Memory Confusion.. Optimal FSB/Memspeed pair?

puntloos

Junior Member
Jan 16, 2007
10
0
0
Gents (m/f),

I've been eyeballing the Gigabyte GA-P35-DS3R Mainboard for a little while now. (The mainboard brand/type is not that important, just the fact that it supports stock 1333Mhz FSB CPU's). Goal is a 'kickass home server' so most specifically throughput (raid5 with ich9r) is the goal.

My questions:

- Are there any CPUs (other than Xeons) that can do 1333mhz safely (I assume we are entering overclock country), and is this worth it?
- Assuming a 1333Mhz clocked CPU, isn't it true that only 1333Mhz memory will work at its peak efficiency?

And since I dont think any stock-speed 1333Mhz memory exists:
- Is 1066Mhz DDR2 any improvement over 667Mhz DDR2? 667 would be 1:2 which sounds much more efficient than some weird 1:1.25 clock?
- Would perhaps getting a 1066FSB CPU yield a better system paired with 1066 RAM?

And finally:
Will all these 'differences' even matter? Can anyone give me a ballpark overall speed-difference comparing say DDR2-667 ram with DDR2-1066 with (hypothetical) DDR2-1333 when paired with a 1333Mhz CPU?

I'll add a poll for everybody to list what they consider is the best pair! (assuming for a moment money is not a factor, and all pieces of RAM can run at exactly the same CAS/RAS values etc)
 

MaxGeek

Junior Member
Jun 16, 2007
13
0
0
I would go with high quality 800mhz ram that can overclock well like Crucial Ballistix or Corsair. 1066 ram isn't a bad choice either if there is a good deal, like Corsair 1066 was cheaper then 800 for a while after rebate.

Maybe not the best example but from this anandtech article you can see the performance difference in superPi and Far Cry with different memory speeds (800, 1066, 1333 (DDR3).
http://www.anandtech.com/cpuch...howdoc.aspx?i=2991&p=4
(Note: Article was meant to compare the P965 vs P35 chipset but it also shows results at different speeds)

It really doesn't make a huge difference.




 
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