How to set up GTL Ref Values for 45nm & 65nm

[mikeyakame]

[QUOTE=davidk21770;3362295]

A few questions...

1. The quoted part of your statement seems to belie your signature's 1st CPU (the RF at 434).

2. I've had a heck of a time getting 430 stable -- which is close to 433. I was planning to keep working up in 5 MHz steps. Are you suggesting that I should jump to 440 or even 445 to get away from the 433 clock harmonic?

(PS... found the CPU PLL Voltage on my DFI. I just didn't read the whole SB voltage line... d'oh. Was really surprised that I didn't have it on the tweaker's nightmare 'er... paradise ).

yeah i ended up using 431mhz fsb to stabilize that overclock and way too much compensation adjustment across the board to get it working comfortably.

ended up using 112mhz pci-e to prevent the nvidia pll clock signal on my gpu leaking into my cpu clock signal! lol it took me a couple of weeks to figure out that was the actual problem and even that was an accident. i was looking over the gpu's memory register dump to try and make sense of memory timing setting DWORD's in the bios for the unknowns and noticed the pll deviation for i think it was the shader clocks.

long story short I gave up and dropped to 431MHz it was manageable to get working as long as I isolated SBPLL from CPUPLL. I ended up using 1.76v CPUPLL and 1.65v SBPLL to work around the cross chatter between the NB and SB. It was a work around really, and performance was never consistent, i'd get variations of 5 - 10 gigaflops at times through 5 or 6 problems in linpack, during the same run.

i finished up last night stability testing my new settings I wanted to try out, and only took 2 or 3 reboots to make small adjustments to vtt and nb/cpu gtlref to pass 1hr of prime95 before i stopped it and crashed out.

the end result is 474mhz fsb on 12:10 divider, common PL of 7 with CHA PH1 pulled in to 6, 3318mhz cpu 7x multi 1.34v vcc, 1.55v vnb, 1.58v cpupll, 1.50v sbpll, 1.075v vsb, 1.36v vtt, cpu gtlref 0.65x, nb gtlref 0.63x, rest arent all that interesting.

performance is quite good with 3.32ghz and cache/memory latencies are better than I expected from only using 1140mhz 5-5-5-15 on ram. memory latency is down around 52.3ns with 9700 / 8600 / 9500 read / write / copy bandwidths.