i7 & UD5 will not OC.

Robert

Robert

Robert

Soldato
Joined
20 Oct 2002
Posts
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Basically I got it to run at 3.2 (not primed) and it seemed fine...however I just couldn't hit 3.8 (would go into a reboot cycle).

Eventually I got 3.8 with the following settings:

1.35v CPU
1.255 QPI
1.64 RAM
X36 QPI
x13 uncore
6 RAM divider
190bclk

It seemed fine - again not primed. I went to work yesterday and came home, turned it on and I got the reboot cycle again. Now it won't post with 3.8 as it just goes into a reboot cycle.

:(
 
I don't claim to be an expert, but with the help of some people on these forums have just overclocked a i7 920 on a EX58-UD5 with 12GB of Corsair XMS3 ram.
I'll post the settings in here for reference but others may be able to give you more useful information.
I know what yo mena though by the reboot cycle, I was getting past 3.0 but am now happily at 3.8

CPU Clok ratio 19x
QPI Link speed x36 (7.2GHz)
Baseclock 200
Performance Enhance - standard
XMP disabled
System memory multiplyer SPD - 6.0
Memory frequency - 1200MHz
intel turbo boost - disabled
Cpu cores enabled - all
CPU multithreading - enabled
C1e , C3/c6/c7, thermal, EIST and PROCHOT all disabled
Virtualization - enabled.
Uncore freqency x13 (2600MHz)
Isochronous supprot - enabled
PCI frequency - 100
CIAZ -disabled
CPU clockdrive 800Mv
PIC Express clock drive 900Mc
CPU cliock skew 100ps
IOH clock skew 0ps
DRAM timin schedule selectable - manual
then on all 3 channels set as follows
CAS Latency time 6
tRCD 6
tRP 6
tRAS 19
Command rate 1

Local-line calibration - disabled
CPU Vcore 1.325V
QPI/VTT coltage 1.295v
IOH Core 1.16V
DRAM Voltage 1.640v

everthing else is as at default / auto
 
Well after running fine at 3.8 for quite a while last night...came home and powered it up. It then cycled and went off. Now running back at 2.66

Piece of ****.
 
Mine does the same thing sometimes as of last, i'm currently experimenting with settings to try and get it to boot reliably.
 
bush_doing_it_wrong.jpg


Have you tried reading this guide : http://www.overclock.net/intel-cpus/538439-guide-overclocking-core-i7-920-4-a.html

I overclocked mine by reading this guide alone having gone from an old AMD pc to an i7.
 
had no email from you matey,

its

nvom.rich [at] hotmail.co.uk

the cold boot issue is a real pain on the UD5
its something that only happens in certain scenarios
you dont happen to have a be quiet/seasonic power supply do you?
 
not helpful for you but others here have had cold boot issues with giga boards. Not sure if anyone found a reliable working solution but worth a search / few emails maybe to find out?
 
To be honest I can't see where it's going wrong. The settings in your OP should be working, all I can suggest is working up from 3ghz (primed/ibt stable) much more slowly. I'm using x12 uncore with x6 memory, but most places online think either double or double+1 is fine.

I've put a rather long post on the topic here which may be of help. Unfortunately it doesn't really cover the process up to 4ghz on my system.

My best guess for your case is the qpi/ram ratio has to be different, probably decrease vdimm though more qpi may help instead.

Sorry man

edit: oh, this is the infamous cold boot issue then. I did wonder what that meant.
 
just sent you a bunch of profiles to try out,

see how you get on

the PATRIOT4 is the most likley to work first time

obviously you would need to tighten your memory up after getting the cpu stable as the memory timings are left deilberatly loose on those profiles

just set it to the timings on the outside of your modules and it should be all good
 
Id try QPI/vtt at at least over 1.3v, enable Load Line Calibration, Memory multi set to x8, Uncore multi set to x16 and leave the turbo on the cpu multi for x21 and alter your bclk accordingly. Also you shouldn't need your vcore at 1.35v for 3.8Ghz with a D0 stepping, 1.3v should do it. Thats my two pence anyways :)
 
Last edited:
Nocky24 said:
Id try QPI/vtt at at least over 1.3v, enable Load Line Calibration, Memory multi set to x8, Uncore multi set to x16 and leave the turbo on the cpu multi for x21 and alter your bclk accordingly. Also you shouldn't need your vcore at 1.35v for 3.8Ghz with a D0 stepping, 1.3v should do it. Thats my two pence anyways :)
Click to expand...

Sorry mate, see above I've tried these things already :(
 
Regarding the cold boot issue with these mobos, I used to get them quite a lot when I first build this rig, but ever since I moved over the F9e BIOS, I no longer experience this problem.

However, as Rich already pointed out, certain PSU's can be the cause of the cold boot issue, Seasonic, and Thermaltake units are the ones that I know off that people have had issues with.

Regarding your O/C, have you tried loosening up your RAM timings to say 8-8-8-24-2t, and maybe try having PCIe frequency set to 101MHz, also, set CPU Clock Skew back to 0ps for just now, you shouldn't really need to touch this atm, this only really helps when pushing for more than 200 Bclk.
 
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