4.6Ghz on Haswell, Looking at 4.8. Help!

lettuce · 11 Jun 2013 at 18:50

Ok thanks ill give them ago.

I have 'CPU VRIN Loadline Calibration' setting at AUTO seems to get a stable System. Am just try for 4.7 and failed after 2 minutes on OCCT at 1.248v, but then changed from Medium to Auto and its now currently as 14 minutes, and CPU-Z isnt report any more volts being used

stulid · 11 Jun 2013 at 19:10

Keep going, you're doing well.

lettuce · 11 Jun 2013 at 21:27

Needed 1.272v to get 4,7 stable in OCCT for 30min test.....

Seems crazy that i need 1.200v to get 4.6 stable but need a fair bit more to get another 100hmz

wazza300 · 11 Jun 2013 at 22:02

that's the way the silicon cookie crumbles

apeksdiver · 11 Jun 2013 at 22:11

I'd be happy with 4.6.

lettuce · 11 Jun 2013 at 22:35

Yeah i guess, id hate to think what its going to take for 4.8Ghz, probably be looking at 1.36v probably

Zeed · 12 Jun 2013 at 08:13

lettuce Always funny asking about temperatures on those chips When every single one has different temps at each clock depending on tim application. Same goes for cooling..
Every single review i seen got different temps at 4.5 gotta love chip lottery on Haswell :/

lettuce · 12 Jun 2013 at 11:17

Well 4.7Ghz is now stable @ 1.260v (using CPU Offset).....

The way im looking at it is 1.260v will be fine for a 24/7 OC as im using CPU Offset so i doubt that there is going to EVER be a app that i use that is going to load the CPU to 100% and cause the CPU to draw the full 1.260 volts it does when stress testing, am i right in thinking that?.
OCCT seems to literally thrash the CPU to an inch of its life, whilst ADIA64 doesnt seem to be so stressful on the CPU, this is shown in the different max temps that the 2 programs give after a stress session??

4.8Ghz on the other hand, got up to 1.36v and OCCT blue screened in the first 20 seconds. It seemed that the closer i got to 1.36v the quicker OCCT failed, at 1.30v OCCT lasted longer!. Is there any reason for this?

Shiari · 12 Jun 2013 at 11:29

Nice CPU you have there, lettuce ... I need a little over 1.3V to get stable at 4.6

As to OCCT crashing sooner on higher voltage, that could just be luck ... or is it repeatable?

If you're also overclocking your memory at the same time as the CPU, you might want to do that separately as Haswell is not like previous generations. Overclocking your memory can affect the overclock on the CPU, and vice versa.

lettuce · 12 Jun 2013 at 13:46

Shiari said:
Nice CPU you have there, lettuce ... I need a little over 1.3V to get stable at 4.6 As to OCCT crashing sooner on higher voltage, that could just be luck ... or is it repeatable?

If you're also overclocking your memory at the same time as the CPU, you might want to do that separately as Haswell is not like previous generations. Overclocking your memory can affect the overclock on the CPU, and vice versa.

Seems to do i quiet often, like 1.295 to 1.32 seems to last longer in OCCT than a voltage of 1.35-1.36v!