Gigabyte GA-EP45-EXTREME Living Review - Page 47

Pastie · #**461** 12-06-2009, 15:02

Cheers Mate

Mine seems to peak at 4.2 stable under air - don't want to put too much voltage through it without water , so it might go a bit higher yet

What voltage have you got your dominator at ?

graphic harbour · #**462** 12-06-2009, 15:24

4.2 stable under air , thats a good overclock well done
my qx9650 seems to want a lot of vcore
i also seem to get a lot of v drop from idle to load.
anyway my ram is running at 2.1v

Pastie · #**463** 12-06-2009, 21:31

I had to put 1.4625v through mine to get 4.2Ghz stable .
I'd noticed the amount of v.droop I get from the board as well ( anything up to nearly 0.3v

) - I thought it was my PSU , but must be the board ..........

CPUZ validator for 4207.85Ghz @1.440v ( 1.4625v in bios )

I tried the magic 500x8.5 ( 4250 Ghz ) , but it wasn't having any of it , and rebooted within less than a minute - I'll try again with the 8x multiplier when I get round to it

graphic harbour · #**464** 13-06-2009, 01:44

that seems like a really good chip
dont know about this v droop
maybe it is the psu partly
it would be nice to have another psu just to check it out

supershanks · #**465** 13-06-2009, 19:58

0.3v is normal & is actually engineered in by Intel.
Best explanation is probably this Intel Processor Power Delivery Guidelines Most bios have a way of circumventing it, called by various names Load line calibration(LLC) (gigabyte) vcore Droop (loadline) DFI, summat else Asus

. At the end of the day the key factor is what is your actual voltage is. IE on load per CPU-Z or via multimeter reading.

As you can see from the Anandtech diagram, vdroop is actually the difference between Idle to Load Vcore.

Pastie · #**466** 13-06-2009, 20:59

Thanks Shanks

Mafio · #**467** 13-06-2009, 21:01

2 days ago i made some test...

vcore bios 1.45

cpuz idle 1.408v
multimeter idle 1.428
cpuz full 1.376 (prime95 64bit)
multimeter full 1.404 (prime95 64bit)

than i think cpuz sucks...

i use dual core xeon e3110

supershanks · #**468** 14-06-2009, 12:02

Quote:

Originally Posted by mafio

2 days ago i made some test...

vcore bios 1.45

cpuz idle 1.408v
multimeter idle 1.428
cpuz full 1.376 (prime95 64bit)
multimeter full 1.404 (prime95 64bit)

than i think cpuz sucks...

Well it's not just CPU-Z but all software based monitoring. Their handicapped by the fact that the voltage is read via an 8bit register so voltage accuracy is severely limited. Other than use a multimeter as you did to highlight the issue, we're lumbered with it

Pastie · #**469** 15-06-2009, 15:18

Seem to have sorted the temperature prob out by sticking an 80mm fan to blow air between the 2 4870's and the motherboard temp has now dropped to 43c

supershanks · #**470** 15-06-2009, 21:04

sounds like a result