Solved Hot to overclock my C2D E7500 with 800mhz ddr2

December 28, 2013 at 02:18:54
Specs: Windows 7
I have

C2D E7500 2.93 GHZ 11 is the default multiplier..
4gb pc2-6400 (800mhz)
and my mobo is g31m-es2l

I know how to change the settings but not what the optimal settings are and I've read about 4 ghz..


See More: Hot to overclock my C2D E7500 with 800mhz ddr2

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#1
December 28, 2013 at 06:51:46
✔ Best Answer
CPU Clock Ratio - 8
CPU Host Clock Control - enabled
CPU Host Clock Frequency - 400
PCI Express Frequency - 100
System Memory Multiplier - 2.0

Increasing the FSB speed is where you'll gain performance. The above settings will clock the CPU at 3.2GHz @ 1600MHz FSB with the CPU:DRAM frequency ratio at 1:1. It's just a mild overclock of about 9% but the FSB speed has been increased by 50% & the RAM will be running in sync. If you want to clock the CPU even higher, simply raise the CPU Clock Ratio. But do it slowly, adding 0.5 at a time & testing for stability after each increase.


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#2
December 28, 2013 at 14:48:57
currently have it set at 300 mhz bus speed and 11 for the multiply appears pretty stable with prime.. gives me 3.3 ghz would that set-up you listed be more stable or better performance?

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#3
December 28, 2013 at 15:48:21
As I said in my other response, "FSB speed is where you'll gain performance".

8 x 400 will perform better than 11 x 300 because the FSB is running 33% faster. And for optimal performance, it's important to maintain a 1:1 frequency ratio. In other words, if the CPU freq is 400MHz, the RAM freq should be 400MHz.

You should be taking full advantage of your hardware capabilities. The board can handle 400MHz (1600MHz FSB), the CPU can handle 400MHz (1600MHz), & the RAM can 400MHz (800MHz DDR). So why are you running everything at 300MHz?


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Related Solutions

#4
December 28, 2013 at 15:49:09
Listen to riider, the buss speed of 300 will only five you an FSB 1200MHz so even though you are getting 3.3GHz on your OC, you are loosing on the buss speed and memory speed which will be out of sync or underclocked at DDR2 600.
Back down on your multiplier and first achieve your Freq. 400 which gives you the FSB 1600MHz, the CPU:RAM Ratio 1:1 at DDR2 800MHz (2.0 memory multiplier) and then raise the multiplier to 8 for 3.2GHz at a better FSB.Later you can try your multiplier 8.5 and possibly 9.0 but go slow and test for stability at each new setting while watching your temperatures.
Report back results for additional help tweaking the finer points.

You have to be a little bit crazy to keep you from going insane.

message edited by Fingers


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#5
December 28, 2013 at 17:54:39
because the processor was set up for slower than even I am running it at and wasn't sure how far I could step it up but also knew that the 300mhz was running stable since I ran prime 95. Thank you very much for you help!

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#6
December 28, 2013 at 18:25:55
Sweetness, so I couldn't get it to boot with a multiplier of 8 not sure why but 9 works great at 400mhz. I have a pretty awesome heat sink has 3 copper pipelines bent into a U effectively making it 6.. Using prime 95 (64-bit) my temperature peaked at 52 degrees Celsius but dropped to 51 degrees immediately and stayed there. Appears to be stable playing World of Tanks on it just fine.. now the temptation of stepping it up .5 is there :) You guys think I'm safe, mobo won't let it get past 60 degrees :)

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#7
December 28, 2013 at 18:28:11
btw Windows Score for both processor and ram (used it for funnies) went from 6.1 on default to 6.7 with the 300mhz to 6.9 C2D and 7.0 for the ram at 400mhz

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#8
December 29, 2013 at 05:53:00
Your CPU has an acceptable maximum temperature of 74.1C which I would always avoid, but if your Prime 95 temp is in the low 50'sC then you have no problem since it will be lower for just about everything else. My E7500 idles in the 30C's, runs most of the time in the 40C's and peaks just above yours and that system has been running daily for over 4 years that way. For daily use and gaming 9x400=3.6GHz is a very respectable overclock and I would just run it that way. If you want to try for higher, you certainly have the thermal overhead, just write down all your settings so you can go back to them if there is a problem or you decide to roll it back after discovering the max you can go.

You have to be a little bit crazy to keep you from going insane.


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#9
December 29, 2013 at 15:26:24
Thanks very much for the help and advice guys, this is my first experience overclocking anything, bought the board with that in mind with getting a quad core one day when they got cheap.. They never got that cheap :P

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#10
December 29, 2013 at 22:40:36
Hey quick question if either of you are still looking at this thread, if I bought a pcie 3.0 gcard would it work on my pcie 1.0 mobo? It would right, just at 1.0 speeds?

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#11
December 30, 2013 at 04:51:20
I am not 100% sure but I believe that you need to go with a PCIe 2.0 card because the 3.0 cards are backwards compatible with only 2.0 systems, not 1.0... Others will probably confirm this for you.

You have to be a little bit crazy to keep you from going insane.


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#12
December 30, 2013 at 10:14:57
Thank you Fingers, I wasn't sure if it worked like that or how I had suggested. I've read multiple forums and have noticed mixed replies. :\ But by what you just said, that confirms that I'm stuck with my 4870 :P which does fine for now. By the time I truly need a better gcard I'll have definitely seen the point in which I need a new mobo, cpu, and ram :)

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