5820K running at max Vcore 24/7?

Goose · 3 Jul 2016 at 18:42

Had my 5820K a few days now and i'm unsure if my overclock is running as it should because i set the vcore to 1.2v for 4.2ghz which is where it stays. Under 0% load it underclocks as expected to 1.2ghz but there is no drop in the vcore which is not what I was expecting.

Is this normal behaviour for X99 or have I done something wrong?

Thanks

tribz · 3 Jul 2016 at 19:32

If you set the vcore then yes it will stay at that setting.

Depending on your board, you may be able to use an offset setting instead where it adds voltage when the CPU frequency increases and the removes it again when the frequency drops. Some boards dont support this, my MSI one being one of them.

Petelock · 3 Jul 2016 at 19:50

Conversely, my MSI board does. I set adaptive voltage which will reduce the voltage to circa 0.87 v when running @ 1.2 idle and then up to 1.27 when it clocks up to 4.5 OC. If you have the voltage set constant though, it will stay at the core for the OC.

Goose · 3 Jul 2016 at 22:01

Thanks guys.

As a general rule then is Offset recommended rather than fixed? I cant imagine running 24/7 with an increased vcore will do the longevity of a CPU any good.

Minstadave · 3 Jul 2016 at 22:12

Yeah offset is preferred

Combat Fighter · 4 Jul 2016 at 08:07

Minstadave said:
Yeah offset is preferred

Even more so with 8 cores.

Dirk Diggler · 4 Jul 2016 at 19:33

I prefer fixed voltage for stability. If the clock drops and temperatures are low then it isn't doing any harm, surely?

8 Pack · 4 Jul 2016 at 21:59

I certainly don't care about the CPU clocking up or down or the dynamic voltage changes. For me it's making no difference to CPU life in my experience of several hundred CPU per generation.

Just overclock and enjoy!!

abui1806 · 4 Jul 2016 at 22:18

8 Pack said:
I certainly don't care about the CPU clocking up or down or the dynamic voltage changes. For me it's making no difference to CPU life in my experience of several hundred CPU per generation.

Just overclock and enjoy!!

how about power consumption may I ask? i assume the saving would be minimal given one runs 8 hours/day, 5-6 days/week.

Petelock · 4 Jul 2016 at 22:30

Indeed it was more from a power consumption point of view that I have mine on dynamic.

Dirk Diggler · 5 Jul 2016 at 06:44

TDP of 5820k is 140w.

Power saving would barely be £5 per month for a 8 hours per day machine.

tribz · 5 Jul 2016 at 07:23

I'm not particularly tight but I take the view that thats a free maccy d for me each month for doing nothing other than changing my voltage settings

Petelock · 5 Jul 2016 at 10:24

tribz said:
I'm not particularly tight but I take the view that thats a free maccy d for me each month for doing nothing other than changing my voltage settings

Agree that it's down to the total saving that a household makes across all power sources (lightbulbs, white goods etc). The CPU may only be £5 a month, but combined with a household's worth of efficiency means that the saving becomes holistically a worthwhile exercise.

Dirk Diggler · 5 Jul 2016 at 15:07

Petelock said:
Agree that it's down to the total saving that a household makes across all power sources (lightbulbs, white goods etc). The CPU may only be £5 a month, but combined with a household's worth of efficiency means that the saving becomes holistically a worthwhile exercise.

A sensible statement, however if I'm paying £1200 for 2 GPU's and then the rest for the waterworks, CPU, MoBo etc then £5 really is a drop in the ocean.

Actually, the additional 10% performance from my GPU overclock probably consumes more. :eek:

Petelock · 5 Jul 2016 at 15:49

String said:
A sensible statement, however if I'm paying £1200 for 2 GPU's and then the rest for the waterworks, CPU, MoBo etc then £5 really is a drop in the ocean.

Actually, the additional 10% performance from my GPU overclock probably consumes more.

Ha that is true - however the wife doesn't need to know what I paid for what's sitting in my PC

evilsooty999 · 6 Jul 2016 at 16:24

8 Pack said:
I certainly don't care about the CPU clocking up or down or the dynamic voltage changes. For me it's making no difference to CPU life in my experience of several hundred CPU per generation.

Just overclock and enjoy!!

I have a 5820K @ 4.5GHz that I can only get stable with 1.32vcore. Do you think that's a safe level to keep it at? Adaptive is on, but doesn't go above 1.32 even during IBT runs at maximum.

Cheers

stooeh · 6 Jul 2016 at 16:42

My 5820K @ 4.5GHz also takes 1.32V. I also have mine on fixed voltage - mine is watercooled though so temps are pretty good.

evilsooty999 · 6 Jul 2016 at 16:48

stooeh said:
My 5820K @ 4.5GHz also takes 1.32V. I also have mine on fixed voltage - mine is watercooled though so temps are pretty good.

How long have you had it like that? I've got a NH-D14 so the temps are kept under 70 gaming. When I Googled all this opinion seemed split between those who would never go over 1.3 and others who said you could go up to 1.4 easily provided your temps were kept under control.

stooeh · 6 Jul 2016 at 18:09

I bought the chip back in June last year but I did run it @ 4.3 with 1.251V for a few months at first. At least 6 months @ 4.5 I would say.