Originally Posted by qwerty007
with reference to blownfuse, i think yr rams are only running at 266 am i right? correct me if i'm wrong hardball...
that because yr fsb : ram is 1 : 1
means fsb = 133, quad pumped = 533
yet yr rams are 2 x 133 for ddr2, hence 266...
you have ddr2-533 rams but they're running on 266.
looks like all our sonomas are crap man. there's no point having fsbs at 533 yet rams at 400...
somebody has gotta call intel!
or maybe cpuz is wrong... so does anyone with unacer laptops post screenshots to verify?
I think you are partially right.
If it's DDR2, it would in principle be 4x133 = 533MHz, but I don't really own a DDR2 machine, so I don't really know how it would appear on CPU-Z. But one thing I know is that if you have a machine with 200MHz or even 100MHz memory clock, there is no way you can have 533MHz memory bus. Memory Data Rate, as far as we have always seen, always appears in integer multiples of the mem clock, such as 1x, 2x, 4x.
So, for sonoma 533 FSB running DDR2 PC4300, I would expect at CPU utility to detect the BUS/DRAM clock ratio to be 1:1 or 1:2, there really can be no other ratio that would work.
Edit: unlike FSB:CPU clock ratio, the Data Rate on memory modules cannot really be fractional, and is not an adjustable multiplier -- i.e. no scalability. So, memory clock can only be sped up or slowed down by changing the memory clock, which is itself dependent on the system clock.
If the DDR2 RAM is running in 533, it will depend on whether the utility is set up to specifically work with DDR2 chipsets. If it can detect native DDR2 settings, then 133 x4 should be what it detects. But if it is only compatible with DDR-I, then it might actually detect 266 x2.
It seems that there is something wrong with the 915PM chipsets on some of these machines. Unless ACER made some big boo-boo about the BIOS settings, (the lantency settings appear correct), then it would be the fault of either the mobo manufacturer, or Intel itself, who makes these chipsets.