Question 1

can this be used in a desktop setup...just curious...?

Accepted Answer

I bought the Momentus in August 2013 to replace the failing drive in my 10-year-old desktop Mac. Apart from having to reformat for Mac OS, no other modifications were needed.

Last fall, I moved the Momentus to an external housing because I wanted to experiment with a solid state drive. However, the Momentus has continued to serve reliably as my music and backup drive. I've never had a problem with it in either configuration.

If you choose to try this drive in your desktop, just remember to order an appropriate drive bracket, if needed.

Question 2

My original hard drive is a Momentus   ST9500420AS , will this replacement work seeing that the last 5 digts are 423AS vs 420AS?

Accepted Answer

Keith,
2.5" drive bays are pretty much standard on laptops theses days. As long as you have a sata connection you are good to go. Remember to keep the screws and any plastic frame bits from your old hard drive.
Apologies for the late answer. I am sure your shopping is long over. But if not, I hope this helps,
G

Question 3

my hard drive is  ST9500420AS. will this one replace mine?

Accepted Answer

I believe the 423AS is newer technology, having 4K sectors. Otherwise I believe the drives are interchangeable

Question 4

I have Seagate Momentus 7200.4 ST9320423ASG  320GB internal drive  in a Mac Book Pro 15" and want to upgrade to 500 GB.

Will Seagate Momentus 7200.4 ST9500423AS work for me?

Accepted Answer

It should, but I really can't answer definitively as I haven't tried it in a MacBook Pro. I suggest checking the compatibility matrix on the Seagate site just to be sure. Good luck!

Brand	Seagate
Series	Momentus 7200.4
Model	ST9500423AS
Packaging	Bare Drive

Interface	SATA 3.0Gb/s
Capacity	500GB
Cache	16MB
RPM	7200 RPM

Form Factor	2.5"
Height (maximum)	9.5mm
Width (maximum)	69.85mm
Length (maximum)	100.35mm

Seagate Momentus 7200.4 ST9500423AS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 2.5" Internal Notebook Hard Drive Bare Drive

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Item#: N82E16822148914