1 gig 800mhz or 2gig 675mhz upgrade?

[foz]

I need some advice! I want to add some more ram to my system but I cant decide if I should: add 1 gig of 800mhz cas4 for $81
http://www.newegg.com/Product/Product.aspx?Item=N82E16820145040
(I currently have the 2gig version of this installed)
Or should I add 2 gigs of 675 cas4 for $89
http://www.newegg.com/Product/Product.aspx?Item=N82E16820145015
(I figure I could OC this with a little extra voltage)

Should I worry about futureproofing and go with the higher mhz.? Would 4 gigs of ram actually show a difference vs. 3 gigs? Also I dont see myself pushing my E4300 much past 3ghz.

My current ram:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820145034

Thank in advance!

 

[StringCheesian]

32 bit operating system, or 64 bit?

 

[foz]

I am running the 32bit Vista. I read some where that the 32bit version of Vista can only use about 3400 MB of ram, is this true?

 

[Mondoman]

It varies depending on your specific hardware, the number of add-in cards, etc. Typical range is 3-3.5GB, but certain cases can be even lower (e.g. using multiple graphics cards).

 

[djgandy]

Should I worry about futureproofing and go with the higher mhz.? Would 4 gigs of ram actually show a difference vs. 3 gigs? Also I dont see myself pushing my E4300 much past 3ghz.

What is this futureproofing you are talking about? Memory is an easily upgradable component. Why buy more if you don't need it now? You can buy it when you do need it, if you do.