E8500 Overclock

Flanagan · Sep 14, 2009

Can i get an expert here

to double check me on these overclocking settings? Right now it seems to be stable. Prime ran for seven or eight hours last night and the temps were fine.

The only thing im unsure of is the "MCH Frequency Latch....[ Auto ]". Should this be set to auto like it is now or 333 or 400? Not sure what that actually does being that the Memory Multiplier on 2.00D sets me at 400.

Thank you in advance for any help...

Code:

Code:

Robust Graphics Booster.........................[ Auto ]
CPU Clock Ratio.................................[ 9  x ]
Fine CPU Clock Ratio............................[ + .5 ]

******Clock Chip Control******

CPU Host Clock Control..........................[ Enabled ]
CPU Host Frequency (Mhz)........................[ 400 ]
PCI Express Frequency (Mhz).....................[ 100 ]
C.I.A 2.........................................[Disabled]

******Advanced Clock Control******

CPU Clock Drive..........................[800mV]
PCI Express Clock Drive................[900mV]
CPU Clock Skew..........................[0ps]
MCH Clock Skew..........................[0ps]

******DRAM Performance Control******

Performance Enhance.............................[ Standard ]
MCH Frequency Latch.........................[ Auto ]
System Memory Multipler.........................[ 2.00D ]
DRAM Timing Selectable..........................[ Manual ]

CAS Latency Time................................[ 4 ]
tRCD............................................[ 4 ]
tRP.............................................[ 4 ]
tRAS............................................[ 12 ]

******Motherboard Voltage Control******

Load-Line Calibration...........................[ Disabled ]
CPU Vcore         [ 1.25 ]...................[ 1.3125v ]
CPU Termination   [ 1.20    ]...................[ 1.280v ]
CPU PLL           [ 1.50    ]...................[ 1.50 ]
CPU Reference     [ 0.760   ]...................[ auto ]

MCH Core          [ 1.100   ]...................[ 1.240v ]
MCH Reference     [ 0.760   ]...................[ 0.79v ]
MCH/DRAM Reference [ 0.900   ]...................[ auto ]
ICH I/O           [ 1.500   ]...................[ auto ]
ICH Core          [ 1.100   ]...................[ auto ]

DRAM Voltage     [ 1.800v]...................[2.000v]
DRAM Termination [0.900v]...................[auto]
Channel A Reference [0.900v]................[auto]
Channel B Reference [0.900v]................[auto]

Computer Specs:

Computer Type ACPI Multiprocessor PC
Operating System Microsoft Windows XP Professional 5.1.2600 (WinXP Retail)
DirectX 4.09.00.0904 (DirectX 9.0c)

CPU: Intel Core 2 Duo E8500
Motherboard Name: Gigabyte GA-EP45-UD3R
Motherboard Chipset Intel Eaglelake P45
DIMM1: Crucial Ballistix Tracer BL25664AL80A. 2GB 240-pin DIMM DDR2 PC2-6400
DIMM3: Crucial Ballistix Tracer BL25664AL80A. 2GB 240-pin DIMM DDR2 PC2-6400
BIOS Type Award Modular (08/31/09) F11

Display:
Video Adapter NVIDIA GeForce GTX 275 (896 MB)
Monitor Dell 2208WFP (Digital) [22" LCD]

Multimedia:
Audio Adapter Realtek ALC889A @ Intel 82801JB ICH10 - High Definition Audio Controller

Storage:
Western Digital Caviar Black WD6401AALS 640GB 7200 RPM 32MB Cache SATA 3.0Gb

Acoma_Andy · Sep 14, 2009

What FSB are you at now? And if you want to clock it higher, you probably are going to need to loosen the memory timings to 5-5-5-15.

The MCH frequency latch sets looser timings on the NB, 333 and 400 are usually the best choices. Keep in mind that changing it to 333 or 400 might change your memory multiplier if it's higher then 2.00.

Flanagan · Sep 14, 2009

Im not looking to go any higher. If this will stay stable for me im happy with the 3.8ghz. This is where im at now:

Being that i don't wish to go any higher, do you suggest i leave everything as is, or set the MCH Frequency Latch.........................[ Auto ], to a manual setting?

Acoma_Andy · Sep 14, 2009

Well I think at the 400 latch you get the 2.66 memory multiplier (one of the choices). You could keep the CPU at 3.8Ghz and overclock the memory to 1066mhz by setting the memory multiplier to 2.66. If you want to do this, you have to change the memory timings to 5-5-5-15 and you may need to raise the DRAM voltage from 2.0 to 2.04v.

darklink · Sep 14, 2009

I had a E8500 and ASUS P5Q-E and with about the same voltage settings that you have on your CPU and NB, I was able to squeeze 4.2GHz stable out of my CPU. All of your settings look fine and you can keep the MCH frequency at auto, which would be 333 on the P45 chipset. Setting the strap to 400 would most likely raise the tRD setting on the board which would increase latencies and thus make the system slower. If you are stable where you are at I would just raise the multi on your CPU and see if you can squeeze some more out of it.

NoGuru · Sep 14, 2009

Acoma has you on the right track. Why don't you post in the EP45 section? http://www.overclock.net/intel-mothe...guide-677.html
Seem like MCH might need a bump up.

Flanagan · Sep 14, 2009

Thanks for the link. Seems like alot of folks are using 1.28, 1.30 on the MCH.

Im gonna bump it to 1.28 and leave the rest as is. Seems stable, and i'm happy going from 3.1 to 3.8. I read that 1066 on the ram is just a slight upgrade, and hardly noticable. So im gonna leave it and bump the MCH to 1.28,

Thanks for your time...

NoGuru · Sep 14, 2009

Let me just make sure your doing it correct.

You tested prime95 with small ftt's.

If that passes 8 to 12 hours then you use blend same amount of time.

Then Large ftt's. This should tell you if it is stable.

Acoma_Andy · Sep 14, 2009

Quote:

Originally Posted by Flanagan

Thanks for the link. Seems like alot of folks are using 1.28, 1.30 on the MCH.

Im gonna bump it to 1.28 and leave the rest as is. Seems stable, and i'm happy going from 3.1 to 3.8. I read that 1066 on the ram is just a slight upgrade, and hardly noticable. So im gonna leave it and bump the MCH to 1.28,

Thanks for your time...

At 400FSB you could probably run 1.24v MCH and 1.24v CPU termination or even less.

darklink · Sep 14, 2009

Quote:

Originally Posted by Acoma_Andy

At 400FSB you could probably run 1.24v MCH and 1.24v CPU termination or even less.

Good point. I didn't even realize that when I posted before. With what he currently has for voltages I was up around 475MHz on the FSB. I never had to go over 1.3 for the FSB termination voltage. Though my NB was at 1.36v but that was only to ensure a tRD of 8 with memory running at 1140MHz.

I would say your right about the 1.24v or even less. 400MHz FSB should be easily attainable at almost stock voltage. I would say maybe even try 1.2v on the NB and 1.22 for the FSB term voltage and see what happens.

Wartheridon · Jun 23, 2012

HI guys, im new in foruns and kinda noob at overclock, anyway i like to share what i have done and need some advices:

PSU: Corsair 600w
MB: Asus Rampage Extreme
Cpu: Intel Core 2 Duo e8500 (3.16 Mhz)
VGA: Gigabyte Gtx 460 SE 1gram DDR5
Ram: Corsair 2x2 4GRAM ddr3 1600

ON bios i just push FSB to 433, and push ram

i need some advices

tks for your time and suport

E8500 Overclock

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