2500k wants a lot of volts for 4.5Ghz

[IvanDobskey]

Got my voltage offset at +0.04 which gives me between 1.33 and 1.35v during max intel burn test at 4.5Ghz but it is not stable. However, it is stable at 4.3Ghz with the offset at -0.01 (about 1.28v). Temps creep up to high sixties during testing. Should I just settle for 4.3Ghz?

 

[koooowweeee]

each chip is different.

i would say dont go over 1.4 ish

but at 1.4v you should be able to clock anywhere from 4.5 to 5.0. all depending on how good your chip is

 

[IvanDobskey]

I think it's likely due to vdroop watching the voltage fluctuate as i'm testing. Maybe enabling / upping LLC will make a difference.

 

[Deception]

Don't think there is much in it between 4.3ghz and 4.5. Just enjoy the overclock and lower temps

 

[IvanDobskey]

Don't think there is much in it between 4.3ghz and 4.5. Just enjoy the overclock and lower temps

I know there's not much in it, just nice to get as much speed as possible

 

[koooowweeee]

what are your temps.

should be able to get 4.6 at least with that cooler

 

[sehcure]

Mine's IBT, prime for 6 hours, and OCCT stable at 4.5 with only 1.3-1.31 vcore.

It's all the luck of the draw sir.

 

[IvanDobskey]

Well, i've upped the offset to +0.05 which doesn't seem to have made too much difference to the vcore readings during testing (hovering around 1.336v). Hottest core is 70c. Stable so far....

Edit: It passes 10 runs of max IBT at +0.05 offset, highest core 70c at 4.5Ghz.

 

[FiXiT]

Like most have said, every cpu and pc setups are different. My son & I bought our cpu's at the same time and from the same place, his clocked @ 4.5 GHz out of the box without altering any board setting, but mine wont clock passed 4.3 GHz no matter what board setting I seem to apply. He is using an upper model motherboard too me so perhaps this is the reason he his getting a better overclock, maybe one day I'll drop my cpu in his board and find out. I've tried upping the voltage offset to 0.100v but had no success in getting it to boot in to windows.
@ 4.3 I've got the vcore offset at -0.050, under stress the vcore goes up to 1.25v with temps between 55-65c, when not under load the vcore drops to about 0.92v and temps of 23-30c.

 

[IvanDobskey]

I've settled on 4.5Ghz, don't think i'll get it any higher without whacking the volts close to 1.4v.

 

[Justintime]

Many 2500k i've had topped out at 4.5Ghz within reasonable volts. I don't believe the hype about low (1.3 and under) volts being the norm at all as some say. Also a lot of 'stock' overclockers don't realise the boards overvolt, sometimes massively when left on auto.

 

[MOOGLEYS]

Mine needs 1.35v for 4.5ghz and 1.4v for 4.8ghz with max temps of 70.c under heavy load. If you can control the heat you can up the voltage just keep an eye on the temps and aim for under 75.c as a max...

 

[Mookzen]

Mine does 4.5 at no less than 1.33 under load. I too am of the opinion that we have come to underestimate the average volts needed to overclock these in general. There are quite a few people around who claim 4.5 stable at 1.28 while failing to mention their high LLC or somesuch. Considering the various settings and factors involved, the only volts that matter are those at peak load.

 

[craig0ss]

mines at 4.7 @ 1.34-5

Stable for 10 runs of IBT on max, then not stable for another 10 runs, the stable again... I am trying to find the lowest volts for the clock but other than IBT sometimes throwing an error its not crashed in anyway doing anything else, playing bf3 for hours which runs the CPU at around 40-45 c

Sorry to hijack the thread but does anyone else have a large temp differance on one of their cores? My core 0 runs 8-10c less than the others on load and about 4-8c on idle, this was the same on air as it is on water?

 

[Wazz-1]

Sorry to hijack the thread but does anyone else have a large temp differance on one of their cores? My core 0 runs 8-10c less than the others on load and about 4-8c on idle, this was the same on air as it is on water?

yes I have upto 10c difference , i think it's fairly normal even after reseating my cooler and applying new TIM, nothing to worry about.

 

[Mookzen]

yes I have upto 10c difference , i think it's fairly normal even after reseating my cooler and applying new TIM, nothing to worry about.

2 of my cores show consistently higher temps with the difference between the hottest and the coolest at around 8c, though I have yet to reseat mine.

 

[Wazz-1]

Mine does 4.5 at no less than 1.33 under load. I too am of the opinion that we have come to underestimate the average volts needed to overclock these in general. There are quite a few people around who claim 4.5 stable at 1.28 while failing to mention their high LLC or somesuch. Considering the various settings and factors involved, the only volts that matter are those at peak load.

Mine does 4.5GHz @1.3 volts fixed in bios set with low vdroop i've not changed any other settings, under IBT cpu-z shows 1.272.

I also think motherboards have a lot to do with overclocking i.e. quality of power delivered to the chip.

 

[MOOGLEYS]

It's common for the cores to indicate quite large temp differences and is more to do with the way the tempertatures are reported rather than the actual core temps.

In short it's fine....