**Official e8400/e8500 Retail OC Thread

[C-N]

Has anyone else had a chip that can't hit 4ghz? Raising volts has not helped me in any way. CPU-Z reads 1.456v right now and still I'm hitting a wall at 3960mhz.

Does raising any other voltages help much? I've tried raising VTT, NB and SB up a notch and it made no difference, but I'm wondering if they need to be raised more (don't know safe voltages and which are actually helpful).

I did disable vdroop and gained about 40mhz on the CPU at 1.400vcore.

I haven't had a chip that wouldn't run 4GHz but I have found a few that either run hot on low voltage or cool on high voltage.

My E8200 needed 1.475v in the bios to prime 4GHz yet it runs cooler than any of the E8400 & E8500's I've tested & they typically run 1.3~1.35v for 4GHz.

Here are my voltages for 500 x 8

CPU VID Control..................... - 1.47500v
CPU VID Special Add................. - Auto
DRAM Voltage Control................ - 2.27v
SB 1.05V Voltage.................... - 1.150
SB Core/CPU PLL Voltage............. - 1.55v
NB Core Voltage..................... - 1.45v
CPU VTT Voltage..................... - 1.10v
Vcore Droop Control................. - Disabled
Clockgen Voltage Control............ - 3.60v
GTL+ Buffers Strength............... - Strong
Host Slew Rate...................... - Weak
GTL REF Voltage Control............. - Enable
CPU GTL1/3 REF Volt................. - 60
CPU GTL 0/2 REF Volt................ - 60
North Bridge GTL REF Volt........... - 60