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800mhz ram for Macbook pro 2.4ghz?

benjamin77 said:
Howdy folks, just a query - is it worth buying (and is it supported?) 800mhz DDR2 PC2-6400 ram for my new Macbook pro 2.4ghz?

http://www.crucial.com/uk/store/partspecs.aspx?imodule=CT2KIT25664AA80E

I'm getting some financial help from work so want to buy the best ram possible

apologies if I'm being idiotic - I'm not too tech

cheers!
Ben
Click to expand...

I think form reading other posts, the memory controller is 667Mhz on the board, so you can buy 800Mhz RAM but it would only run at 667Mhz and wouldn't show any benefit.
 
koops said:
I think form reading other posts, the memory controller is 667Mhz on the board, so you can buy 800Mhz RAM but it would only run at 667Mhz and wouldn't show any benefit.
Click to expand...

thanks! I thought because the santa rosa bus speed is 800mhz is would support the ram...
 
It will use the full 800Mhz speed, But i wouldnt bother it uses alot of power would stick with 667Mhz ram for battery life the difrence is small anyway.
 
^How would it use the 800mhz....the memory controller only supports 667mhz ram sticks...
 
benjamin77 said:
Howdy folks, just a query - is it worth buying (and is it supported?) 800mhz DDR2 PC2-6400 ram for my new Macbook pro 2.4ghz?

http://www.crucial.com/uk/store/partspecs.aspx?imodule=CT2KIT25664AA80E

I'm getting some financial help from work so want to buy the best ram possible

apologies if I'm being idiotic - I'm not too tech

cheers!
Ben
Click to expand...

I think it's not supported. Weird, I'm a Ben who will also soon be an expat living in Amsterdam, and will most likely be showing up with the same machine haha.
 
Anyone know what's the point of an 800mhz frontside bus couples with a 666mhz memory controller?

it doesnt make any sense... where is that 800mhz relevant to???
 
If your work is paying for it, buy the 800Mhz RAM. Your current MBP will only run it at 667Mhz, but in a future revision 800Mhz RAM may be supported. You could potentially use it at full speed in your next computer(MBP, MB, iMac, etc.). If it's on your dime, just get the 667Mhz RAM.
 
Does anyone know if the new firmware would support 800Mhz memory or not. I feel it's probably just a software lock. I was told some dell SR laptops supports PC2-6400 right?
 
krystox said:
Does anyone know if the new firmware would support 800Mhz memory or not. I feel it's probably just a software lock. I was told some dell SR laptops supports PC2-6400 right?
Click to expand...

Its not a software lock imposed by Apple or otherwise. The memory controller in the current revision SR MacBook Pros does not support PC2-6400 RAM at its full speed...only 667MHz. The Santa Rosa platform doesn't include a memory controller that supports 800MHz RAM at its full speeds, so while you can definitely use it...you're not going to get any benefit from it.

It comes down to the memory controller used on the specific computer. I have no idea if some Dell Santa Rosa-based laptop has a different component than the MBP, so I'm not going to make any claims about that...but the SR MBPs don't support 800MHz RAM right now.
 
Zel said:
Anyone know what's the point of an 800mhz frontside bus couples with a 666mhz memory controller?

it doesnt make any sense... where is that 800mhz relevant to???
Click to expand...

There are 2 things:

1. It's a dual channel memory controller. Hence 667MHz * 2.
2. The CPU talks to a lot of other components. Hence, the overall throughput grows.

Jochen
 
Zel said:
Anyone know what's the point of an 800mhz frontside bus couples with a 666mhz memory controller?

it doesnt make any sense... where is that 800mhz relevant to???
Click to expand...

Sorry to nitpick but it's 667Mhz, and not 666Mhz. The Santa Rosa spec allows for true 64-bit computing, previous chipsets didn't. I guess the 667MHz bottle neck is an example of staggered tech release...? (By Intel, not Apple.)
 
denbysweeting said:
Sorry to nitpick but it's 667Mhz, and not 666Mhz. The Santa Rosa spec allows for true 64-bit computing, previous chipsets didn't. I guess the 667MHz bottle neck is an example of staggered tech release...? (By Intel, not Apple.)
Click to expand...

Holy necro-bump from 6 years ago!
 
denbysweeting said:
Sorry to nitpick but it's 667Mhz, and not 666Mhz. The Santa Rosa spec allows for true 64-bit computing, previous chipsets didn't. I guess the 667MHz bottle neck is an example of staggered tech release...? (By Intel, not Apple.)
Click to expand...

Sorry, my mistake. That was Core to Core 2... I'll go away now,
 
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