How come 500gig WD blue has faster specs than 640gig WD black ???

[Mfusick]

WDblue 500gig

http://www.newegg.com/Product/Product.aspx?Item=N82E16822136760


vs


WD 640gig black

http://www.newegg.com/Product/Product.aspx?Item=N82E16822136805


How I see it is that the black is larger (640gig vs 500gig) larger 64mb cache, and black version is more performance and enthusiast oriented.

BUT....

Average Seek Time: Black
11ms
vs

Average Seek Time: BLUE
8.9ms


hmmmm...

What would you do?

Price is not much more for the black

 

[mosox]

The first one has only one platter with higher density. The Samsung Spinpoint F3 HD502HJ 500GB is better though.

 

[Mfusick]

so single platter is better than a dual platter?

 

[Mfusick]

whats better performance?

640gig Black WD single drive

vs

2 x 500 gig Seagate or WDblue in RAID 0

vs

1TB single drive (or 1.5TB single drive)

vs

2 x 640gig WD black in RAID 0

????