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DG33FB E8400 @ 3.3Ghz stok HSF

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October 3, 2009 2:52:24 PM

Well I was bored this morning, so I decided Id mess around with my Intel board that as we all know, doesnt support any over clocking abilities in the BIOS.

I downloaded SetFSB and soon after located and entered my boards clock gen frequency. This allowing me to manually set my FSB via the IC clock generator on the board.

I was able to hit 3.3Ghz on the stock HSF. Keep in mind this board has a locked memory divider of 5:6 so in order for me to obtain a 3.3Ghz clock I had to push my 800Mhz rated memory to approx. 915Mhz.

366 x 2 / 5:6 = 915Mhz

This pushed my 1333FSB to 366 x 4 = 1464Mhz

The only *tweak* per say, that I had to do in the bios was lax my timings on my memory from 5-5-5-18, to 6-6-6-18 in order for it to be stable at 915Mhz. ( 115 Mhz over its rated speed )



I looped 3DMark06 a couple times with no issues. With the stock HSF, the cpu temp capped out at 62*C. The board auto adjusted my CPU voltage to 1.27v. Nothing I could really do about that since the BIOS allows for NO modification other then memory timings.

All in all, it was fun tweaking and getting a stable over clock on a mother board that really was never designed for such a purpose.

Below is my before and after 3Dmark06 score ( 3Ghz on the right, 3.3Ghz on the left ) it seems that these E8400's REALLY do scale well. Even with an over clock as small at 10%. Cant wait for my new board to come in! Im looking forward to seeing some numbers with this cpu running at 4.0Ghz ;) 




( I might of had my GTX285 over clocked slightly higher on the 3.0Ghz run, I cant remember since it was a while back. But that would account for the slight difference in the 1st SM3.0 test. )
a b å Intel
a b } Memory
a c 197 K Overclocking
October 3, 2009 5:06:06 PM

You can push the CPU overclock higher if you do not try to overclock your RAM. Besides, overclocking RAM past the 1:1 FSB frequency to memory clock ratio does not really improve your real world performance.

You will gain more performance by running 1:1 and tightening your memory timing than try to OC the RAM and loosen the memory timing.

And in addition to replacing you motherboard with a better overclocker, I hope you are also planning on replacing the stock heatsink. The heatsinks that come with the 45 nm CPU's are half the size of the heatsinks that came with the older Core2's. There is very little reserve cooling capacity.
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Overclocking since 1978 - Z80 (TRS-80) from 1.77 MHz to 2.01 MHz
October 3, 2009 5:17:59 PM

Im quite familar with over-clocking :)  the point of this post is the fact the its a DG33FB mother board. Its an Intel board with a locked BIOS. There is nothing to allow for any modifications other then memory timings and fan control. If was I able to adjust my memory divider I would of set it to 1:1 and upped the FSB to 400 in order to hit 3.6Ghz. Which many have accomplished on the stock HSF.

This was just something I did out of bordom today. Just *because*. ;) 

Im also ordering new memory at a rated 1066Mhz speed. I plan on running a 444FSB x 9 = 4.0Ghz on the new mobo, this will be with a 5:6 divider effectively running my 1066Mhz memory at 1069Mhz.

444 x 2 / 5:6 = 1069Mhz

So it shouldn't be an issue at all. I'm also picking up an Arctic Freezer 7 Pro. My goal is to achieve this without having to up the CPU voltage past 1.3 - 1.35v

We shall see !
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October 4, 2009 1:02:26 AM

I decided to toy around a bit more. Managed to get 3.5Ghz via a soft overclock. Stock voltage on the cpu since I can't change it :p  I didnt keep it at this for long tho since under load I was hitting 69 - 70*C

The amazing part of it is my value brand memory which is running at 937Mhz with a 5:6 divider. Thats 137Mhz over its rated speed. :o 

3DMark06
Hardware details

General information
Operating system Microsoft Windows XP
System type 32-bit

Motherboard manufacturer Intel Corporation

Motherboard model DG33FB

Hard drive model HDT722516DLA380

Memory 2048 MB
Module 1 1024 MB
Module 2 1024 MB

Processor information
Processor Intel Core 2 Duo Processor E8400
Processor clock 3498 MHz
Physical / logical processors 1 / 2
Multicore 2 Processor Cores
FSB 333 MHz

Display information

Graphics card NVIDIA GeForce GTX 285
Graphics card vendor Nvidia Corp
Graphics memory 1024
Core clock 0
Memory clock 0
Driver name NVIDIA GeForce GTX 285
Driver version 6.14.11.8250
Driver status WHQL - FM Approved
Linked display adapters No

Result details

Benchmark settings
Program Version 3DMark06 Revision 1 Build 0
Resolution 1280x1024
Full Screen Anti-Aliasing None
Texture Filtering Optimal
Vertex Shader Profile 3_0
Pixel Shader Profile 3_0
Force Full Precision No
Disable Post-processing No
Force Software Vertex Shaders No
Force Software FP Filtering No
Disable Harware Shadow Mapping No
Colour Mipmaps No
Repeat Count Off
Fixed Framerate Off


Main test results

3DMark Score 16604 3DMarks
SM 2.0 Score 7638
SM 3.0 Score 8542
CPU Score 3297


Test Results

Graphics Tests
1 - Return to Proxycon 62.03 FPS
2 - Firefly Forest 65.26 FPS

CPU Tests
CPU1 - Red Valley 1.04 FPS
CPU2 - Red Valley 1.67 FPS

HDR Tests
1 - Canyon Flight (SM 3.0) 91.85 FPS
2 - Deep Freeze (SM 3.0) 78.99 FPS
October 5, 2009 2:11:20 PM

Managed to cap out at 3.6Ghz last night. I had to tweak my stock fan on the intel HeatSink. Plugged it into a 3pin AUX port. This upped my fans RPM's from 850 to a solid 1450 constant. It lowered my temps by 5*C

Scored a 17K in 3DMark06 with a max cpu core temp of 67*C

Main test results

3DMark Score 16964 3DMarks
SM 2.0 Score 7836
SM 3.0 Score 8650
CPU Score 3390


I backed it down to 3.3Ghz where it never exceeds 63*C ;) 
October 6, 2009 12:21:16 AM

if you want to test stability and temps try running Linx (linpac 20 runs) and prime95

the temps will go higher than 3dmark06
October 6, 2009 8:00:33 PM

Processor information
Processor Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz

Processor clock 3707 MHz
Physical / logical processors 1 / 2
Multicore 2 Processor Cores

Main test results
3DMark Score 17296 3DMarks
SM 2.0 Score 8039
SM 3.0 Score 8700
CPU Score 3490



FSB set at : 412
Stock: 333 +79

Effective FSB : 1647 Mhz
Stock: 1333 Mhz +314 Mhz

Memory at : 992 Mhz
Stock: 800 Mhz +192 Mhz ( this impresses me since its value ram )

Max Core temp never exceeded 63*C “core” ( This was all on STOCK cpu voltage! )
October 7, 2009 2:10:35 PM

I edited my previous post. New stable bench at 3.7Ghz ( soft OC )
October 26, 2009 3:05:15 PM

Triton05 said:
Managed to cap out at 3.6Ghz last night. I had to tweak my stock fan on the intel HeatSink. Plugged it into a 3pin AUX port. This upped my fans RPM's from 850 to a solid 1450 constant. It lowered my temps by 5*C

Scored a 17K in 3DMark06 with a max cpu core temp of 67*C

Main test results

3DMark Score 16964 3DMarks
SM 2.0 Score 7836
SM 3.0 Score 8650
CPU Score 3390


I backed it down to 3.3Ghz where it never exceeds 63*C ;) 


My machine runs 24/7 stable on 3.6 with stock. Idles 47C and MAX I have seen it hit after serious stress (COD4 on 1080p max settings for 3 hours) was 61C--but usually standard load temp is 53-55C.

Not bad for my first OC I suppose, but I would really like to see if I can get it a little higher. Going to water cool it I think, then see if I can hold stable 4.4ghz as others have.

Cheers! :hello: 
May 8, 2012 8:20:45 AM

Triton05 said:
Processor information
Processor Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz

Processor clock 3707 MHz
Physical / logical processors 1 / 2
Multicore 2 Processor Cores

Main test results
3DMark Score 17296 3DMarks
SM 2.0 Score 8039
SM 3.0 Score 8700
CPU Score 3490



FSB set at : 412
Stock: 333 +79

Effective FSB : 1647 Mhz
Stock: 1333 Mhz +314 Mhz

Memory at : 992 Mhz
Stock: 800 Mhz +192 Mhz ( this impresses me since its value ram )

Max Core temp never exceeded 63*C “core” ( This was all on STOCK cpu voltage! )




What parameters did u change in the SetFSB software ? And was there any change in the custom frequency i.e 3.3 Ghz set by you ?
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