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i have 1066 ram but it shows 533 in cpu-z (noob question)

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October 22, 2008 11:38:32 PM

like the title i have 1066 ram from ocz, i had to update the bios because it would only support 800 but now it gives me the option for 1066. i picked that and it shows 4gb which i have but it says 533 mhz in cpu-z and then it shows pc2-6400 on the memory slot 2 and 4....so whats going on
October 22, 2008 11:49:45 PM

It really is running at 1066Mhz..... 533x2=1066

CPU-Z shows the ram at half its actual speed, due to something with the 2 cycles/clock or something....

In other words your ram is running at the rated speed of 1066Mhz
a b } Memory
a b à CPUs
October 22, 2008 11:51:19 PM

533 MHz x 2 = 1066Mhz DDR (double data rate). Jedec standards do not rate DDR2 higher than PC2 6400. The Mfg. rates it's RAM as PC28500 which must be set up manually in BIOS to run at those advertised speeds.
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October 23, 2008 2:25:13 AM

i manually put the frequency to 1066 in bios so that means im at pc28500 then right?
a b } Memory
a b à CPUs
October 23, 2008 3:54:18 AM

shortshift23 said:
i manually put the frequency to 1066 in bios so that means im at pc28500 then right?


Yes, that is what CPUZ is reading, 1066MHz or 8.5 GB/sec. data transfer rate.
March 23, 2009 7:19:16 PM

CPU-z only registers one side of the dual data rate hence ddr, doubling that number gives actual dual data rate, mine is the same way on all my systems, your ok!!
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