Overclock.net › Forums › Intel › Intel CPUs › E8400 Overclocking
New Posts  All Forums:Forum Nav:

E8400 Overclocking - Page 3

post #21 of 24
Yes, I do.

Is that a C0 or a E0 stepping?

On my board (a Maximus Formula flashed to the Rampage Formula 0701 BIOS, as they're 99% the same board), I had my previous Core 2 Duo E8400 (C0) to a maximum of 4.32GHz, and then I think the RAM limited me from going further. I can't recall what I needed for 24/7 stable use regarding voltage with it, but if it helps, I found these screenshots digging through my old ones.





The second might not be 100% stable, but if my old C0 even booted 4.32GHz at 1.4V before it could go further due to RAM, I hope you at least shouldn't need any more for 4.0GHz.

I hit the same FSB wall with my Core 2 Duo E8600 at 4.8GHz, so I doubt it's the board. My 800MHz just tops out at 960MHz I guess. Your board, and likely your CPU, can do it. If you have 1066MHz RAM, there's probably no reason you shouldn't get 4.0GHz.

I did it with a C0 stepping, so if you have an E0 stepping, it should be even simpler.

Try the colored settings for starters.
Quote:
Originally Posted by Vitaminx View Post

Asus Rampage Formula 0803 BIOS


Ai Overclock Tuner [Manual]
OCfrom CPU level up [Auto]
CPU Ratio Setting [9.0]
FSB Strap to Northbridge [266MHz] (400MHz)
FSB Frequency [425] (450MHz)
PCIE Frequency [100]

DRAM Frequency [DDR2 - 1066MHz] (maybe try 900MHz so it's 1:1)
DRAM Command Rate [Auto] (2T)
RAM Timings [5-5-5-15]
DRAM Static Read Control [Enable] (maybe try auto?)
Ai Clock Twister [Auto]
Ai Transaction Booster [Manual] (Maybe try auto)
Common Performance Level [8.0]

CPU Voltage [1.35v] (see screenshots above, you can try raising it some but you shouldn't need to set it beyond 1.4V in the BIOS unless it's a really bad chip)
CPU PLL Voltage [1.54v] (I set it to 1.5V which is the lowest and it overvolts it to ~1.58V, and you shouldn't need to touch this for these clocks so set it to 1.5V)
North Bridge Voltage [1.43v] (mine did it at ~1.394V [1.370V set in BIOS], mine overvolts by ~.024V from what is set)
DRAM Voltage [2.00v]
FSB Termination Voltage [1.26v] (If your BIOS is like mine, this really gives it ~1.15V which is good and the same as what I used)
South Bridge [Auto] (1.05V/lowest)
SB 1.5v Voltage [Auto] (1.5V/lowest)
Loadline Calibration [Disabled]
GPU GTL Voltage Reference [0.63x]
NB GTL Voltage Reference [0.67x]

CPU Spread Spectrum [Disabled]
PCIE Spread Spectrum [Auto] (I have it disabled)
CPU Clock Skew [Auto]
NB Clock Skew [Auto]
Edit: I just read the whole thread and I see you may have 800Mhz RAM. If so and it can't do 900MHz, that is what's limiting you.
Edited by Princess Garnet - 5/11/11 at 5:10am
post #22 of 24
Thread Starter 
It's C0.
EvuL Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-3770K Ivy Bridge GIGABYTE GA-Z77X-UP5 TH EVGA GeForce GTX770 SuperClocked 2GB G.SKILL Ripjaws X Series 16GB (2 x 8GB) DDR3 1600 
Hard DriveHard DriveCoolingOS
SAMSUNG 840 Pro Series 256GB  2xSAMSUNG Spinpoint F3 1TB Thermalright Silver Arrow SB-E Windows 7 Professional 64-bit 
MonitorKeyboardPowerCase
Dell UltraSharp U2713HM Deck Legend - Ice (Linear) CORSAIR Professional Series Gold AX750 SilverStone Fortress Series FT02B-W 
MouseAudioAudio
Logitech G400s NuForce Icon HDP Sennheiser HD 650 Headphones 
  hide details  
Reply
EvuL Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-3770K Ivy Bridge GIGABYTE GA-Z77X-UP5 TH EVGA GeForce GTX770 SuperClocked 2GB G.SKILL Ripjaws X Series 16GB (2 x 8GB) DDR3 1600 
Hard DriveHard DriveCoolingOS
SAMSUNG 840 Pro Series 256GB  2xSAMSUNG Spinpoint F3 1TB Thermalright Silver Arrow SB-E Windows 7 Professional 64-bit 
MonitorKeyboardPowerCase
Dell UltraSharp U2713HM Deck Legend - Ice (Linear) CORSAIR Professional Series Gold AX750 SilverStone Fortress Series FT02B-W 
MouseAudioAudio
Logitech G400s NuForce Icon HDP Sennheiser HD 650 Headphones 
  hide details  
Reply
post #23 of 24
Those usually run slightly warmer and/or need more voltage than E0, but my values above were with a C0 as well, so start there and report back on where that gets you.
post #24 of 24
Thread Starter 
Quote:
Originally Posted by Princess Garnet View Post
Those usually run slightly warmer and/or need more voltage than E0, but my values above were with a C0 as well, so start there and report back on where that gets you.
Ok, I'll give it a try later and post back.
Edited by Vitaminx - 5/15/11 at 3:32pm
EvuL Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-3770K Ivy Bridge GIGABYTE GA-Z77X-UP5 TH EVGA GeForce GTX770 SuperClocked 2GB G.SKILL Ripjaws X Series 16GB (2 x 8GB) DDR3 1600 
Hard DriveHard DriveCoolingOS
SAMSUNG 840 Pro Series 256GB  2xSAMSUNG Spinpoint F3 1TB Thermalright Silver Arrow SB-E Windows 7 Professional 64-bit 
MonitorKeyboardPowerCase
Dell UltraSharp U2713HM Deck Legend - Ice (Linear) CORSAIR Professional Series Gold AX750 SilverStone Fortress Series FT02B-W 
MouseAudioAudio
Logitech G400s NuForce Icon HDP Sennheiser HD 650 Headphones 
  hide details  
Reply
EvuL Machine
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7-3770K Ivy Bridge GIGABYTE GA-Z77X-UP5 TH EVGA GeForce GTX770 SuperClocked 2GB G.SKILL Ripjaws X Series 16GB (2 x 8GB) DDR3 1600 
Hard DriveHard DriveCoolingOS
SAMSUNG 840 Pro Series 256GB  2xSAMSUNG Spinpoint F3 1TB Thermalright Silver Arrow SB-E Windows 7 Professional 64-bit 
MonitorKeyboardPowerCase
Dell UltraSharp U2713HM Deck Legend - Ice (Linear) CORSAIR Professional Series Gold AX750 SilverStone Fortress Series FT02B-W 
MouseAudioAudio
Logitech G400s NuForce Icon HDP Sennheiser HD 650 Headphones 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › E8400 Overclocking