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psoin
Nov 8, 2005, 08:48 PM
Hi,
I just received and installed a 1GB memory stick from OWC and the system profiler shows this:
Size: 1 GB
Type: DDR2 SDRAM
Speed: PC2-4200U-444
Status: OK

Does the 444 stand for the mhz?
Shouldn't the memory be 533 mhz?
How do I test to make sure it is the correct speed?

Thank you for your help.
P.S.

BTW It's my first MAC and its great!

DaftUnion
Nov 8, 2005, 09:05 PM
Simple answer, no. PC 3200 memory is actually 400mhz...PC 4200 memory is 533mhz...about 99% sure on that.

DaftUnion
Nov 8, 2005, 09:07 PM
Actually, somebody else should help out on the forum...4200 isn't mhz...but you might be right on that second part saying the number after 4200...not sure on this one:confused:

carlos700
Nov 8, 2005, 09:48 PM
When memory is labeled PC2-8000, they are talking about the bandwidth 8.0GB/s. When memory is labeled DDR2-1000 they are talking about the frequency: 1GHz.

1GHz DDR2 memory has a maximum bandwidth of 8GB/s
900MHz DDR2 memory has a max of 7.2GB/s
800MHz DDR2 memory has a max of 6.4GB/s
667MHz DDR2 memory has a max of 5.3GB/s
533MHz DDR2 memory has a max of 4.2GB/s

I believe 1GHz is the fastest available.

nospleen
Nov 8, 2005, 10:04 PM
I predict that CanadaRam will post a reply in 3, 2, 1,...:D

Xephian
Nov 8, 2005, 10:12 PM
Hi,
I just received and installed a 1GB memory stick from OWC and the system profiler shows this:
Size: 1 GB
Type: DDR2 SDRAM
Speed: PC2-4200U-444
Status: OK

Does the 444 stand for the mhz?
Shouldn't the memory be 533 mhz?
How do I test to make sure it is the correct speed?

Thank you for your help.
P.S.

BTW It's my first MAC and its great!
The 444 after PC2-4200U is the latency timing of the RAM. The tighter the timing for the RAM the faster the RAM will be.