My G5 which is a dual 2.3 using PC3200 is VERY picky about how the RAM
is seated. I reseated my sticks something like 26 times before I got
all 8 slots recognized and working simultaneously. Once they all were
recognized, I've never had another problem.
I think it helps if you press the CUDA button before booting after
each time you add or change RAM. I think your 1 GB sticks are probably
good. I'd try with ONLY the pair of 1 GB sticks over & over again
until they're recognized, and then add back the pair of 512MB that
seem to work better.
On Feb 11, 2011, at 11:49 PM, jason wrote:
Hey all. Today got some additional memory for the above system but
the g5 1.8 ghz tower(pci-x) refuses to recognize them. I currently
have two 512 sticks that work fine, but the two new 1 gb sticks don't
show.
The packing slip identifies them as "PC3200 1gb DDR SDRAM 400mhz 184
pin memory", and the the stick labels both read "1 gb PC-3200 UDIMM
1RX4".
I did move the sticks in question around to the different matching
slots, but the computer ignores them.
I moved the two 512 sticks around as well, and they were recognized in
each of the slots.
What gives? I thought I was careful in selecting the right ram.
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