** Official MSI P6N SLI-FI & Platinum NF650i Owners Thread**

WJA96 said:
... say that the Micron vs ProMOS RAM was the thing that made the 1T vs 2T difference rather than the board. The only way for me to know for sure would be to buy an MSI P6N SLi, so I suspect I now have to do that for the sake of my sanity :rolleyes:

If there is a direct comparison then could you save me a bit of cash and time by posting it? Otherwise I'm off to the OcUK competitors for an MSI board!
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Whoops! You are entirely correct - I had thought that they would surely use the same memory etc. to keep the variable factors constant, but then I'd be wrong! :(

If it's any help, my memory will do 4-4-4-12-16-1T at 760Mhz and 1.9v. It's close enough that better memory would probably work.

Cheers,
Niall
 
ned14 said:
I'm still considering maybe to bump my multiplier up to 9x and lower memory to 720 to yield 3.24 Ghz. Worse bandwidth but similar latency with 1T. The 1.5v on the NB does concern me slightly.
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I decided to go with this in the end as it made cooling much easier. Previously the case temperature was getting very warm despite my many fans sucking air out - NVidia's chipset seems to consume several extra watts for every 0.25v increase and it doesn't seem to understand consuming less power when it's less busy.

So I lower the FSB to 1512Mhz which only requires 1.35v on the NB, both of which mean that the chipset gets a LOT less warm. You might think that a funny number, but then half that is 756Mhz for the RAM. At this speed my RAM is stable at 4-4-4-12-16-1T and with the 1T it is actually just as fast as (actually slightly faster than) 2T at 800Mhz.

The funny 1512Mhz is because /4*9 = 3.4Ghz on the nose and it seemed like a nice round number. To get this stable requires +0.2v on Vcore which sadly greatly increases power consumption. Nevertheless, when idle with speedstep enabled it STILL consumes only 100W and 44C (according to TAT). When fully loaded, it consumes a truly impressive 212W yielding a 89C core temperature (according to TAT) which of course causes occasional emergency clock throttling (as the core temperature breaks 90C).

This clock throttling effectively makes 3.4Ghz my maximum - I could go higher, but my processor would actually become slower as it overheats. I have tried divx encoding and such and because they rely on main memory, they never exceed 80C or so and thus no throttling. I think it'll be just fine for normal usage. It's certainly rock solid stable anyway ... and this time I orthosed it during sunlight to be sure! ;)

Sandra 2007 benchmarks:

Int=31597 MIPS
Float=21337 MFLOPS
Memory=7655Mb/sec @ 66ns latency

That 66ns latency is better than the previous best of 69ns latency with 2T command rate. 1T really is impressive in the synthetic benchmarks!

So that's that then.

Cheers,
Niall
 
tomo2big said:
One MUST disable C1E in the BIOS to get anywhere at all. This is buried in the BIOS options.

Cheers,
Niall
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hi all got my new rig up and runing, but got a strange prob i noticed that in cpuz my multi was at 6x so a bit of reserch on these forums tells me i need to disable seepstep and c1e? ive done speed step (altough its not called that on this board) but for the life of me i cant find c1e,ive been though the whole bios and i just cant see it please does anyone know how to find this???? thanks martin[/QUOTE]

Press F5 or maybe F4 (I think F4 changes the colour scheme) in various screens to show hidden options. I think C1E is in the CPU options off chipset options. Wherever the option to enable/disable the execute bit is.

Cheers,
Niall
 
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