Core i7 Overclocking by Batch #

[raptord]

Is it the regular Platinum or is it the SLI version? The reason for asking is because I have the same batch and the SLI version of the Platinum. So far I haven't been able to OC that high yet. I have Corsair DDR3-1333 6GB memory.

regular plat with SLI version BIOS. I think these 2 are physically same. The main issue with MSI is you have to play memory setting a lot in order to get high Bclock.

[FabricioGS]

raptord,

Could you be more specific about this memory settings? I also have one MSI X58 Platinum (non SLI one, but I could flash it to the SLI version).

Past 3.9GHz I really can't keep the system table, specially at 20x200. I can run stable 19x200 wich generates the same uncore/qpi/memory values (3200/3600/1600), but for 20x200 I could only run 1h prime stable then crashed and I had to use like +0.230 vcore and +0.220 vQPI generating high temps.

I'm also stable at 205x19, but 210x19 for instance is completely instable too. The only things I set manually for the memories is 1T 8-8-8-24 or 1T 9-9-9-25.

[Infa]

Here's some comparisons.

http://ixbtlabs.com/articles3/cpu/ci7-turbo-ht-p1.html

Thanks for this, Interresting reading... maybe i will disable this then, Im nowhere near encoding and rendering, just plain benching gaming and usual usage...

[Infa]

Ok then now I have come to my 24/7 setting.. Think this is quite good though.

Vcore - 1.40(bios) 1.37.6(unloaded) 1.36(Loaded with LinX)
QPI/VTT - 1.38
vDimm - 1.70 (1.69)
Uncore @ 18x 3600
HT - OFF
Turbo - ON

Batch #3841A627

15 run of LinX ALL mem button, Realtemp shows minimum and Maximum temp, Avarage during linx was 62 highest, and 55 lowest core.

[bahlgren342]

CPU:
vCore: 1.3v (bios) 1.35v @ load
VTT: 1.2v (bios) 1.27v (cpuz and load)
Dimm: 1.65v (bios) 1.68 @ load
Uncore: 16x
HT: off

Memory: (forgot to screenshot it)
798mhz
FSB: DRAM 2:8
8-8-8-8-24 74

Batch# 3841A574

Here is a pick @ max load


9 hours prime95 stable.

Cooler: TRUE push

Anyone think I can get any further on my TRUE or have any sugesstions any of my other settings? New to Intel OCing.

[Renegade5399]

Ok then now I have come to my 24/7 setting.. Think this is quite good though.

Vcore - 1.40(bios) 1.37.6(unloaded) 1.36(Loaded with LinX)
QPI/VTT - 1.38
vDimm - 1.70 (1.69)
Uncore @ 18x 3600
HT - OFF
Turbo - ON

Batch #3841A627

15 run of LinX ALL mem button, Realtemp shows minimum and Maximum temp, Avarage during linx was 62 highest, and 55 lowest core.

If that's a 64bit OS, you need to check the 64 bit Mode box. That way LinX can use all your RAM. In you pic there, you're only using about 1.6GB even with the All button pressed because LinX is not in 64 bit mode.

EDIT: I see that box is greyed out for you. Are you running a 32bit OS? Why?

[sniperwulf]

Just picked up a 3841A595 920 from Microcenter. I'll update this once I get my other parts in.

[Infa]

If that's a 64bit OS, you need to check the 64 bit Mode box. That way LinX can use all your RAM. In you pic there, you're only using about 1.6GB even with the All button pressed because LinX is not in 64 bit mode.

EDIT: I see that box is greyed out for you. Are you running a 32bit OS? Why?

Yep 32bit OS, dont really know why, just do it =)

i got 3gb and 32 can use all, i see no need for 64bit?

I've tried it once , sure there were no problems really, just some programs that didnt work for it, but that was a while ago, those things have improved though, and Linx are using all mem i CAN use, there almost only one game i play, and thats Q3 and i dont know if that works in 64bit. maybe i should change? anyhow, i dont think that using 800mb more mem in linx will make my system unstable in the test?

cheers.

[FragMagnet]

Thanks for this, Interresting reading... maybe i will disable this then, Im nowhere near encoding and rendering, just plain benching gaming and usual usage...

Same here, the most I encode is the odd .avi to VOB files using nero 7, I haven't paid attention to the exact comparison between the 3.9HT and 4.1 w/o, but I know that the cores never go past 70% load either way, and it's something I only do 1-4 times a month ! So why lower my oc, or stuff another 12c into the processor 24/7 for a feature I never use ?

If software changes to use it, or I start using apps that benefit from it, I know enough to turn down the oc 200 mhz, actualy the profile for just that is saved in the bios. 3.9HT and 4.15 without. Even with improved cooling I don't think my speeds will be raised...just temps lowered.

To each his own though, I'm happy with it as is

[highoctane]

Ok then now I have come to my 24/7 setting.. Think this is quite good though.

Maybe its a difference between linx 5.6 and 5.8 and I'm not sure what it means exactly or if its comparable system to system but your GFlops is lower than mine and time per pass is higher as well with my 920 at 20x180 (3600).

I just thought it was odd when I saw your SS.

EDIT: That may explain your low temps with linx at that clock speed, something may not be taking.

[highoctane]

I am using water cooling (Swiftech Apogee GTZ, 6 litre water reservoir etc...). I did not do anything special, everything went ok when changing the thermal paste. It just won't boot anymore. It's a big riddle to me. Nothing like this happened before in my 25 years of pc experience.

Did you swap your memory to different slots, the reason I ask is I know my old msi x58 wouldn't boot unless I installed the memory in the correct slots, no beeps no nothing like the board was DOA.

[barry1983]

3841A380

[sparks.oc]

Did you swap your memory to different slots, the reason I ask is I know my old msi x58 wouldn't boot unless I installed the memory in the correct slots, no beeps no nothing like the board was DOA.

I didn't touch my memory before I had problems. Of course I did try different banks after the problems (with 1, 2 or 3 dimms). I just swaped my thermal paste, nothing more. Very strange.

[drnick]

Given that the memory controller is on the i7 chips, are we comparing apples and oranges when we talk about vcore requirements without using similar memory parameters (amount of ram, speed, and timings)? Or is it only the cpu vtt value and not the vcore that should differ with different memory configurations? I have come across a post or two suggesting vcore requirements can be decreased by downclocking ram.

Just wondering, as I have two supposedly "good" batch number 920's, one requiring 1.418vcore and the other 1.4625vcore to run stable at 4.0GHz with HT on and turbo off. I run both with 6 gigs of ram at 1600mhz with 8-8-8-21 timings. Just curious what ram configuration folks who run 4GHz stable at 1.3ish vcore are using.

(I realize chips can vary considerably even within the same batch number- just curious if memory might explain some of the differences in vcore requirements. Or maybe I'm just envious of the folks with better chips).

[Rammsteiner]

Batch: 3841A522, 200*21 (HT off)
Vcore: +120mV
VTT: +100mV

Ambient was low-ish, prolly 10~15C, at 15~20C it hits 60~65C or so

[highoctane]

Batch: 3841A522, 200*21 (HT off)
Vcore: +120mV
VTT: +100mV

Ambient was low-ish, prolly 10~15C, at 15~20C it hits 60~65C or so

Nice clock, since you're running prime95 I noticed that with ver 25.9 64bit version if you select custom you can allocate all the available memory now. I don't recall earlier versions being able to allocate all the ram so you may want to give it a shot, 25.8 might work as well but I never checked personally. If you enter too high a ram value you'll be bangin on the swap drive which will bring things to a crawl.

[methimpikehoses]

^^^
Is that prime stable?

Yes.

[Rammsteiner]

Nice clock, since you're running prime95 I noticed that with ver 25.9 64bit version if you select custom you can allocate all the available memory now. I don't recall earlier versions being able to allocate all the ram so you may want to give it a shot, 25.8 might work as well but I never checked personally. If you enter too high a ram value you'll be bangin on the swap drive which will bring things to a crawl.

Ive always been struggling with Prime95 to use all the RAM but it never did.

However, this was small FFT's anyway.

Ive ran 50 loops of Intelburn Test and about 8h of Prime95 Blend mode as well, guess that would be enough

[foolycooly]

Hey guys,

First post for me. First system build also, and first time attempting to overclock. System setup:

i7 920 @ 3.6ghz (see below)
ASUS P6T V2
OCZ platinum 1600 @ 1440 7-7-7-18 1T timings
cm v8 cpu cooler

As you can see, I'm doing this on stock voltages. The temps seem to be my biggest limiting factor. They were idleing in the 39-43 range and load temps you can see below.

However, I just back to school this evening from my spring break and the ambient temps seem to be making a huge difference. It's quite cooler in this room, and i've been booted for about an hour and am idleing in the 35-37 range. Much more comfortable





Any problems you guys see running 24/7 at this? Passed 2+ hours of prime95 capping at 76ish. Looking for some feedback being my first time!

[Pisklink]

Given that the memory controller is on the i7 chips, are we comparing apples and oranges when we talk about vcore requirements without using similar memory parameters (amount of ram, speed, and timings)? Or is it only the cpu vtt value and not the vcore that should differ with different memory configurations? I have come across a post or two suggesting vcore requirements can be decreased by downclocking ram....Just curious what ram configuration folks who run 4GHz stable at 1.3ish vcore are using.

I think you could have a good argument as long as we are not exactly certain which voltages influence which component. However if you look at my OC (see sig) I'm able to run RAM 100Mhz faster than the rated speed and still have my CPU at 4Ghz with vcore set at 1.35v in bios and 1.28v at load. Moreover at the moment I'm testing 1720Mhz RAM and 4.1Ghz with vcore 1.4v in bios and 1.33v at load.

In both cases QPI is set to 1.35v, CPU PLL at 1.88v and DRAM at 1.64v allmost all other settings at AUTO.

[Astratuner]

Is 1.42500V much for running a 920 at 4.2GHz with HT off and

I also require 1.42500V for running my 920 @ 4.0GHz with HT on?

I find it much if i compare it to the rest here...

What are youre thoughts on this?

[Infa]

Maybe its a difference between linx 5.6 and 5.8 and I'm not sure what it means exactly or if its comparable system to system but your GFlops is lower than mine and time per pass is higher as well with my 920 at 20x180 (3600).

I just thought it was odd when I saw your SS.

EDIT: That may explain your low temps with linx at that clock speed, something may not be taking.

See that you are using x64 and im not.. i have that instaleld now, and will do this test again 20 rounds all mem. strange thing though, that screen is Windows 7, and i tested this in vista to, wich gave me higher flops? same 32bit. Ah well, will get back to you, and 62c on a high end WC and 20c amb, only 1.36v? not so impossible.

cheers.

[col_dilian]

Can some one plz answear this question

when i run stock 920 133x20 CPU-Z reads 1.144 voltage
if i run 133x21 CPU-Z reads 1.225

now what exactly is considered stock voltage intel site shows 0.800-1.225

[Chicken Patty]

Can some one plz answear this question

when i run stock 920 133x20 CPU-Z reads 1.144 voltage
if i run 133x21 CPU-Z reads 1.225

now what exactly is considered stock voltage intel site shows 0.800-1.225

well a 21 multi is a higher clock overall so it probably has vcore set a little higher to make up for the extra speed. However if you set hte vcore manually, I have been able to do up to 3.3 GHz at 1.14v

[col_dilian]

Thanks for the reply

The reason iam asking is at 1.184 and qpi voltage of 1.21 sometihng again cant remeber i can do 175x21. I havent had the chance to test alot. But for 2 hours its stable prime 95 blend. Now at 1.225 i can go all the way to 186x21. But the qpi volts need ot go to like 1.3 maybe less havent tried. Any Idea how safe 1.3 QPI is for long term usage.