MCH is the northbridge yes, and ICH is the south bridge xD

I have the GA-EP45-UD3LR witch is similar to yours but the bios may be different.

Its best to set the RAM divider to something that will not OC your ram or as little as possible.

If you can find the MCH volt settings then set it to 1.200V or 1.220 if it will let you. as the default is 1.100v This is sometimes called FSB Voltage.

Try these settings..

Robust Graphics Buster - Auto
CPU Clock Ratio - 9 X
CPU Host Frequency - 450
PCI Express Frequency - 100 or Auto
Performance Enhance - Standard
Sytem Memory Multiplier - (witch ever gets you as close to 800 as possible)
DRAM Timing Selectable - Auto
System Voltage Control - Manual
DDR2 OverVoltage Control - +0.2 or +0.3
FSB OverVoltage Contril - +0.1 or +0.2
CPU Voltage Control - 1.3 to 1.35

Am out tonight, but will definately give it a go and use u for advice if ok, sounds like u know a bit more than me about o/cing, i wud love to get a stable 4.2 or even 4ghz, but at the min my threshold seems to be 3.8.

Ok ^^

3.8 May well be the limit of your mobo/cpu but can only try.

4ghz is doable with a nice big mug of tea and a night sat in front of the screen messing in the bios lol..

4.2... thats going to be hard to do.. and id be surprised if you get it to 4.2 AND stable xD

if its true these are hard to beat then

Will try a bit of overclocking tomorrow nite see how i get on, what stress test do you use? I've got prime95 and occt.

Edited by deleted (Thu 11-Mar-10 00:47:01)

Its not that, its that you have 800mhz ram and its going to limit you.

If you had 1066mhz ddr2 then 4ghz would be easy

I will have to have a look, I don't think the amount I spend on bringing the ram up to 1066 is going to warrant the performance increase, even with sellling the old 8gb (4x2gb) of OCZ reaper I've got in it.

So in essence with me running at a 2.00d ram timing on the mobo and the cpu at 422x9 giving me 3.8, the ram is running at 844 which it is handling, but anything over that, is what is causing me errors?

Forgot what ram i had in there, please see this pic, it does state that it needs 2.2v at 5-5-5 timing, so should i manually increase this on the mobo voltage control, it is up to 1066mhz, so realistically running 445 on the cpu that should easily acheive it on a 2;00D multiplier don't ya think?

Some of my settings atm just in case you need any of them:

MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster ...............: Auto
CPU Clock Ratio ..........................: 9x
Fine CPU Clock Ratio.....................:.0.0
CPU Frequency ...........................: 3.80ghz (423x9)


Clock Chip Control
Standard Clock Control
CPU Host Clock Control..................: [Enabled]
CPU Host Frequency (Mhz) ............: 423Mhz
PCI Express Frequency (Mhz) .........: Auto
C.I.A.2 .................................:[Disabled]


Advanced Clock Control [Press Enter]
CPU Clock Drive...........................: <<<700
PCI Express Clock Drive.................: <<<700
CPU Clock Skew (ps)....................: <<<
MCH Clock Skew (ps)...................: <<<


DRAM Performance Control
Performance Enhance...................: [STANDARD]
Extreme Memory Profile (X.M.P.).....: [Auto]
(G)MCH Frequency Latch...............: [Auto]
System Memory Multiplier ..............: 2.00D
Memory Frequency (Mhz) ..............: 844
DRAM Timing Selectable ................: [Auto]

Standard Timing Control
CAS Latency Time........................5
tRCD .........................................5
tRP'...........................................5
tRAS..........................................15


Motherboard Voltage Control

CPU
CPU Vcore�.���.........................:Auto
CPU Termination�.......................: Auto
CPU PLL�������.........................: Auto
CPU Referen.����.......................: Auto

MCH/ICH
MCH Core�����........................: Auto
MCH Reference�.��....................; Auto
MCH/DRAM Ref.�.......................: Auto
ICH I/O������........................: Auto
ICH Core����...��....................: Auto

DRAM
DRAM Voltage ��....1.800V............: Auto
DRAM Termination .�0.900V............: Auto
Channel A Reference 0.900V............: Auto
Channel B Reference 0.900V............: Auto

Advanced Settings
Limit CPUID Max. to 3.....................: [Disabled]
No-Execute Memory Protect............: [Enabled]
CPU Enhanced Halt (C1E)................: [Disabled]
C2/C2E State Support....................: [Disabled]
x C4/C4E State Support..................: [Disabled]
CPU Thermal Monitor 2(TM2) ...........: [Enabled]
CPU EIST Function.........................: [Disabled]
Virtualization Technology................: [Disabled]

Integrated Peripherals
Legacy USB Storage Detect ..............[Disabled]



--------------------------------------------------------------------------------
*** CPU Details ***
--------------------------------------------------------------------------------

Physical Processors: 1
Logical Processors: 2
Processor Vendor: Intel(R) Corporation
Processor Name: Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz
Additional Name: x86 Family 6 Model 23 Stepping 10
Popular Name: Core 2 Duo E8400
Frequency: 3800 MHz
Serial Number: 0001-067A-BFEB-&#&#-0C08-E3FD

--------------------------------------------------------------------------------
*** CPU Cache Details ***
--------------------------------------------------------------------------------

Cache Level I: 64 KB

--------------------------------------------------------------------------------
*** BIOS Details ***
--------------------------------------------------------------------------------

BIOS Vendor: Award Software International, Inc.
BIOS Type: AT/AT COMPATIBLE
BIOS Version: F8
Copyright: GBT - 42302e31
Date: 03/25/2009
Size: 1,024 KB

--------------------------------------------------------------------------------
*** Motherboard Details ***
--------------------------------------------------------------------------------

Motherboard Vendor: Gigabyte Technology Co., Ltd.
Motherboard Model: EP45-UD3R
Version: x.x
Ports: 10
System Slots: 2

--------------------------------------------------------------------------------
*** Memory Modules ***
--------------------------------------------------------------------------------

Memory Devices Present: 4
Memory Device # 0
Device Locator: A0
Bank Locator: Bank0/1
Memoty Device Type: Unknown
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB
Speed: 1 ns
Form Factor: DIMM
Memory Device # 1
Device Locator: A1
Bank Locator: Bank2/3
Memoty Device Type: Unknown
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB
Speed: 1 ns
Form Factor: DIMM
Memory Device # 2
Device Locator: A2
Bank Locator: Bank4/5
Memoty Device Type: Unknown
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB
Speed: 1 ns
Form Factor: DIMM
Memory Device # 3
Device Locator: A3
Bank Locator: Bank6/7
Memoty Device Type: Unknown
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB
Speed: 1 ns
Form Factor: DIMM
Total Installed: 8192 MB

Hope this helps?

Edited by deleted (Thu 11-Mar-10 20:09:37)

Ill have a read though that in a bit..

but since your ram can do 1066mhz just set that 2.2v in the bios (make it 2.24 if you can to compensate for vdroop)

and see if that will then let you put the fsb a bit higher to get the cpu to 4Ghz

If I set my fsb to run at 467mhz, to try and give me 4.2ghz on the processor, won't the ram be running at 934mhz, therefore running 132mhz lower than it's designed maximum therefore would I would of thought that I won't need to push more juice through it?

Also in relation to the CPU what is the

CPU Termination�.......................: Auto
CPU PLL�������.........................: Auto
CPU Referen.����.......................: Auto

and

MCH Reference�.��....................; Auto
MCH/DRAM Ref.�.......................: Auto
ICH I/O������........................: Auto
ICH Core����...��....................: Auto

Thanks Sean.

Edited by deleted (Fri 12-Mar-10 10:30:24)

Hi, yes it would be 137mhz less but the ram still needs the 2.2v as per its specs since we are approaching 1066Mhz

Go for 4ghz on the cpu first and if it works and its stable then go for 4.2Ghz

CPU ref im not sure what that is but CPU termination can help with stabilty on the vcore when overclocking, If im right it probaky only goes to a max of about 1v.

CPU PPL, the PLL chip is the clock generater chip on your motherboard. Id set this manually to between 1.550 (default) and 1.650 as the MAX. If to miuch power goes though this you can kill your CPU.

For the ICH core and I/O.. the ICH core is the voltage that the southbridge chip gets. and the I/O is the voltage the link between that and the MCH (northbridge) gets.

When overclocking these settings dont need to be changed as we are not overclocking the ICH. just the MCH and CPU.

Again i dont know what the MCH/DRAM Ref is.