Next Question! Running RAM at 1:1? How Important?

Gone2mars

Gone2mars

Gone2mars

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Joined
17 Dec 2008
Posts
103
Location
Birmingham, Uk
Hey guys,

I know your sick of me, but while my .NET projects compile i have loads of time to read stuff and think up new questions for you all!

I'm planning to overclock my e8400 + P5Q-E to 4.0ghz.

This means that i will need a FSB of 445 (x 9)

I run DDR2 1066 Memory and my BIOS will let me run it at the following speeds:

667/800/835/887/1002/1066/1111

Assuming i actually achieve the 445 FSB (4000/9) would it be better to underclock my memory to run at 887mhz?

i.e.
FSB: 4000 / 9 = 444.4 FSB

DRAM:
1066 / 2 = 533mhz
OR
887 / 2 = 443.5 (Near 1:1)


Surely having the RAM set to as fast as it will run would be more benificial that running it in a 1:1 relationship with the FSB frequency?
 
Lovely ... so there is more of a benefit of keeping my frequency at 1066Mhz and running at a dodgy ratio rather than running it underclocked to keep it at 1:1 with the FSB.

Jesus those were some fast replies - thanks all :)
 
NoobieOCer said:
although lowering your multiplier and upping the fsb to achive the same speed will be better, higher fsb better performance :D
Click to expand...

Lol - just read this again. If i up the FSB to match the Ram Freq then i'll be running at 4.8 ghz on air!

I think i'll just keep my target at 4ghz because i'm not planning on running Nasa anytime soon :p
 
Ah .. sorry, i miss read it, missed the bit about dropping my multiplier.

Not sure i can get it up to 4ghz yet but it might be something to think about ...
 
Thanks for that Wayne ... IIRC the system bus is the FSB x 4. Due to the System bus being 'Quad pumped' right?

So what your saying is, that my RAM of 1066 still won't be fast enough for an overclock of 4.0ghz? i.e.

1066mhz is still slower than 1780mhz i'm trying to achieve in my overclock?

Will this matter and/or make a difference?

I've also heard that LOWERING my multiplier and making my FSB faster is better than what your suggesting? Which is better for my 1066 RAM?
 
Ahh i'm on the bus, Thanks for that, a good explanation is always welcome :)

Just so i'm clear tho, if i do your earlier calculation on my existing stock speeds (9x333):

FSB= 333MHz
System Bus= 1332MHz

My top spec 1066mhz memory still isn't fast enough for a 1:1? How is that possible? :eek:
 
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