Overclocking FX-60 Part II

[wilksj01]

Hi,

Thanks to all of you who helped me with the first stages of overclocking my AMD FX-60. I am now running my CPU at 14.5 multiplier at 1.475v giving me in the region of 2.9GHz. I have XMS4000 DDR500 memory which is running at 2.5 3 3 7 at DDR400.

Can anyone please advise me if this means it is running at its full 250MHz - DDR500 capacity and if not how would I go about reaching this.

Kind Regards.

[arthurleung]

It is running at DDR400 as you've said yourself.

I would say 260x11 at 1:1 memory to squeeze the last bit of performance out of the ram.
or 250x12 if your FX-60 could reach 3Ghz.

[BUFF]

It is running at DDR400 as you've said yourself.

with the 14.5 multi it's not but ~DDR386 as the memory controller always runs a whole integer.

but at DDR500 it's unlikely to run 2.5-3-3-7.
Horses for courses really.

[Pie_uk]

give 250mhz x 12 = 3ghz give that a go see what happens

[wilksj01]

I'll give it a go tonight. If I run it at 250MHz, what should I set the memory at?

[atmadden]

You are much better leaving at ddr400 as when you go to ddr500 you will need to loosen timings on memory so you will lose any performance gain. I have mem rated at ddr550 but it will only run this at 2.5 3 3 8. Whereas I run it at ddr 440 at 2 2 2 5 it peforms much faster. Tighter timings are the key. What is your ram rated at ddr 400 and ddr 500?

[wilksj01]

It's rated at ddr500 - 4 3 3 8 but if I run at ddr 400 I can get 2.5 3 3 7

[-ChEM-]

maybe you should run it at DDR440-460 to keep that cas2.5 timing and knock the others up a touch

those timings arent that good at DDR400 anyway, it obviously likes to run faster and as youre touching on 3ghz now you might get good performance with a bit of extra bandwidth

whatever you want to run it at, its basically:

HTT x multi = cpu speed
HTT x divder = ram speed

and presumably your bios will list the dividers in speeds relative to 200HTT
DDR400 = 1:1
DDR500 = 4:5

but when you raise the HTT your ram speed will increase proportionally, so if youre at 230HTT youll get DDR575 with the DDR500/4:5 divider

those are only approximate figures as theres some rounding that occurs in the real calculations but that will give you a rough idea, use CPUz to see what it actually comes out as or get a calculator and work it out beforehand

[wilksj01]

If I have the CPU at say 250MHz on a 12x multiplier at around 1.475v with the memory running at DDR400. What timings do you think would be realistic and stable?

[-ChEM-]

well if it goes to 4-3-3-8 automatically the first thing id try is to get rid of that CAS4 timing, to 3-3-3-8

then maybe 3-3-2-8 would work but i doubt it

i'd slow it down to whatever will work at 2.5-3-3-8, those are fair timings that wont slow down game performance much then whatever bandwidth you have above DDR400 rate is a bonus