- Oct 21, 2008
- 456
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- 18,790
Hi all,
I have been toying around with my new build, based on a p5q pro and a 9650. My goal was to run it at 4500mhz / ddr2 1000 (1:1). Unfortunately, while it boots at 500mhz fsb, it doesn't run very stable until the voltages are somewhat unsafe for 24/7 use. Mind you, it's a 1.25VID which seems like it enjoys higher voltages while producing lower heat than the 1.21VID's.
The issue I have is that the 1501 rev of the BIOS effectively creates an FSB wall at 460-470ish, no matter what voltages I use (or multi, for that matter). at 8x470, it doesn't load windows while at the exact same voltages of 9x470 on the 1306 bios, it'll load (with a 470mhz difference, of course). It'll even load up to 485ish in windows but isn't more than 5min prime stable at around 1.45v (I don't really want to go higher yet, it isn't burned in). Basically, what I'm trying to say is that the 1306 bios seems to be very stable for high overclocks while the 1501 sucks. I haven't trying the 14xx that happened in between so I am wondering if anyone else has some input regarding overclocked quads (or even duals) running on a p5q pro. Especially regarding bios versions.
While we're at it, would I gain any performance from switching out of the 1:1 ram timing of ddr2-940 to something higher, asynchronous and with relaxed timings? (in the high 1100's)
edit: Forgot to add that I'm currently running 470x9 at around 1.35-1.36 actual (cpu-z). LLC enabled, the core temps are between 27 and 35 with one sensor stuck at 41 (lol, go 3rd core). I haven't decided yet if I want to try to reduce voltages for 4.2ish ghz or if I want to push it faster with higher voltages.
I have been toying around with my new build, based on a p5q pro and a 9650. My goal was to run it at 4500mhz / ddr2 1000 (1:1). Unfortunately, while it boots at 500mhz fsb, it doesn't run very stable until the voltages are somewhat unsafe for 24/7 use. Mind you, it's a 1.25VID which seems like it enjoys higher voltages while producing lower heat than the 1.21VID's.
The issue I have is that the 1501 rev of the BIOS effectively creates an FSB wall at 460-470ish, no matter what voltages I use (or multi, for that matter). at 8x470, it doesn't load windows while at the exact same voltages of 9x470 on the 1306 bios, it'll load (with a 470mhz difference, of course). It'll even load up to 485ish in windows but isn't more than 5min prime stable at around 1.45v (I don't really want to go higher yet, it isn't burned in). Basically, what I'm trying to say is that the 1306 bios seems to be very stable for high overclocks while the 1501 sucks. I haven't trying the 14xx that happened in between so I am wondering if anyone else has some input regarding overclocked quads (or even duals) running on a p5q pro. Especially regarding bios versions.
While we're at it, would I gain any performance from switching out of the 1:1 ram timing of ddr2-940 to something higher, asynchronous and with relaxed timings? (in the high 1100's)
edit: Forgot to add that I'm currently running 470x9 at around 1.35-1.36 actual (cpu-z). LLC enabled, the core temps are between 27 and 35 with one sensor stuck at 41 (lol, go 3rd core). I haven't decided yet if I want to try to reduce voltages for 4.2ish ghz or if I want to push it faster with higher voltages.
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