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When overclocking...

post #1 of 8
Thread Starter 
Do you want the ram speed to match the FSB? dont you want them to send and respond at the same speed to enable them to work together???


And, What difference does looser ram timing compared to higher ram timing make when overclocking the processor?


And, when you overclock, theres an instability, you up the voltage to that particular area that your working on.... does this pretain to pci-e slots also when overclocking a graphics card?
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post #2 of 8
Thread Starter 
for the second question, I would like to know why also.
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post #3 of 8
for the FSB and RAM the optimal ratio would be a 1:2 because of the Dual Data Rate in the RAM but since that is not possible you should shoot for 1:1 , 4:5, 2:3 what determines this ratio many times is the speed of your RAM. yet to truely answer your question yes you want the speeds to match so you recieve no bottlenecking

question 2 : i dont have the expert knowledge to speak staight from my head on RAM timings but here is a good link invest the time to read it and you'll leanr a great deal
Code:
http://www.hardwaresecrets.com/article/26
question 3 : when OCing the PCIe slot you can increase the voltage but only slightly I'd suggest consulting with people who hav the same mobo/gfx combo as yourself before adjusting too much
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post #4 of 8
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ok, right now I have 2 gigs of 800mhz ram (4-4-4-12). I was planning on buying 2 more gigs and then upgrading to vista within the next month or so. Shoudl I invest in 4 gigs of 800mhz 5-5-5-15 ram and sell my 2 gigs so i can get a better overclock?
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post #5 of 8
no,you still want 4-4-4-12 2t dont go with 4gig unless you use vista 64 bit,but if i were you before going 64 bit id wait for more support ,i think you can get vista 32 bit retail and for a fee get 64 bit,preatty sure,someone will correct me if im wrong
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post #6 of 8
IMO, 32 bit vista is the way to go, although right now it sucks balls.
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post #7 of 8
Quote:
Do you want the ram speed to match the FSB? dont you want them to send and respond at the same speed to enable them to work together???
If possible? It all depends, I use a 4:5 ratio generally, some said that a 1:1 ratio is the way to go but in Intel land, bandwidth is what makes the difference, not a night and day difference but it does.
Then again, due to HyperTransport in the nForce chipset, I'm not sure what a 1:1 would be compared to any other ratio.

So, try a few different ratios and see which one you think it gives you that "edge", again, for me it's the 4:5.


Quote:
And, What difference does looser ram timing compared to higher ram timing make when overclocking the processor?
Some guy at XS ran some benchmarks with CAS 3, 4 & 5 for DDR2 and in the end the CAS 4 was faster than CAS 3 and CAS 5 was faster than CAS 3 except CAS 5 was not that far from CAS 4, so CAS 4 should be the best timings to use in DDR2.

Some will say 4-4-4-12 but I run mine at 4-4-3-5 which I find to be the best timings combination, personally. Or I'll recommend 4-4-4-8 or 4-4-4-10.


Quote:
And, when you overclock, theres an instability, you up the voltage to that particular area that your working on.... does this pretain to pci-e slots also when overclocking a graphics card?
There's more than just raising the voltage, you'll have to tweak several other settings in order to get there. For example enabling and disabling or running at auto or standard or normal. Locking PCIE to 105 and PCI to 33.33mhz.....and God knows how many more are there left in an nForce but I know there's quite a few.

Don't go too high on the voltages though, look for some other settings that may need to be disabled, like EIST and C1E when overclocking to more than 350fsb. Which in an nForce should be 1400.

When testing, you should write down all the changes that you've made and test and do more testing and more and more and more till you get it right. Write everything down, that way you won't forget.
post #8 of 8
Thread Starter 
Thats what im most confused about is the Ratio. How do you know what ratio works best? does heat of the overclocked part determine that?


And, Why have I read that looser timing, such as 5-5-5-15 would be better for overclocking?
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