Any difference at all: 8Gig and 4Gig chips

[IceMacMac]

Are there any real-world differences in say... 8 of the 4 GIG chips...versus 4 of the 8 GIG Chips...in MacPros 2009 and later?

Obviously the price per gig is not as good...but I'm talking about performance, known gotchas...that kind of thing.

Just looking for some re-assurance here. Sometimes there are peculiar things that show up with certain pairings, slots, etc.

 

[goMac]

Are there any real-world differences in say... 8 of the 4 GIG chips...versus 4 of the 8 GIG Chips...in MacPros 2009 and later?

Obviously the price per gig is not as good...but I'm talking about performance, known gotchas...that kind of thing.

Just looking for some re-assurance here. Sometimes there are peculiar things that show up with certain pairings, slots, etc.

Usually having more chips will show some speed improvements, so in this case the 8 4 gig chips would be slightly faster.

Makes it harder to upgrade in the future, though.

 

[Umbongo]

Nothing of significance. 8GB DIMMs are almost certainly going to be registered memory rather than unbuffered which is less than 1% slower when you use less than 4 per CPU and 8% or so faster when you have 4 per CPU, but you can get 4GB registered DIMMs too. You won't notice this in real world performance.

 

[IceMacMac]

GoMac, Umbongo

Thanks guys. I think I'm going to get 48 GIGs--6 of the 8. After Effects wants 2-3 Gig of RAM per CPU/Thread, plus lots of overhead...and that's my every-day application.

Any parting thoughts about using 6 of 8 slots...with 8?

 

[MattDSLR]

if you have the cash go with 8 gigs
you will not be sorry