Less FPS after Overclocking - OC Beginner needs help.

[Rukjor]

Hello All,
 

saying, "He's no good for anything anymore." I got a friend's old PC.
Just for fun, I wanted to overclock the PC a bit and then show him that the PC is still usable.

 

My problem is that although I overclock the CPU a lot, I get less performance.

 

The system:
ASUS P5K motherboard
E6400 Intel Core Duo
4x 2GB DDR2 800Mhz
GT520 graphics card
be quiet 500W Gold rated

 

I overclocked the CPU from 2.1 GHz to slightly over 3.2 GHz. A large cooler is installed of course.
I overclocked the GPU from 800Mhz (RAM 600Mhz) to 1000Mhz (640Mhz).

 

I overclocked the GPU first and thus already achieved 10% more points in the Sky Diver (3D Mark) benchmark.

Unfortunately, overclocking the CPU does nothing at all.

What am I doing wrong? (I am an OC beginner)

 

Attached is a picture of my settings.

 

Thank you!

 

 

[HQuan]

Hi, if you're beginner in OC, please use 3rd software instead of access and change the speed in BIOS! It's more dangerous. Change voltage instead.

 

 

 

[aDoomGuy]

The system is unstable.

 

You need to reset everything, then in increments raise CPU ratio if you can. Raise it only a little bit and test with Prime 95 small FFT's. Keep on raising it until P95 either crashes or spits out an error. When it does start raising CPU voltage in increments until stable again. If you can't adjust CPU ratio then do this with FSB but that may also make the RAM unstable because it also increase RAM speed so you may have to loosen RAM timings and up DRAM voltage as you go. Watch temps closely while you test with P95. You will also need to test with Memtest if you raise FSB. Repeat until you reach limit or happy. If you reach limit dial back down to last stable setting.

 

EDIT: If the BIOS have LLC (Load Line Calibration) you can also try to set that to a medium setting instead of raising voltage if P95 crashes or spits out error. 

[unclewebb]

10 hours ago, aDoomGuy said:

raise CPU ratio if you can

The E6400 has a locked multiplier. 

 

@HQuan This is an old school computer. You overclock these in the BIOS. His overclock settings are perfectly fine. It is not dangerous to overclock in the BIOS. If anything goes wrong and the computer does not start up, you can easily pull out the CMOS battery on the motherboard to reset the BIOS to default settings.  

 

10 hours ago, Rukjor said:

Unfortunately, overclocking the CPU does nothing at all.

If you are running a test that is not CPU dependent then you will not see any benefit from overclocking the CPU. If you want to see if overclocking the CPU makes a difference then you need to run a CPU dependent benchmark. For an older system like you have, try using an older single threaded benchmark like Super Pi.

 

https://www.techpowerup.com/download/super-pi/

 

Run this test a few times at default CPU MHz and then reboot and run the test again at 3200 MHz. Pretty sure you will see a difference. Make sure you are getting consistent results when making comparisons. Some benchmarks can vary significantly, especially when a CPU is over loaded and running at or near 100%. A 16 year old CPU with only 2 cores can be easily overwhelmed. This makes it difficult to get any sort of repeatable or meaningful benchmark results. 

 

You should also run CPU-Z in each situation to see what speed your memory is running at. The bios shows DRAM Frequency is set to Auto. I am not sure what speed your memory is running at. It would be better to manually adjust that setting and then boot up and double check your memory speed with CPU-Z. This way you can make sure you are running at the same memory frequency when overclocked for a fair comparison. 

 

 

[Guest]

5 hours ago, Rukjor said:

Hello All,
 

saying, "He's no good for anything anymore." I got a friend's old PC.
Just for fun, I wanted to overclock the PC a bit and then show him that the PC is still usable.

 

My problem is that although I overclock the CPU a lot, I get less performance.

 

The system:
ASUS P5K motherboard
E6400 Intel Core Duo
4x 2GB DDR2 800Mhz
GT520 graphics card
be quiet 500W Gold rated

 

I overclocked the CPU from 2.1 GHz to slightly over 3.2 GHz. A large cooler is installed of course.
I overclocked the GPU from 800Mhz (RAM 600Mhz) to 1000Mhz (640Mhz).

 

I overclocked the GPU first and thus already achieved 10% more points in the Sky Diver (3D Mark) benchmark.

Unfortunately, overclocking the CPU does nothing at all.

What am I doing wrong? (I am an OC beginner)

 

Attached is a picture of my settings.

 

Thank you!

 

 

 

I suggest reading a guide. https://www.overclockers.com/forums/threads/howto-overclock-c2q-quads-and-c2d-duals-a-guide-v1-1.515316/

[Rukjor]

Thank you all for your help.

I finally did it.

Ratio 8x
FSB: 390

1,33 Volt
Ram on 937 MHz

Resulted in 3,12 GHz. 

 

I tried to get 3,2 GHz but it didnt work out and always crashed.
FSB 390 and/or the voltage seems to be the most this particular CPU / Mainboard wants to accept.

 

I got an improvement of 15% regarding to 3D Mark. And it will be even more, if I try my old GTX660 next. 
Because I think the GT520 is already holding back the E6400.

Its really making fun now, thank you!

 

See pictures, if you want