Core i7/X58 Overclocking Thread

[msgclb]

Here's my best so far but it got hot as hell, up to 95 degrees on core 0. That was running Prime95 that was stable for 2 hours. I tried to find a lower Vcore / QPI combination but all I've got is blue and black screens.

[Khalmyr]

wtf.. you're using a true, 3.8ghz and hitting 95ºC?

isn't that too much?

it's only 1.4v

[Scope666]

By taking the motherboard out of my computer and installing it.

I meant to fit the LGA1366 holes, they're wider than 775. I haven't seen a version of the V8 that fits 1366.

[GAR]

The base is probably not making good contact, my base is convext, but im lucky that atleast the middle makes good contact, the sides are left out, temps arent bad, so i wont lap it yet, since i am not at it. I have spoked to several people who sell the TRUE, all say the base problem is on most of them, especially the IFX 14.

[giorgos th.]

and some pi action with stock i7 cooler..

[Blacklash]

How much of a performance hit would I take used an old DDR 3 1600 2 x 2Gb kit vs triple channel?

[jaredpace]

anyone got a prime95 run yet?

[Splave]

whats max tempie for this babies?

[Slovnaft]

How much of a performance hit would I take used an old DDR 3 1600 2 x 2Gb kit vs triple channel?

scales well from dc to tc, you'll see about 2/3 the bw of a tri-chan config.

[T_Flight]

scales well from dc to tc, you'll see about 2/3 the bw of a tri-chan config.

That's exactly what I've seen on the graphs from the RAM companies like Corsair, and review sites. It's almost like a 1-2-3 linear increase. The bandwidth numbers are shocking with this platform. I about flipped out of my chair when I saw one of Fugger's runs. This platform has "knock your head off" bandwidth!

[Khalmyr]

The base is probably not making good contact, my base is convext, but im lucky that atleast the middle makes good contact, the sides are left out, temps arent bad, so i wont lap it yet, since i am not at it. I have spoked to several people who sell the TRUE, all say the base problem is on most of them, especially the IFX 14.

My TRUE only makes contact in the middle as well, but my temps aren't nearly as bad as those.

My question was more like... "Is the i7 hotter than my Kentsfield?"

cause we're both using the same volts (1.408) and the temps here are pretty high (28ºC)... I get 35 idle and 66 full... My temps only go over 70 when my room is above 30ºC

sorry for running out of topic, I'm just really curious as to how hot is the i7

[rge]

Water cooling mine with dtek fuzion (old model) and a very ugly 30 minute homemade 1366 bracket (awaiting real ones), temps max 68C under linpack, 66C prime smallffts. 4ghz looks like will be pretty easy to get stable, but just started testing few hours ago. Way too many numbers to play with, going to take a while to figure out what I am doing.

[fornowagain]

http://icrontic.com/downloads/nehale...ing-calculator

[Blacklash]

scales well from dc to tc, you'll see about 2/3 the bw of a tri-chan config.

Interesting. These sticks I have now are rated @ 7-7-7-18 1.9v. I really don't want dump that voltage on X58. Wonder if they would be stable @ something like 8-8-8-24, or 9-9-9-24 1.65v.

[GAR]

My TRUE only makes contact in the middle as well, but my temps aren't nearly as bad as those.

My question was more like... "Is the i7 hotter than my Kentsfield?"

cause we're both using the same volts (1.408) and the temps here are pretty high (28ºC)... I get 35 idle and 66 full... My temps only go over 70 when my room is above 30ºC

sorry for running out of topic, I'm just really curious as to how hot is the i7

i7 is for sure hotter than kentsfield and yorkfield, about 7-15c more id say.

[JumpingJack]

i7 is for sure hotter than kentsfield and yorkfield, about 7-15c more id say.

Using the same HSF and same ambient temperatures?

[unclewebb]

whats max tempie for this babies?

TJMax is 100C.
When overclocking you'll probably lose long term Prime stability near 90C.

I finally got RealTemp sorted out today so it should work correctly with Core i7 now. Version 2.86 is available here:

http://www.fileden.com/files/2008/3/...alTempBeta.zip

VID has changed in Core i7 so I need to do some more reading and testing to get that working correctly.

[jasonelmore]

I meant to fit the LGA1366 holes, they're wider than 775. I haven't seen a version of the V8 that fits 1366.

There are retention brackets for the 1366 at coolermaster.com for the V8. Contact Coolermaster support and buy some if thats the reason your not making good contact. until then put your tower on it's side and put something heavy on the V8 and downclock your CPU until your shipment for those brackets come in.

[jasonelmore]

whats max tempie for this babies?

Idk but i do know these things can handle a bit more heat than the core2 series. i've seen people at 90C and even 100C and it not fry there chips.. but i'm sure they were'nt running there system 24/7 like that.. Intel likely will not release the TJ Max values until these things are about to go off the market

[bowman]

As long as it's stable and not above 100C I wouldn't worry about it.. Well I'm not worrying about it.

[X.T.R.E.M.E_ICE]

If anyone needs to figure out the right base clock and multiplier combination to run the core, uncore, ram and QPI close to their maximum values, i made a little tool like the one i made years ago for the Athlon 64. (see sig)
Just enter the maximum MHz that you know your core, uncore, memory and QPI bus can do, pick the right cpu model, and hit the submit button.

I just kinda got it working and i don't have much time to work on it, but it seems to do a pretty decent job so far.

There might still be some multipliers missing as I'm still trying to find out exactly which ones are available.
Especially the QPI multi is still a little confusing because some boards have 18x, 22x, 24x while others call them 36x, 44x, 48x.
On the form the QPI speed should be entered in MHz not GT/s. For example the stock QPI speed of the 965 is 6.4 GT/s, which is 3200 MHz.

(Still debating on if i want to get an i7 now, or wait for 55nm Geforces to get a new setup)

I don't see to get what it does exactly. Am i missing the big picture?

[herderien]

Idk but i do know these things can handle a bit more heat than the core2 series. i've seen people at 90C and even 100C and it not fry there chips.. but i'm sure they were'nt running there system 24/7 like that.. Intel likely will not release the TJ Max values until these things are about to go off the market

i've found a test with stock cooler where the temps are going to more then 70° and intel specs for the thermal design show 67.9°c TcaseMax for 130W
that would allow i think around 70/75 safe for 24/7

[msgclb]

I made some changes and it's now running cooler.

BLCK: 190 (was same)
DRAM: DDR3-1523 (was same)
CPU Volt: 1.4V (was 1.4125V)
DRAM Volt: 1.64V (was 1.66V)
QPI/DRAM V: 1.375V (was 1.38125V)
CPU PLL: Auto (1.80V) (was Auto 1.88V)
Memory Timing: Auto (8-9-9-24-1T) (was set @ 9-9-9-24-1T)
HT: Disabled (was Enabled)



Here's 12 hours of Prime95. The max core temp has been 79 degrees.

[herderien]

interesting, is HT really usefull for non benchers ?

[jasonelmore]

i've found a test with stock cooler where the temps are going to more then 70° and intel specs for the thermal design show 67.9°c TcaseMax for 130W
that would allow i think around 70/75 safe for 24/7

yeah i know what the booklet that comes with the 920 says but it's nowhere near it's TJMax. intel just released the Core2 Duo TJ Max's 2 weeks ago ... i think these chips can handle a bit more heat than the core 2 duo series