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05.15.2008 at 12:49PM PDT, ID: 23406502
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What is the most efficient 4 DIMM or 8 DIMM

Tags: Dell, Workstation, Presision 7400
I am configuring a Dell Precision 7400 to purchase. I plan to load Adobe Creative Suite 3 Production Premium and use it for video editing. I have configured two each quad core XEON 3.00 GHZ processors, the X5450. I plan to use 32 bit XP as the OS so 4 GB of memory is the max it will suport. I can get the memory in several different configurations, either 2, 4, or 8 DIMMS and I have the option of either 667 MHZ or 800 MHZ memory, since the processor is 1,333 mhz processor I don't know if it does me any good to go the the 800 MHz memory, if I specify the X5482 processor, a 1600 MHz processor, I am forced to select 800 MHz memory sticks that makes me question whether I should use the 667 or the 800 MHz memory.

So that is two questions:
1. 4 DIMMs or 8 DIMMs
2.667 MHZ or 800 MHZ memory.

Any and all comments appreciated. Thanks
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Question Stats
Zone: Computer Hardware
Question Asked By: grmflash
Solution Provided By: garycase
Participating Experts: 2
Solution Grade: A
Views: 8
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05.15.2008 at 01:34PM PDT, ID: 21577728

Rank: Master

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05.15.2008 at 02:38PM PDT, ID: 21578204

Rank: Guru

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05.15.2008 at 03:04PM PDT, ID: 21578344

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05.15.2008 at 06:27PM PDT, ID: 21579188

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05.15.2008 at 01:34PM PDT, ID: 21577728

Rank: Master

I recommend 2 x 2GB (2 modules) of DDR2 800 memory. The fewer modules, the more efficient memory addressing. It's a very small, but real difference. Even if not necessary, go with the 800MHz RAM for some additional overhead. Prices should be the same or very close.
 
05.15.2008 at 02:38PM PDT, ID: 21578204

Rank: Guru

willcomp's suggestion is correct for unbuffered desktop boards;  but in this case he's wrong.

The Precision 7400 uses fully buffered DIMMs, so the bus loading of multiple modules isn't a factor here;  and in addition it supports quad channel memory bus operation ... so you should use matched sets of 4 modules to get the best performance.   So you want either 4 or 8 modules.   I'd go with 4 800MHz modules ... it should run at a 5:6 FSB:DRAM ratio and give you a slight bandwidth boost over the 667MHz modules (memory does not have to run synchronously with the FSB).   I'd use 4 modules just to leave the additional slots available ... just in case you later decide to go with an x64 OS and want to add additional memory.

Accepted Solution
 
05.15.2008 at 03:04PM PDT, ID: 21578344

Rank: Master

I stand corrected. Prefer your ribs very well done do you? :>)
 
05.15.2008 at 06:27PM PDT, ID: 21579188

Rank: Guru

:>)    Well, at least you were right about it being a good idea to get the 800MHz memory :-)

... and I'm sure if you weren't busy you'd have checked the specs and noticed that this system used buffered memory and supported quad channel access !!   [The luxury of being retired is I can take the time to check those kind of details :-) ]

grmflash => Forgive the off-topic banter :-)    I think your question's been answered, but if you have any further questions please ask.
 
 
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