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]

Originally Posted by CryptiK

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]

Originally Posted by 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.

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]

Originally Posted by momoto

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 ?