Which set? (2 x 4GB pc5300 DDR2 FB-DIMM vs 2 x 4GB pc6400 DDR2)

[therealmjay]

Hey,

So at a bit of a crossroad. I'm doing a lot of heavy computing for mostly long periods of time and occasionally sporadically. And i came here to get your opinions on which upgrade to go with either a

2(2 x 4GB pc5300 DDR2 FB-DIMM) or 2(2 x 4GB pc6400 DDR2){also a 4 x 4GB}

which one outweighs the other FB-DIMM or the higher 6400?

also looking at newegg any suggestions on a certain brand?

my setup is the following according to crucialscan

# Maximum Memory Capacity: 16384MB
# Currently Installed Memory: 8GB
# Available Memory Slots: 0
# Total Memory Slots: 4
# Dual Channel Support: Yes
# CPU Manufacturer: GenuineIntel
# CPU Family: Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz CPU
# CPU Speed: 2826 MHz

 

[jsc]

You didn't say what motherboard you have. Many Core2 motherboards cannot use FB memory. It's a server thing, I think.

Look up the part number of the memory that is already in it.

Also check the QVL for the motherboard.

 

[therealmjay]

im pretty sure it cannot use FB memory.

sorry for the delayed response but the motherboard really doesnt have a name its a Dell T3400 motherboard im pretty sure they all use the same motherboard...

part number ill update later but it has 4 2GB DDR PC2-6400

i was thinking of getting either one of the two

http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=C51E7305A5CA7304 ITS NOT EEC
or
http://www.newegg.com/Product/Product.aspx?Item=20-231-302&SortField=0&SummaryType=0&PageSize=10&SelectedRating=-1&VideoOnlyMark=False&IsFeedbackTab=true#scrollFullInfo

and im not sure about the second if its eec

 

[therealmjay]

Memory
MemoryDual Channel DDR2 SDRAM3 system memory

Four DIMM slots support up to 16GB dual-channel DDR2 667 or 800MHz non-ECC and ECC memory

so which one do u recommend?