I'd start by using TAT worklevel load (100 percent on both cores), to be sure your cooling (HSF) can handle even stock speed loads before over clocking your CPU. Even running Prime95 for a few hours can help determine if you have any hardware errors to begin with.
Once your sure you have your hardware installed correctly, I would read Wusy's OC guide for C2D.
The real question is, how far do you want to push your CPU, or do you have a certain speed in mind?
The CPU is running at 25C under load times, and I want to achieve maybe 2.6Ghz from it (its 1.8 stock). Is that too far of a jump?
25c cant be right unless you live in Antarctica.
You could definately OC the e4300 to 2.6ghz with stock cooling, although I would recommend getting Aftermarket cooling such as an Arctic Cooling Freezer 7 Pro for $30-35. With that HSF you should be easily able to OC to 3ghz. I have a friend with an ACF7P who's Pentium D 805 is at 3.7ghz.
For the GPU: I got that same GPU today from a friend. It came with a Zalman VF700CU aftermarket heatsink. My friend said that he OC'd his card quite well with the Zalman, and that the stock heatsink is crap.
You can OC the GPU with Coolbits or other programs
Getting aftermarket cooling for either the CPU or GPU has several benefits:
1. Lowers Temps for better OC'ing
2. Lower Noise
3. Lower temps for longer life
i would suggest the ACF7P for the CPU and a Zalman VF700 or VF900 for the GPU.
Okay, I overclocked it from 1.8Ghz to 2.11Ghz at 1:1 ratio and 235 Bus Speed. But now it won't let me go any further. Whenever I go to change the Bus speed to 236 or higher it then restarts as normal but it starts the rig up at 200 stock bus speed instead. I don't know why. If I had to take a guess I would say it was my RAM now holding this machine back.
And if anyone is interested this is what I am at now:
Or you could just do a screen shot on the CPU page, and Memory tab.
One thing that could be holding you back, is perhaps the memory voltage. I have mine set to 2.1 volts. All other voltage should be fine at their stock settings since it looks like your gradually increasing speed, instead of jumping directly to the speed you want.
Now with the memory, after going through some good info provided from another thread, to get a 1:1 ratio, try to be sure your running that DDR2 667 memory at 533 speed. I did have a blank screen problem, but I got it to finally boot. That was my main problem, I didn't think it would work.
For what I have setup for my P6N SLI 650i MB, I have the:
Memory Clock: 533
*Side note: my bios shows the full # spec's - so kinda confusing, so the FSB would be read 266 on other MB bios.
Now that is for a 2394mhz or 2.4 OC.
Not sure about the MB you have by gigabyte, if you have a ram multi, be sure to set it to 2, from what I understand.
And set the memory clock to 533. To sum up set:
1.) get CPU-Z so we all have a better lock at whats going on
2.) set your memory clock to 533 and if you have ram multi set to 2
3.) set memory voltage to 2.1 (shouldn't hurt it)
4.) leave FSB 235 for 2.11 OC to further test it with prime or othos.
5.) push FSB 245 to test that, and continue till you hit your target speed.
With those settings above, CPU-z should show your OC with 1:1 ratio, hopefully.
1 Open CPUz and click about tab
2 click on validation button
3 click save validation file ( desktop or anywhere you can find it)
4 on step 2, click on validation webpage.
5 fill out the info. from there you can copy the link. (you also get it via email)
Then just post the link on the thread. It would help us see better on what is going on.