the root of it.

You will see most of my experiences in the 3930K overclocking thread.

Think it was anything above 4.5GHz that did it for me.
 
Thanks ill look up on it.

Sleep is not a problem for me, since I don't use that feature. I had just reinstalled the comp so forgot to turn that feature off.
 
psychas said:
is it not the different way around i thought :confused: ibt more demanding then prime? or i was wrong
Click to expand...

Misconception, before Prime started to be AVX optimised, yes.. however since it uses AVX optimisations now its much more harder on the IMC/RAM and cpu then LINX/IBT etc.. I find systems passing 100+ ibt runs freezing or BSOD'ing in prime until i sort out whatever the issue is (usually VTT or Vcore).
 
Finally!



Uploaded with ImageShack.us

Benchmarking stable. No need for prolonged testing as I will only be benchmarking at this speed.

Its funny.. The guides I was following was the cause of all the problems.

In the end, I changed 3 settings and left everything on auto

X.M.P - 2133 Mhz Ram
Offset + 0.140
LLC = Medium
 
Last edited:
Running IBT on standard, you may as well not run IBT to be honest.
I can pass 4.8GHz on standard but not 1 on maximum, always use 5-10 runs on maximum. When people say IBT stable, that's what they mean. Standard proves almost nothing.

You'll also see a big temperature increase and IBT on maximum uses all the available RAM as well, so it covers 2 bases at once.
 
The goal as i posted was to get benchmark stable @ 5ghz. Theres no point ensuring the system is 100% stable on something ill use only for 3D Mark, Heaven, and other benchmarks that stress the computer far less than ibt standard. So far all those benchmarks have worked fine at 5.0ghz


My 4.6 24/7 overclock has been stressed for the last 2 days to ensure stability.
 
OC2000 said:
The goal as i posted was to get benchmark stable @ 5ghz. Theres no point ensuring the system is 100% stable on something ill use only for 3D Mark, Heaven, and other benchmarks that stress the computer far less than ibt standard. So far all those benchmarks have worked fine at 5.0ghz


My 4.6 24/7 overclock has been stressed for the last 2 days to ensure stability.
Click to expand...

Why not just use your PC as you would normally instead of wasting 2 days on synthetic nonsense.

Offset mode is not really for benching, neither is XMP you need to tune RAM to get better scores.
 
Thank you for your constructive input.

As you might have read, I have owned this setup for less than a week, if I have not tuned it to a standard such as yourself, I am all ears for your suggestions.

We both have similar setups, so I would be interested to see what your bios settings are for a 5.2 24/7 setup. Ive gone the 5.0ghz route 24/7 in the past, hence the reason I needed to upgrade since the chip was deteriorating rapidly at 1.45v.

I want this chip to last a few years so limiting myself to a 24/7 clock at max 1.3v and I guess I should have made myself clear from the start. 5.0ghz is my personal goal for benchmarking, purely to compare against my last i7 2700K setup, which is now nothing more than a stock HTPC due to the Sandy Bridges deteriorating so fast (Its about 8 months old).

Ram where I live (Singapore) is never great, so I have never focused on overclocking it.
I am currently using G.Skll Rip Jawz 2133 9-11-10-2 1.65, probably the best ram you can buy here in Singapore, without paying a 200% premium, but feel free to show me how you set your ram up.

Thanks
 
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