sileb13 Posted October 13, 2010 Posted October 13, 2010 (edited) Hey, first off, I would consider myself quite novice when it comes to overclocking... I get the basic idea, and it was much easier when I had an OC-friendly E2180, but now I have a Q8400 and it's not so nice. I have a stable overclock at ~3.2GHz with temperatures rarely going over 50 degrees C and no errors in prime95 after about 12 hours of testing, but I have hit the well known wall at 400MHz on the FSB. I literally cannot get my machine to boot at 401. I have done quite a bit of research and I now realize the joys of overclocking a P45 board past 400MHz and it is very difficult. I know this is completely system-unique but I would appreciate any help at all. Here are my specs: Processor: Intel® Core2 Quad CPU Q8400 @ 2.66GHz (4 CPUs), ~3.2GHz CPU Cooler: Coolermaster V6 Graphics Card: SAPPHIRE 100283-3L Radeon HD 5770 1GB Memory: G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 (Model F3-12800CL9D-4GBRL) Motherboard: GIGABYTE GA-EP45T-USB3P Operating System: Windows 7 Professional 64-bit Edited October 13, 2010 by sileb13 Share this post Link to post Share on other sites More sharing options...
IVIYTH0S Posted October 14, 2010 Posted October 14, 2010 did you try dropping the multi to see if it's truly the FSB holding you back?? Share this post Link to post Share on other sites More sharing options...
DrTiCool Posted October 14, 2010 Posted October 14, 2010 as previous post mentioned you should check multiplier, also check ram in bios, it's overclocking alongside with cpu, in that case downgrade the speed on rams. I got pretty similar setup E8400 @ 4.3GHz, GB board EP-45 UD3R, 2x2 1066 DDR2 ram, customized CM V8 cooler, HAF 932. I don't think that P45 is holding you back Share this post Link to post Share on other sites More sharing options...
IVIYTH0S Posted October 14, 2010 Posted October 14, 2010 as previous post mentioned you should check multiplier, also check ram in bios, it's overclocking alongside with cpu, in that case downgrade the speed on rams. I got pretty similar setup E8400 @ 4.3GHz, GB board EP-45 UD3R, 2x2 1066 DDR2 ram, customized CM V8 cooler, HAF 932. I don't think that P45 is holding you back OH YEAH! Make sure your memory isn't going over it's stock rated speeds! Share this post Link to post Share on other sites More sharing options...
AIinc Posted October 15, 2010 Posted October 15, 2010 From what I've seen, most P45 Gigabyte boards have a strong FSB, seen quite a few go to 480, to over 500. Most of what I've seen needed a bit of tweaking to the FSB VTT, and CPU PLL But as stated above, make sure your memory is not exceeding it's stock limits! That will shut you down quick! Share this post Link to post Share on other sites More sharing options...
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