Custom 3.55 GHz CPU and DDR1775
Well, here you have it. This is our final overclocking stop on our stock cooling rig. While the previous profile would be nice to have with stock cooling, the memory and CPU were just too aggressive. To get a Prime95 stable overclock, I didn’t have to give much at all. While the DDR went from 1900 to 1775, I was able to tighten timings back to a CL 7. That’s a great trade, maybe better than the 1900. On the CPU side, the tweaked BCLK/multiplier went from 3.60 GHz to 3.55 GHz. Now we have a great overclocking profile that is both stable, cool, and uses only stock cooling.
The maximum temperature for this setup was 83°C. It is 4°C cooler than the previous benchmark and was achieved by lowering the core voltage by just 0.008V! Yes, that is eight-thousandths of one volt. A clear example of how important your voltage is when dealing with stock cooling. Overall, this machine hovers at 50°C during gaming. That has been tested on system hogs like Crysis, Far Cry 2, and Cryostasis.
The final numbers show a 27% (750 MHz) increase in CPU speed and a 33% (442 MHz) increase in DDR speed. This is significant since you can achieve it on your Core i7 860 right out of the box.
3.55 GHZ CPU
DDR 1775 7-8-7-24-1T
3.55 GHZ TEMPERATURES
| Hyper Threading | OFF |
| Prime95 | Stable |
| Core Voltage | 1.152 V |
| IMC/VTT Voltage | 1.2125 V |
| DRAM Voltage | 1.400 V |
| Sandra Bandwidth | 22.2 GB/s |
| Sandra CPU Math | 63.75 GOPS |
Thank you very much, I’ve found this very nice!
great post as usual!
Dude, this is a great article! Thanks for all the hard work. I couldn’t figure out why my temps were so high when I tried to overclock. After turning off hyperthreading it’s like night and day.
Just a question but why does the final screen grab say Intel Core i5?
That’s how Core Temp read the i7, as of version 0.99.5
photobucket has blocked the images, can you fix this or add a text based settings list?
thanks.