Multipliers & Stability E6600 + mem timings explaination

[morgan]

this may be a noob question but which should be more stable / which is better to use if the system is happy?

3.2ghz by:

9 x multiplier, 355 fsb / 2 x system multiplier (mem @ 710Mhz)

or

8 x multiplier, 400 fsb / 2 x system multiplier (mem @ 800Mhz)


this is with e6600 / ds4 / geil PC6400C4

which is a better alternitive given the choice?



also can anyone explain exactly what the CAS 4-4-4-12 numbers mean?

for memory in order to overclock more what can I do with these timings to get more Mhz? I've been searching the forum and it seems that its the last number (ie the 12) that can be changed. ie if I reduce it to 8 the memory will be faster, but more unstable, or increasing it to 15 will slow it down....can anyone explain?

regards

 

[morgan]

cheers for the replies guys.

last night had a tinker.

Basically the quickest the cpu would go is 3.20 Ghz stable (@ 1.45V). I did this by trying 2 methods:

1). 9 x 356fsb = 3204Mhz, Mem @ 890Mhz (2.5 multiplier)

2) 8 x 400fsb = 3200Mhz, Mem @ 800Mhz (2 multiplier)

this is a DS4, E6600, G.Skill HZ mem @ 2.1V, +0.1 to chipset and fsb volts.

I think 3.2 is the limit of my chip, whereas the mem could go faster than 890.

Did benchmarks (pcmark) between method 1 & 2 and they were 8204 & 8232 respectively - ie pretty much the same....strange as I thought option 1 would be more responsive?....

any tips to get faster?...the chip temp doesnt really get past 54/56 deg and system temps are <30 deg...

cheers

 

[morgan]

I'm using the gskill hz 6400 memory also.

i need 1.425 volts to get 8x400 orthos stable and also need to adjust chipset voltages, but 9x356 is stable at 1.375 so i think that i'm going to stick with that

so the same setup as me? Wierd that these E6300 and E6400 seem to clock better than the E6600...

as for choosing 9x356 over 8x400...is your reason so you can run lower fan speeds/less noise or another reason?

what have you got your HZ memory running @ 2x=712mhz or 2.5x=890 mhz?