I have EVGA Classfied E760 and cpu i7 920 D0. So far, I door turned to 4.5Ghz with the following voltage:
Turbo ON
Multiplier 21x
BCLK 215
cpu voltage 1:45
Dram voltage 1.60
time 8-8-8-24 2:8
Cpu cooled by water. Sat Memory Corsair Dominator 3x1GB 1600Mhz. I wonder what I can change that door turned over 4.5Ghz?

I messed up and posted this in the wrong thread earlier.....got my "guides" confused, lol.

Anyway, here's where I'm at:

Okay, followed the guide, and managed to get all the way up to 225 bclk, then hit a wall and couldn't really go any farther without some kind of major change, so I'm just going to say, for now, that 225 is my max bclk.

Thing is, 225 wasn't giving me the cpu/memory ratio that i wanted, so I backed it down a bit to 215. With cpu cores (15x multi) and memory (2:6) still set very low, I can run and pass LinX all day long....good.

Next step was the memory. I have 1600MHz Mushkin Redline ram, and, using a 2:8 ratio, that puts me at 1715MHz. At stock speed, timings are 6-7-6-18 72, so I loosened these up to 7-8-7-20 110. Just like before, I can run LinX all day without errors.

The problem comes in when I start increasing the multi. I'm trying to get the highest clock speed as possible, obviously, but at 215x21, I get errors in Linx around the 50 minute mark.

I've increased Vcore and it doesn't seem to help. I'm already at a fairly high level of Vcore, so I don't feel too comfortable pushing it much farther, even though I still have a little room left with temps. My hottest core, under full load, is 82C.

Also, when I get this error, I also lose my sound card (PCIe slot Fatal1ity card).

Here's my template. Any suggestions on how to get past this error??

Mother Board ( E-762 )
CPU ( 920 DO )
Memory ( Mushkin 1600MHz 6-7-6-18 )
Operating System ( Windows 7 x64 Home Premium )


Frequency Control
CPU Clock Ratio ( 21X )
CPU Host Frequency (Mhz) ( 215 )
MCH Strap ( Auto )
CPU Uncore Frequency (Mhz) ( 16x )
CPU Clock Skew ( 0 ps )
Spread Spectrum ( Disabled )
PCIE Frequency (Mhz) ( 100 )


Memory Feature       
Memory Speed (Standard )
Memory Control Setting ( Enabled )
Memory Frequency ( 2:8 )
Channel Interleave Setting ( 6 Way )
Rank Interleave Setting ( 4 Way )
Memory Low Gap ( Auto )
tCL Setting ( 7 )
tRCD Setting ( 8 )
tRP Setting ( 7 )
tRAS Setting ( 20 )
tRFC Setting ( 110 )
Command Rate ( 1t )


Voltage Control
EVGA VDroop Control ( Without VDroop )
CPU VCore ( 1.475 )
CPU VTT Voltage ( +200 )
CPU PLL VCore ( 1.800 )
IOH PLL VCore ( 1.80 )
DIMM Voltage ( 1.65 )
DIMM DQ Vref ( +0mV )
QPI PLL VCore ( 1.20 )
IOH VCore ( 1.40 )
IOH/ICH I/O Voltage ( 1.65 )
VTT PWM Frequency ( 610 KHZ )
CPU PWM Frequency ( 1333 KHZ )
CPU Impedance ( Less )
QPI Signal Compensation ( N/A )
ICH VCore ( 1.25 )



CPU Feature
Intel SpeedStep ( Disabled )
Turbo Mode Function ( Enabled )
CxE Function ( Disabled )
Execute Disable Bit ( Disabled )
Virtualization Technology ( Disabled )
Intel HT Technology ( Enabled )
Active Processor Cores ( All )
QPI Control Settings ( Enabled )
QPI Link Fast Mode ( Enabled )
QPI Frequency Selection ( 4.800 GT/s )
OC Recorvery ( Disabled )

One last note. I've heard of some people increasing PCIE a bit, but I have SSD's, and have been told that anything over 100 is bad. Not sure if that's true or not.

Guys what are max temps like?  I have been running at 4.1GHz for some time now, but took a moment to run a LinX test with 12GB of RAM (all) selected, and my core temps went to like 80C and my "CPU" temp went to 78C via EVGA E-LEET, yet my system is 24/7 stable and does gaming and media center without issue.  What gives?

Yea i was bummed out too. Mine came from a great batch but i'm going to need some serious cooling to get higher than 4.3ghz.

yea 4.5ghz with your ram at 2000mhz. pretty frickin sweet. I would get that back in a hearbeat.

The best way to assure stability is to run different tests while you sleep. Linx does the same test over and over while prime95 or OCCT have multiple test options. I remember running prime95 blend for 30 hours! I never run tests that long anymore. Most I do now is 7-8 hours of LinX and then 10 hours of prime95 blend, all while I sleep. If you want you can do small fft's one night, and large fft's another. If you can pass 3 hours of LinX and a full round of Prime95 blend, then you will "most likely" pass everything else.

Full round of prime95 blend takes about 10-11 hours. The test starts at 1024k, and it should take about 10 hours for it to get back to 1024k again.

Nice LP_sk8er, Now try speeding up that ram by lowering the timings.

The first number is the CAS Latency and it provides the most performance when lowered. for example 8-8-8-24 to 7-8-8-24.

I would try 8-8-8-24 first and then maybe 7-7-7-20

Chronic Great Job my friend,

nice work Chronic

Hey Chronic, just an update on how it went with my ram timings.  I tried 8-8-8-24, but it didn't show any improvement in the speed, it was exactly the same.

Next I tried 8-8-8-20, and the computer wouldn't boot.  Had to clear cmos and re-enter my bios settings.
Tried 7-7-7-20 and same thing, pc wouldn't boot, restored bios.

I'm not sure what else to really try, I think I might just stick with the stock timings, 9-9-9-24.  

What do you think?

this is great info. thanks!

I would like to know if CPU and VTT PWM frequency make any difference at all in overclocking. The only diffence i got was 3-4 C more on my PWM and 1-2 C more on Cpu when i changed from default to max values. Otherwise the vtt volt and vcore was exactly the same to pass linx. Any info on this?

So there is no real reason to play with them...Default is just fine.

helped me get 3.9 fairly easy with having to work one of the 2 days i got it dialed it.  Great guide thanks for the time you put into it.