Tech Reaction

Few days ago arrived a new clocking toy. An Intel Core i5 661 CPU with Clarkdale cores. Haven´t tested it on air or water, I moved straight to single stage phase change cooling. Insulated the mobo with kneeded rubber, mounted the cooling and started to play.

Parts used in the test:

MSI P55-GD80 BIOS v1.7

2×2GiB Kingston HyperX 1600 CL8

Intel Core i5 661

Sapphire X1600Pro for CPU tests, MSI N260GTX Lightning for 3D Mark 03 test

Akasa 1200W 80+

Started to test the max BCLK.
After some restarts and VTT voltage rising to 1,392V I managed to get into Windows on 250MHz BCLK with 2 cores and HT enabled. Then I used the buttons for BCLK rising on the board and I got the max. validated BCLK of 253MHz.

After I found the BCLK limit I started to clock the CPU for max. frequency validation. First try I stopped at 5300MHz 1.64V. Damn!!! More no go. After a hour of freezing, rising voltages, lovering voltages a idea lighted up…what if the problem is the memory divider? And I was right! It has problem with 4x memory divider to run the memory more then 1750MHz…With divider 3x no problem. So a little afraid off the divider problem I went back to the max. frequency…and after some button pushes on the mobo I get a frequency of 5761MHz 1.64V, VTT 1.366V, PLL 1,55V.

validation link: http://valid.canardpc.com/show_oc.php?id=1001302

Then I played a little with SPI 1M, SPI 32M and PiFast. Here are the results:

SPI 1M: 7.656s – CPU: 5536MHz, MEM: 664MHz CAS6-7-6-21 1T

SPI 32M: 7m 39s 062ms – CPU: 5511MHz, MEM: 661MHz CAS5-7-6-21 1T

Hexus PiFast: 16.86s – CPU:5561MHz, MEM: 667MHz CAS5-7-6-21 1T

And at the end I run 3D Mark 2003 with MSI N260GTX Lightning clocked at 792/1584/1050MHz(Core/Shader/Memory) with the result:

68981 points – CPU: 5461MHz, MEM: 655MHz CAS6-7-6-21 1T

Thats all for now from single stage cooling… with the teammate we plan to run it on LN2 in a short time… so stay tunned