Core i7/X58 Overclocking Thread

[CryptiK]

Ah ok no problem, I thought it was only Large FFT That's an excellent CPU you have there.

[emertX]

Thanks!

[momoto]

Very nice indeed, about the best vcore I've seen for 4 GHz, what's load vcore? Cooling? Funny bug with CAS 4, I'm surprised it ran at all heh.

Here's what I've managed so far on air on Windows 7 64, could perhaps drop vcore another notch or two if I was on water.

4 GHz @ 1.104V~1.120V / 1.3250Vtt / ddr3-1527 / 7-7-7-21-60-1T




CPU：Core i7 920　BOX　3845B027
Motherboard： ASUS P6T　（BIOS 0801）
mem： APOGEE　APG3-1600-2GX3GT (DDR3-1600 2GB×3）
VGA： GeForce 9400GT　
SSD : Patriot　PE64GS25SSDR 64GB
HDD : ST3160021A
PowerSupply： Zippy 600W
CPU Cooler : MUGEN∞2(SCMG-2000) 12cmFAN*2
OS : Windows 7 64bit
Room temperature 10℃

Ai Overclock Tuner ................. [Manual]
CPU Ratio Setting .................. [Auto]
BCLK Frequency ...................... [191]
PCIE Frequency ..................... [103]
DRAM Frequency ..................... [1531Mhz]
UCLK Frequency ..................... [3638MHz]
QPI Link Data Rate ................. [6893MT/s]
Dram Timming Control -> 7-7-7-21-4-60-1T
CPU Voltage ........................ [1.11875v]
CPU PLL Voltage .................... [1.80v]
QPI/Dram Core Voltage .............. [1.3250v]
IOH Voltage ........................ [1.20v]
IOH PCIE Voltage ................... [1.50v]
ICH Voltage ........................ [1.10v]
ICH PCIE Voltage ................... [1.50v]
Dram Bus Voltage ................... [1.66v]

Load Line Calibration.................[Enable]
Cpu Differential Amplitude..........[Auto]
CPU Spread Spectrum ................ [Enable]
PCIE Spread Spectrum ............... [Enable]
CPU Clock Skew ..................... [Auto]
IOH Clock Skew ...................... [Auto]

GFlops 48
　

[CryptiK]

Nice, 3845B027 is about the best batch produced so far. Seems our CPUs are virtually identical in vcore requirement for 4GHz, yours requiring only 0.008v more.
Due to your low ambient temp, your chip is running around 15 - 17*C cooler than mine under load.

[Salamndar]

Nice, 3845B027 is about the best batch produced so far. Seems our CPUs are virtually identical in vcore requirement for 4GHz, yours requiring only 0.008v more.
Due to your low ambient temp, your chip is running around 15 - 17*C cooler than mine under load.

I have 3923A and I say it is not your nice and friendly batch.

I'm able to reach 4439 MHz with 1.45v on CPU !!!!

I was able to cplete 8 hours of prime95 and 20 runs on LinX but couldn't like the taste of running my CPU 24/7 with that voltage.

I backed off a little and now testing the CPU @ 4305 MHz with 1.35v.

I'll post pics later tonight !

[CryptiK]

That's not too bad really. There's certainly a lot worse out there.

[zalbard]

Room temperature 10℃

Get a new place to live in, buddy.

[Salamndar]

OK here is mine, not so sharp.

Batch # 3923A

[momoto]

4.3GHz It tries lightly. 3845B027 doesn't want electricity so much. It is a very good chip. However, it is a hot chip for a moment

[CryptiK]

Nice work guys. Yeah, mine is very hot also, low VID chips need water cooling to really shine.

[emertX]

Nearly as good as mine!

[Presretach]

Here are my results, I hope I am not wrong topic.

[AriciU]

FPO: 3939A975
GA-EX58-UD5 F9E
Mushkin XP3-15000
Prolimatech Mega Shadow + 2 PF12's

This is my first attempt after building the thing. Not messed with memory timings yet. CPU seems a bit hot. I can boot and enter Win7 at 4515 (21x215) but unstable obviously...

QPI/VTT is at 1.315v. Don't really know what to use for this as i'm new to i7's.

Any suggestions for improvements other then up vcore and pump 4300mhz in ?

[emertX]

Here's my new record!

[dan7777]

Here's my new record!

really nice chip there can you run it 24/7 at that speed if so incredible.

[Sam_oslo]

Here's my new record!

This is really good

I guess this is the max 24/7 OC one may hope for on current motherboards.

[emertX]

24/7 is 4200 @ 1,184V with 2000 mem 8-9-8-24

4600 is to hot for 24/7...

[radaja]

emertX,thats incredible,but with a chip like this
you really should consider moving somewhere
like iceland or alaska so you can keep that OC
24/7.it not fair to the chipJust kidding
but seriously thats a great OC,good job

[zalbard]

emertX,thats incredible,but with a chip like this
you really should consider moving somewhere
like iceland or alaska so you can keep that OC
24/7.it not fair to the chipJust kidding
but seriously thats a great OC,good job

Haha, agreed.
Really god job there!

[Sam_oslo]

24/7 is 4200 @ 1,184V with 2000 mem 8-9-8-24

4600 is to hot for 24/7...

@4.2GHZ is a great 24/7 OC, but Your max core-temp for @4.62GHZ is 67'C under Prime-load.
This is not too hot, but also is great for 24/7 use, unless you are using some kind of "exotic"-cooling on this run. What kind of cooling are you using?

[Chicken Patty]

@ emertX

very good job bro, that is a might fine CPU you got there my friend

[rge]

This is really good

I guess this is the max 24/7 OC one may hope for on current motherboards.

Yep, 4.6x is max I have seen prime or linx for any length of time. And most use abnormally low ambients to get 4.6, including myself.

At 4.4ghz, my i950 is very stable whether 72 load or 90C load (turned fans off on rad to get 90s).

At 4.5, got 11+ hrs prime and linx max mem, but with indigo tim and 23C ambients and 2rads to keep load temps in mid 70's. If load gets in high 80s = bsod.

At 4.6, I can get prime only few hours, and linx 20 run max mem, but with 15C ambients (outside temps). Inside temps = bsod.

[Sam_oslo]

Yeah, specially with 920 or w3520, a couple of BCLK up, and many motherboards won't even boot at 222+ with x21 multi.
It takes a really good CPU-batch (+ good MB, RAM and cooling too) to get it Prime-stable at @4.6GHZ+.
It is the ultimate 24/7 OC on the current platform, I guess.

[vaio]

Only up to page 26..........by time I've read this thread you'll all be posting in the Gulftown thread

[Chicken Patty]

^^^