Overclocking Q8400 on DP45SG

Hey guys,
been reading over these forums for a couple weeks now pulling together pieces on how to oc my system. Current system specs from CPU-Z are:

Name Intel Core 2 Quad
Codename Yorkfield
Specification Intel(R) Core(TM)2 Quad CPU Q8400 @ 2.66GHz
Package (platform ID) Socket 775 LGA (0x4)
CPUID 6.7.A
Extended CPUID 6.17
Core Stepping R0
Technology 45 nm
Core Speed 2666.7 MHz
Multiplier x FSB 8.0 x 333.3 MHz
Rated Bus speed 1333.4 MHz
Stock frequency 2666 MHz
Northbridge Intel P45/P43 rev. A3
Southbridge Intel 82801JR (ICH10R) rev. 00
Graphic Interface PCI-Express
PCI-E Link Width x16
PCI-E Max Link Width x16
Memory Type DDR3
Memory Size 4096 MBytes
Channels Dual, (Symmetric)
Memory Frequency 666.7 MHz (1:2)
CAS# latency (CL) 9.0
RAS# to CAS# delay (tRCD) 9
RAS# Precharge (tRP) 9
Cycle Time (tRAS) 24
Row Refresh Cycle Time (tRFC) 74
Command Rate (CR) 2T
MCHBAR I/O Base address 0x0FED14000
MCHBAR I/O Size 4096

I have tried to increase the bus speed from 333.3 to 375 to get 3.0 ghz but i get a post error. Can anyone help? I tried messing with some one the voltages but that didnt fix anything. Im a bit lost here.

Thanks for your time!

Hi hammyboy21,

You can check what I did to reach 3.0 GHz on my Q8400 here:
http://www.tomshardware.com/forum/ [...] 8400-level

I have my sights set higher but it's a start...

Also,
"Correct me if I am wrong, but since I have DD3-1333 memory I cant increase my FSB past 333.3? Is that the limiting factor in this build?" -- simple answer: NO, it's not.

Hi hammy,

Late reply but here goes:

I did not change the memory timings. But I might go that way trying to push my cpu further.

Yes, I increased the FSB to 375. And I actually do have DDR2 PC6400 (800 MHz) memory.

When you increased your FSB, what memory ratio are you using? Did you up the Vcore some?
Did you reach any further since your last post?

And which motherboard do you have?