OC nube

[Sgt Acid Puke]

Hi All
I'm building a new rig and have a couple of questions about OCing. I will be using an Asus P5Q Deluxe with a E 8500 Proc. I want to go as far as I can go without increasing the voltage. The Mb fsb is 1600/1333 Mhz and the E8500 fsb is 1333 Mhz. Will the board run at 1333 to match the proc 333x9.5=3.16 Ghz when I turn it on for the first time? Then if I bump the fsb to 1600 is my math correct 400x9.5= 3.8Ghz. Its not that easy is it?? Should I put the multiplier down to 8 while finding the limit for the board then move the muliplier up? Or keep going with the multi at 9.5?
Also I know all boards are different but how far past 1600 will it go? Is there a website where everybody post there OC results so I can get an idea what the limits are for this combo? I swore that I wasn't going to OC my new computer but the more I study about the componants and hang out here I'm thinking thats the first thing I'm going to do once its up and running.

[polobunny]

Originally Posted by Sgt Acid Puke

Hi All
I'm building a new rig and have a couple of questions about OCing. I will be using an Asus P5Q Deluxe with a E 8500 Proc. I want to go as far as I can go without increasing the voltage. The Mb fsb is 1600/1333 Mhz and the E8500 fsb is 1333 Mhz. Will the board run at 1333 to match the proc 333x9.5=3.16 Ghz when I turn it on for the first time? Then if I bump the fsb to 1600 is my math correct 400x9.5= 3.8Ghz. Its not that easy is it?? Should I put the multiplier down to 8 while finding the limit for the board then move the muliplier up? Or keep going with the multi at 9.5?
Also I know all boards are different but how far past 1600 will it go? Is there a website where everybody post there OC results so I can get an idea what the limits are for this combo? I swore that I wasn't going to OC my new computer but the more I study about the componants and hang out here I'm thinking thats the first thing I'm going to do once its up and running.

First thing first, put everything to manual. Many board have auto voltage adjustment and if you don't put these to manual, you will not be able to find the highest setting without voltage adjustment considering your board will be pushing the voltage up without you knowing.

Second, disable SpeedStep, C1E and EIST. Those are technologies integrated to the CPU to lower the multiplier, frequency and voltage when idle. This can create problems when overclocking and overall will simply make it more complicated for you to follow your achievements.

Third, find your highest FSB without increasing the voltage. You put the memory at it's lowest settings, sub-stock settings. You turn down the multiplier a few notches.
Once you have found your highest FSB, this tells you "how good" your board paired with this CPU is. This gives you of an idea of what could be limiting you, when you start overclocking your CPU.

Put back the FSB to stock, multiplier to stock but keep the memory underclocked. Go up a few notches. 100MHz jumps on the CPU frequency is good (not 100MHz on the FSB!). Run a stress test every 100MHz step to make sure your computer is stable. At the first sign of instability (abnormally long loading, instant reboot, blue screen, applications crashing) step back 50MHz and test again. If it doesn't crash, push up in 10MHz increments on the CPU and test between each.

Soon enough, you will find your CPU limit with no voltage adjustment. After that you can either give it more voltage or adjust your overclock by increasing the RAM frequency/lowering the CPU multiplier/increasing the FSB if necessary.

[Sgt Acid Puke]

OK once I find the max for the mobo and set it back to stock, is increasing the multiplier the only way to OC the cpu? I thought there was only 2 ways to OC the cpu #1 FSB #2 Multiplier. Are you saying to put the multi to stock 9.5 then raise the fsb around 10 mhz each time? That will raise the cpu up 95 mhz each test right?

[polobunny]

Originally Posted by Sgt Acid Puke

OK once I find the max for the mobo and set it back to stock, is increasing the multiplier the only way to OC the cpu? I thought there was only 2 ways to OC the cpu #1 FSB #2 Multiplier. Are you saying to put the multi to stock 9.5 then raise the fsb around 10 mhz each time? That will raise the cpu up 95 mhz each test right?

Yes I meant increase the FSB to overclock your CPU, sorry if that wasn't clear.

95MHz is right.

[Sgt Acid Puke]

Ok I have another rookie question. Would you get the most out of your cpu if you kept the multiplier at the max setting? The c2d e8500's multiplier is 9.5. Which would be faster? 333x9.5=3.16 or 395x8=3.16 or would they be the same speed? The way I understand it, is the cpu will complete 9.5 cycles for every cycle of the fsb. So it would seem to me that you want to keep the multi at the highest setting. With the mobo and cpu that I will be using I won't be able to push the fsb very far if I keep the multi @ 9.5 - 400x9.5= 3.8 Ghz.

[polobunny]

Originally Posted by Sgt Acid Puke

Ok I have another rookie question. Would you get the most out of your cpu if you kept the multiplier at the max setting? The c2d e8500's multiplier is 9.5. Which would be faster? 333x9.5=3.16 or 395x8=3.16 or would they be the same speed? The way I understand it, is the cpu will complete 9.5 cycles for every cycle of the fsb. So it would seem to me that you want to keep the multi at the highest setting. With the mobo and cpu that I will be using I won't be able to push the fsb very far if I keep the multi @ 9.5 - 400x9.5= 3.8 Ghz.

Why would you not be able to push the FSB further? The official "limit" for the FSB supported by the board is 400FSB, which does not mean you have to stop at 400 FSB.

As for your question, one is worth the other. Ultimately, once you are satisfied with your CPU overclock, I suggest you try to match your CPU:RAM ratio to 1:1 to get the more out of your RAM.

[Sgt Acid Puke]

I don't want to stop at 400 fsb, but if I keep the multiplier at 9.5 that pushes the cpu to 3.8 Ghz, 425 = 4 Ghz. My question is will the cpu preform better at the highest multiplier or would the performance be the same with a higher fsb and lower multi ? If there is no differance then what are the gains for having the fsb turned up higher? Does the chipset, sata, usb run faster?

[gvblake22]

Higher FSB's should offer better performance than the same clock speed with a lower FSB and higher multiplier because the memory (and memory bus) is running faster (unless you change the FSB:RAM divider).