- Joined
- Apr 25, 2012
First post!
I'm new to overclocking (never tried it until the other night). Read through the clunk's, graysky, and wolfram beginner's guides and got a good idea of it. I was overclocking fine when it came to booting and temps, until I realized the system wasnt stable cause there would be jitters... mainly there would be huge FPS drops in 3dmark.
Anyway, I am doing it on my 4-year-old build:
E6750
4x1GB G.SKILL DDR2-800 RAM F2-6400CL5D-2GBNQ (1.8-2.0V, 5-5-5-15)
Asus P5K-E WiFi AP mobo
EVGA GeForce 9800 GX2
COOLER MASTER Real Power Pro RS-750-ACAA-A1 750W Power Supply
Now this sounds like an entire noob question with a simple answer, but I have spent the last 2 hours googling and couldn't find one. I set my BIOS according to clunk's guide (http://www.clunk.org.uk/forums/overclocking/2-c2d-overclocking-guide-beginners-p5k-add.html). I set my ram timings manually to 5-5-5-15 and ram voltage to 1.8. I set my FSBRAM to a 1:1 ratio, for mine that is 333:667.
Here is the problem: When I overclock my FSB up to to 399 MHz, (DRAM 799 Mhz), I can benchmark in 3DMark and the FPS remains high and the final score raises. But as soon as I bring the FSB up one more interval to 400 MHz (DRAM 801 MHz), the FPS drops severely in 3Dmark, and the final score is about cut in half. The CPU score raises, but the SM2.0 and SM3.0 scores severly drop. Also I notice some jittering in the mouse, or trying to scroll down fast in a browser... which, according to what I've read, sounds just like basic symptoms of an unstable overclock.
I had started initially overclocking it far higher, to around 3.6 GHz, with boots, temps, and 8 hours of stress testing OK. I thought I had achieved a very successful overclock, but it was the 3DMark FPS that clued me that something was wrong.
Things I have tried:
I thought maybe it was the PCI-E bandwidth messing with the graphics card, although CPU-Z never said 1x instead of 16x. I tried setting the bandwidth to 100 and that did not help. I then set it back to auto, and tried increasing the RAM voltage to 1.9V. Did not help.
Before bringing the clock back down a notch, I went ahead and ran Memtest with the 400:801 set. I ran it overnight (about 7 hours) and had no errors.
I've heard of people getting to 3.6 and above with an E6750... Do I just need faster RAM? I know people clock their RAM faster than it's rated all the time, so I don't see how 1 Mhz over is causing the 3dmark score to immediately cut in half.
I'm pretty sure I've covered everything in excruciating detail, but if I'm forgetting anything, please let me know. Thank you!
I'm new to overclocking (never tried it until the other night). Read through the clunk's, graysky, and wolfram beginner's guides and got a good idea of it. I was overclocking fine when it came to booting and temps, until I realized the system wasnt stable cause there would be jitters... mainly there would be huge FPS drops in 3dmark.
Anyway, I am doing it on my 4-year-old build:
E6750
4x1GB G.SKILL DDR2-800 RAM F2-6400CL5D-2GBNQ (1.8-2.0V, 5-5-5-15)
Asus P5K-E WiFi AP mobo
EVGA GeForce 9800 GX2
COOLER MASTER Real Power Pro RS-750-ACAA-A1 750W Power Supply
Now this sounds like an entire noob question with a simple answer, but I have spent the last 2 hours googling and couldn't find one. I set my BIOS according to clunk's guide (http://www.clunk.org.uk/forums/overclocking/2-c2d-overclocking-guide-beginners-p5k-add.html). I set my ram timings manually to 5-5-5-15 and ram voltage to 1.8. I set my FSBRAM to a 1:1 ratio, for mine that is 333:667.
Here is the problem: When I overclock my FSB up to to 399 MHz, (DRAM 799 Mhz), I can benchmark in 3DMark and the FPS remains high and the final score raises. But as soon as I bring the FSB up one more interval to 400 MHz (DRAM 801 MHz), the FPS drops severely in 3Dmark, and the final score is about cut in half. The CPU score raises, but the SM2.0 and SM3.0 scores severly drop. Also I notice some jittering in the mouse, or trying to scroll down fast in a browser... which, according to what I've read, sounds just like basic symptoms of an unstable overclock.
I had started initially overclocking it far higher, to around 3.6 GHz, with boots, temps, and 8 hours of stress testing OK. I thought I had achieved a very successful overclock, but it was the 3DMark FPS that clued me that something was wrong.
Things I have tried:
I thought maybe it was the PCI-E bandwidth messing with the graphics card, although CPU-Z never said 1x instead of 16x. I tried setting the bandwidth to 100 and that did not help. I then set it back to auto, and tried increasing the RAM voltage to 1.9V. Did not help.
Before bringing the clock back down a notch, I went ahead and ran Memtest with the 400:801 set. I ran it overnight (about 7 hours) and had no errors.
I've heard of people getting to 3.6 and above with an E6750... Do I just need faster RAM? I know people clock their RAM faster than it's rated all the time, so I don't see how 1 Mhz over is causing the 3dmark score to immediately cut in half.
I'm pretty sure I've covered everything in excruciating detail, but if I'm forgetting anything, please let me know. Thank you!
Last edited: