Question about Core 2 Duo FSB

steinooo

steinooo

steinooo

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Hi all,

Which RAM would you need to buy to realise a full bandwidth of 1066Mhz FSB for these Core 2 Duo boards that claim a max FSB of 1066Mhz please?
 
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If you want to run the processor and memory on a 1:1 ratio then you would have to get pc8500 memory. Very expensive though 2gb is £250 vs £190 for the 6400. Also due to slacker timings, may not be all that faster.
 
1:1 isnt pc8500


1:1 Stock 533MHz on an E6600 = 2.4GHz

so all you need is 533mhz ram for 1:1.

when you start overclocking, obviously the better the ram, the higher it will clock etc etc
 
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OK thanks, so if you weren't planning to overclock, to optimise the 1066Mhz FSB, you'd buy two sticks of PC6400 RAM?
 
hyper_piper45 said:
If you are overclocking you definatly want some 6400 ram. I recommend the geil ultra :)
Click to expand...

thanks, but what if i'm not overclocking? whats the optimum speed of ram in that case?
 
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Intels infamous 'fsb' arrangement.

133 = 533 cpus
200 = 800 cpus
266 = 1066 cpus

So the system clock either runs at 133, 200 or 266 and is sampled 4 times and is termed a quad pumped bus. So to be technically correct 133, 200 and 266 are the actual fsb's and that's where the x4 comes from.
 
Try compare results from other 6600 owners in other forums. different ram different results, but obviously the faster and better quality the ram the better the results.
 
This might help, from Explicit's post

e63007il.gif


e64006hm.gif


e66007ne.gif


e67002mc.gif
 
stokefan said:
OK thanks, so if you weren't planning to overclock, to optimise the 1066Mhz FSB, you'd buy two sticks of PC6400 RAM?
Click to expand...
No it would be PC4200 that run at 266MHz or 533MHz DDR. Personally i'd go for the PC5300 as it's more readily available, still cheap and gives you a fair amount of OCing head room should you decide in the future to go down that route. Unless you're planning on altering the multi on the CPU of course.
 
thanks for the charts, but they're for when you overclock aren't they.

I wonder what RAM would be the fastest at stock, with stock CPU speeds to realise a 1066Mhz FSB? Am i taking it that it's PC6400?
 
Reiver said:
No it would be PC4200 that run at 266MHz or 533MHz DDR. Personally i'd go for the PC5300 as it's more readily available, still cheap and gives you a fair amount of OCing head room should you decide in the future to go down that route. Unless you're planning on altering the multi on the CPU of course.
Click to expand...

sorry mate didnt see your post before I post just.

well - would I be wasting my cash buying PC6400 RAM then if i'm gonna keep everything stock? its a 6400 core 2 duo chip i'm on about btw.
 
How often do you upgrade? PC6400 might do for your next CPU if you're upgrading in the next year and save you needing new RAM but no guarantees. With the prices of memory at the moment (over £200 for 2gigs of PC6400) I'd say yes, you would be wasting your money, IMO. PC5300 is much better for your current needs.
 
ok i stil lthink i'm missing somthing here.

Calculating the frequency used to be ((FSB*2)*8). So an FSB of 200MHz would require PC3200

but with the new stuff
1066 x 8 = 8528 ???
 
1066 is the quad pumped FSB, so dividing it by 4 gives the normal FSB of 266.

then going back to your equation, which is correct, gives
266 * 2 * 8 = 4266
 
The $6m Dan said:
1066 is the quad pumped FSB, so dividing it by 4 gives the normal FSB of 266.

then going back to your equation, which is correct, gives
266 * 2 * 8 = 4266
Click to expand...

Thats wrong :confused:

E6400 stock = 266x8 = 2180mhz ish.
E6600 stock = 266x9 = 2396mhz.
E6700 stock = 266x10 = 2660mhz.

Buy PC6400 memory, put the FSB to 400, 1:1, 4-4-4-10, 7x multi 1.25V = 2800mhz which will kick the pants off any AMD, inc them over 3Ghz.

Or you could just use a 800mhz divider at stock to let the chip have its mem B/W.

CR.
 
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