which should i raise FSB or Multipler

November 6, 2010 at 09:45:48
Specs: Windows 7, AMD / 8g
I have a 965 AMD PhenomII x 4 BE OC -- Mutipler 18.5 with FSB @212. If I raise FSB to 215 system freezes. Do I lower the multipler so I can raise FSB or is it @ it's best performance level now. Right night 3.921MHz

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#1
November 6, 2010 at 09:50:03
Could you possibly list the whole specifications of your hardware ??

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#2
November 6, 2010 at 10:08:41
it's better to hit 4ghz, Amd abandon FSB long time a go, now they use HYPER TRANSPORT (HT). 212mhz is a reference clock not FSB. Raise cpu multi to 19, now it's 4028mhz.

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#3
November 6, 2010 at 12:09:48
If you increase the reference clock, you also increase the speed of the PCI, PCI-express, RAM, Hypertransport bus, etc. This is OK as long as you know what you're doing & stay within reasonable limits, but the whole idea behind the Black Edition is having an unlocked multiplier for overclocking.

Which type of RAM do you have? DDR2 or DDR3? What speed is it running at? Whenever you change the CPU multiplier, you also change the RAM speed. So you're going to have to fine tune the multiplier & reference clock setting to get the best combination. Why not 20 x 200MHz?


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#4
June 12, 2011 at 15:00:59
@Mickliq:

"Whenever you change the CPU multiplier, you also change the RAM speed. So you're going to have to fine tune the multiplier & reference clock setting to get the best combination. Why not 20 x 200MHz?"

Was this a typo? I was under the impression (especially from messing around with multi vs. ref. clock overclocking) that the only time you will increase your RAM speed from overclocking is if you change the ref. clock, not the CPU multi. You have helped me on my posts and you seem knowledgeable (you're on almost every post I've gone into) so I'm guessing that this was just a mistake.

@OIAMGOOD:

You have a Phenom II BE dude, there really isn't a need to overclock the ref. clock, and besides, doing so makes overclocking these chips MUCH more complicated, as it overclocks other components as well (as mickliq already stated). Just so that you are aware, my chip (same exact make and model) is running @4ghz as we speak, with a vcore of 1.45 (1.4 is stock). You may, depending on your config, have to bump the vcore as high as 1.5 or 1.55 to get it to run at 4ghz, but then again, you may be able to hit very close to what I managed to achieve. This overclock by the way is only though the multiplier (20x200mhz).

Antec Three Hundred Mid Tower

AMD Phenom II X4 965 3.4GHz @ 3.8GHz stock heatsink

2x2GB G.Skill DDR3 1333MHz @ 7-7-7-21 tRC 28 2T

Nvidia GTX 460 1GB MF'd by Nvidia @ 805MHz Core / 1.61GHz Shader


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