Core i7/X58 Overclocking Thread

[Lukee]

I had been reading how much better the B batch ship were so I bought a new 940 3837B125 chip. Now you guys are saying that A is better?

Which is it?

I have an A chip and it sucks. Can't do more than 200 bclk without really high qpi/vtt.

I decided to get the 940 to see what the difference was compared t0 the 920. Is it binned higher? Can you achieve the same frequencies with less heat, etc..

Do you think $490 for a 940 is a good deal?

[Xello]

There are going to be great and bad chips of all batch ranges, any patterns that seem to emerge with certain ones if you ask me are entirely coincidental

[eva2000]

3836a977

nice when ya have time update us on longer prime95 durations i.e. at least 1hr heh

I had been reading how much better the B batch ship were so I bought a new 940 3837B125 chip. Now you guys are saying that A is better?

Which is it?

I have an A chip and it sucks. Can't do more than 200 bclk without really high qpi/vtt.

I decided to get the 940 to see what the difference was compared t0 the 920. Is it binned higher? Can you achieve the same frequencies with less heat, etc..

depends on week more than A or B in the batch i think

[dejanh]

Well on my box it says something about 1,3xV max as with the C2D's

Yeah, he's right. Intel lists 1.55V on the CPU as the absolute max.

[Lukee]

nice when ya have time update us on longer prime95 durations i.e. at least 1hr heh
depends on week more than A or B in the batch i think

Ok, so any info on Batch 3837B125?

One other thing, I'm running OCZ gold 8-8-8-24 1.65 ram. I have 12 GB, do you think they'll OC to 1800MHz or because I am runnnig 6 sticks the most I can run them at will be 1600ish?

[Splave]

Im suprised they run at 1600, most manufacturers dont even guarantee that two sets will work at spec

[jcool]

Yeah, he's right. Intel lists 1.55V on the CPU as the absolute max.

I guess you're right.. nice, so I don't have to worry going past 1,5V
On a 45nm C2D it was considered like a big risk for 24/7

[derektm]

Great news on 3836B043! This chip is DEFINITELY a buy! It's only been in for about a minute so I haven't tested it much yet.

My other 920's and 940 took 1.4v+ to even boot Vista at 4GHz. I took out my previous 920, which took 1.3V for 3.8GHz stable, dropped in the 3836B043, left it at 1.3V and raised the BCLK to 211. Booted right into Vista!



Will test further later.

Edit: Can't get it Prime blend stable no matter what I do. Tried PLL up to 2.1V and uncore at 1.4V. Vcore up to 1.425. It seems to fail when it hits 86C or so. I don't think it likes the heat.

[Avan]

Will test further later.

Please do, I'm definately looking forward to hearing much more about this batch. Thanks!

[Brahmzy]

Sorry if this is a dumb question.... or covered before. I just got my new i7 rig setup and am testing to find max OC. My goal is 4.0GHz 24/7 with HT on...

So, with a 920, how are you guys able to use a 21x multi? My ASUS P6t WS Pro stops at 20x... I'm currently in the middle of Priming at 211 x 9x .. but wanted to try a 21x multi, if possible.

Oh, and HOLY CRAP these i7's runs HOT! Mine's getting up in the mid-high 80's!

3841A432 BTW

EDIT: Doh, just BSOD'd at 27 minutes Priming.

What I'm trying so far: ANY SUGGESTIONS?

CPU - 19
BCLK - 211
DRAM Freq - 1269 (taking it out of the mix)
UCLK - AUTO
QPI Freq - AUTO
DRAM Timing - AUTO
CPU V - 1.375 BIOS
CPU PLL V - AUTO
QPI/DRAM V - AUTO
IOH - 1.12
IOH PCIE V - 1.52
ICH V - 1.20
ICH PCIE V - 1.60
DRAM BUS V - 1.64
All other DRAM V - AUTO
LLC - EN
CPU DIFF - AUTO
CPU Clock SKEW - Delay 110ps
CPU SS - DIS
IOH Clock SKEW - Delay 110ps
PCIE SS - DIS

[SteveRo]

OC on mission-critical machines? Yes please!
You sure you're in the right forums?





Sorry mate, had a real good laugh when I saw this... 1,52V vcore being within Intel spec? Not even close
Nice OC anyway

jcool - intel max spec unless I got something wrong -

[Avan]

Sorry if this is a dumb question.... or covered before. I just got my new i7 rig setup and am testingto find max OC. My goal is 4.0GHz 24/7 with HT on...

So, with a 920, how are you guys able to use a 21x multi? My ASUS P6t WS Pro stops at 20x... I'm currently Priming at 211 x 9x .. but wanted to try a 21x multi, if possible.

Turbo mode when using all your cores bumps your multi by 1x. So if you set it at 20x turn turbo on, it will be 21x. Also if you run single core at 20x with turbo on, it will clock to 22x.

[SteveRo]

Intel's max is 1.55v....plus his temps are beautiful.

Thanks reverend, I am trying to reduce voltages now - looks like I will not be lowering very much based on results so far. I need 1.5375 vcore to pass linpackx5. I am please about the temps - my first water build - probably got lucky!

[SteveRo]

Sorry if this is a dumb question.... or covered before. I just got my new i7 rig setup and am testing to find max OC. My goal is 4.0GHz 24/7 with HT on...

So, with a 920, how are you guys able to use a 21x multi? My ASUS P6t WS Pro stops at 20x... I'm currently in the middle of Priming at 211 x 9x .. but wanted to try a 21x multi, if possible.

Oh, and HOLY CRAP these i7's runs HOT! Mine's getting up in the mid-high 80's!

3841A432 BTW

Yes, the 21 multi seems to be the sweet spot for a lot of procs, including mine. Yes, they do run hot - are you on stock air?

[Splave]

steve any pro tips for getting such great temps? Im on a gtz as well with a single 3x120rad with 3 slipstream 116cfm fans and my load is higher at 1.375 set in bios. What is your ambient like? thanks and nice oc

[derektm]

Please do, I'm definately looking forward to hearing much more about this batch. Thanks!

Working on it! I can boot vista with 1.25v, getting it prime stable is another thing. When temps hit mid 80's I get BSOD even at 1.35v. Using Noctua air cooler.

[SteveRo]

steve any pro tips for getting such great temps? Im on a gtz as well with a single 3x120rad with 3 slipstream 116cfm fans and my load is higher at 1.375 set in bios. What is your ambient like? thanks and nice oc

Bob - I went over and posted that I was a water nub in the cooling forum (which I am - this was my 1st water build) - I got excellent help - here is the thread, also below was what I bought and built.
I don't have one the golden procs - but what I have now is a cooling system that allows me to apply the big volts and get away with it - I couldn't do that on air with the nehalem I was dealt - too much heat!

http://www.xtremesystems.org/forums/...d.php?t=212948

[ReverendMaynard]

man that Feser Xchanger is sick. I'm on a garbo 2x120 Swiftech MCR220 with a couple of 60+CFM scythe fans so I'll be looking into that feser very soon

[Brahmzy]

Turbo mode when using all your cores bumps your multi by 1x. So if you set it at 20x turn turbo on, it will be 21x. Also if you run single core at 20x with turbo on, it will clock to 22x.

So, on this ASUS board, I don't see a "Turbo" mode anywhere. I see HT and some other stuff, but no Turbo anything. I'd like to find it, so I can get the 21x and lower my BCLK.

Yes, the 21 multi seems to be the sweet spot for a lot of procs, including mine. Yes, they do run hot - are you on stock air?

I've got a brand new perfectly lapped TRUE Black with a 38mm fan on it on medium.

[SteveRo]

The feser was pricey but looks like it was worth it.

[SteveRo]

So, on this ASUS board, I don't see a "Turbo" mode anywhere. I see HT and some other stuff, but no Turbo anything. I'd like to find it, so I can get the 21x and lower my BCLK.



I've got a brand new perfectly lapped TRUE Black with a 38mm fan on it on medium.

The true cooler is one of the very best - if you are lucky to have one of the procs that responds well to low vcore the true will be all you need.

[SteveRo]

steve any pro tips for getting such great temps? Im on a gtz as well with a single 3x120rad with 3 slipstream 116cfm fans and my load is higher at 1.375 set in bios. What is your ambient like? thanks and nice oc

Bob - the other thing - I am operating an open case - tech station in a cold basement - house furnace is barely keeping up - about 18F outside at the moment!
I probably need a new furnace - lets see new furnace or new computer stuff - new furnace or new computer stuff - ok - new computer stuff!

[ReverendMaynard]

Bob - the other thing - I am operating an open case - tech station in a cold basement - house furnace is barely keeping up - about 18F outside at the moment!
I probably need a new furnace - lets see new furnace or new computer stuff - new furnace or new computer stuff - ok - new computer stuff!

sheeeeit, it was - 17F yesterday morning, and when I tried to start up my vehicle, the gas line was frozen lol. If I crack my window open for a bench session, I'd be found dead the next morning

[Avan]

So, on this ASUS board, I don't see a "Turbo" mode anywhere. I see HT and some other stuff, but no Turbo anything. I'd like to find it, so I can get the 21x and lower my BCLK.

I don't have an ASUS board, but I remember someone saying(and I don't remember which board they were referring to) that you needed to turn Speedstep on first before you can toggle Turbo mode. But, we probably need someone with an ASUS board to better answer that for you.

[Splave]

Bob - the other thing - I am operating an open case - tech station in a cold basement - house furnace is barely keeping up - about 18F outside at the moment!
I probably need a new furnace - lets see new furnace or new computer stuff - new furnace or new computer stuff - ok - new computer stuff!

thanks for the headsup and links bro