I recently bought some OCZ EB PC4000 Platinum (DDR500) and installed the new RAM into my system. I riskily tried to run it at its rated speed (3-3-2-8 250 MHz FSB 1:1) and the computer would not boot up (black screen). I lowered the frequency to 200 and it POSTed. Upon checking the SPD settings in Windows with both Sandra and CPU-Z 1.30 I found that the memory was surprisingly running at 2.5-3-3-6, the exact same timings I was running my old memory at! I set my memory timings in the BIOS at 3-3-2-8 but it would disobeyingly run at 2.5-3-3-6. I tried setting it to SPD (default 3-3-2-8) but still ran at 2.5-3-3-6. Then I tried changing the settings to 3-3-3-8 but it still ran at 2.5-3-3-6. Finally, I re-flashed the BIOS, but it did not solve the problem. With those stubborn timings, I won't be able to overclock even a mere 210 MHz. If anyone has encountered this problem, suggestions will be appreciated.