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Higher multi or bus speed for my 955.

post #1 of 22
Thread Starter 
I have recently hit 4Ghz with my Phenom II 955 but with a multi of 20x, now i was wondering would i see any gains from lowering the multi and upping the bus speed to hit the same 4Ghz speed.

All i really use this rig is for gaming and everyday stuff but mainly gaming. I also have the CPU-NB OC'ed to 2800Mhz. See the screenie below for details and stress testing.

Capture3-1.jpg
Fear The Badger
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Fear The Badger
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post #2 of 22
the main benefit is that it will overclock your ram as well...it will also oc your northbridge so you will probably need to downclock that as well depending on how far it can go and remain stable
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post #3 of 22
I run 225 X 17, and despite what some on this board say I can't bottleneck 2X 6870s (and yes I tried).

For my setup more bandwidth, tighter memory timings are king IMO (DDR2 800 @ 900Mhz 4-4-4-15 2.1V).

I'm not a big fan of the easy "just up the multi" school of thought, sheer speed is useless, unless you can feed that CPU.

I'll prolly get flamed for saying this.

Edit: It looks like these C3 955s OC quite well.
Edited by Doom - 2/27/11 at 10:41pm
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post #4 of 22
It overclocks the memory, cpu/nb an HT link when you use the reference clock. All of which you can do with a good motherboard anyway. I only use the reference clock up to say 210 otherwise I will just bump the multi.
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post #5 of 22
Thread Starter 
Well what should i start with for the bus speed and multi?
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post #6 of 22
I will use the multi pretty much all the time. Only time I will use the reference clock is when I say run a benchmark and want to run my NB at 2900 rather then 2800 (14x) So I will use 14x208 an drop my CPU multi to match the speed I was at before.
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post #7 of 22
Get the max of your ram speed through the reference clock and than use the multiplier.
3930k
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3930k
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post #8 of 22
Increase the FSB to something that will allow you to keep NB, ram, etc where its at with their multiplers. That way youre not doing multiple changes at once and you can tell where instability is coming from.
You will see gains from the higher FSB alone, theyre not huge, but theyre there.

This is where OC'ing gets fun imo. Just playing with the CPU multiplier is too easy.
post #9 of 22
Quote:
Originally Posted by full_force1986;12551966 
Well what should i start with for the bus speed and multi?

lower the multi back to stock lower the ram multi and start pushing the bus. make sure to check your ram timings.
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post #10 of 22
Thread Starter 
OK then ill try raising bus not the multi and have some as stated by full_tilt ha.
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Fear The Badger
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