Why run with two when you have only one core?
The program runs workers to use all threads + cores. N270/N280 may not be a dual core CPU, but it can handle two threads at once. When you run only one worker, you make only one of the threads run, the other one empty. I won't be able to tell you this technically, but for example, when I enable Multicore Rendering in Left 4 Dead, I get an extra 10 fps.
i managed to to get RMclock to do the trick 1880mhz for me is stable but going to 2ghz 1 threat failed in prime95. Cpuz tells its run at 1.275 v. My ratio rated 2:5 when mem hit 400mhz or above my windows dont like launching new apps, half jsut freeze. any idea?
Your FSB:DRAM ratio is 2:5? Model, BIOS and OS please. You might have one of those N10s that have a 2:5 ratio. The normal is 1:2. The 2:5 ratio does not allow you to overclock much, probably due to RAM failure.
Also, do you use the latest CPU-Z? The old versions mixed the voltage measurements with another CPU. The highest CVV N270 can handle is 1.1V.
Asus N10Jc @ 2.06 Ghz - XP / 7 Dual - 2GB 667Mhz RAM - WD Scorpio Blue 250Gb - FSB:DRAM 1:2 - CVV 1.1V