Originally Posted by gagarin77
For the second time I flashed Bios with microcodes, but I couldn't find the one I did earlier on my HDD so I downloaded official bios and patched it again.
I will just say that some people are crazy. I saw a video on yt with a guy making an OC of Q9550 on P5Q3 vanilla mobo and he had NB at 1,60V. Stock voltage is 1,1V for P45. I thought that such voltage requires at least water cooling, but he doesn't even have a fan on NB radiator and claims it is 24/7 setup
I ran my P5Q Deluxe NB@1.4V daily for several months on end.
I did this for the purpose of running a lower Performance Level aka TRD (Northbridge latency setting) than normal. On S775 systems, system performance is dependent on the Northbridge latency.
A detailed explanation of this can be found below:
The safe NB voltage does NOT depend on specs, but rather, on the quality of the board and the size of the Northbridge heatsink. Intel's spec of 1.1V was issued for cheap boards with a small heatsink over the NB.
Naturally, higher quality motherboards with pipes and large NB heatsinks, are able to sustain higher NB voltages 24/7. 1.6 NB voltage was used by ASUS Rampage series motherboards , the DDR3 versions of which provided the absolute best performance for S775.
BOTTOM PHOTO: Intel X48 Rampage Formula top-end mobo ($500). Note the absolutely massive NB heatsink below the CPU socket.
MID PHOTO: Intel P45 Express ASUS P5Q Deluxe high-end motherboard ($350). Note the massive NB heatsink below the CPU socket.
TOP PHOTO: Cheap Gigabyte EP45-DS3R ($120). Note the small NB heatsink and the absense of pipes.
Lower TRD setting was the reason my QX9650 on an ASUS P5Q Deluxe yielded the highest Physics Scores at 3D Mark.com for a frequency of 4050 MHz . The Physics Score is dependent on CPU and Memory performance, not Graphics. I also beat everyone here including Davtylica (one of the early S771 modders) at 3D Mark 11.com Physics Score for the same reason.Edited by Arxontas - 4/3/14 at 2:19am