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Dual Ch = Sorta half the memory?

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marc999

Member
Joined
Jan 16, 2003
Location
Calgary, Alberta CANADA
I got the impression, somewhere, that if you are running dual channel, you only really have the capacity of one of the sticks. So if you're running 2 x 512 MB sticks, you only have 512 MB of usable RAM (even though Windows shows 1000 MB of RAM under System). Maybe this would be because one stick is functioning as upload and one as download, as I've seen some MOBO manufactures label their DIMM slots for dual channel boards. Anyway, can someone tell me if this is how it works or not?

Thanks.
 

DanIdentity

Member
Joined
May 30, 2004
Dual channel simply means the RAM can move data on the rising and falling edges of a clock cycle. Effectively twice the bandwidth.

You still would have 1GB of usable RAM in your example.
 

Tebore

Member
Joined
Aug 15, 2001
Location
Toronto,Canada(I can see you....)
DanIdentity said:
Dual channel simply means the RAM can move data on the rising and falling edges of a clock cycle. Effectively twice the bandwidth.

You still would have 1GB of usable RAM in your example.

Actually you just discribe how DDR works, not how dual channel works.
 
OP
M

marc999

Member
Joined
Jan 16, 2003
Location
Calgary, Alberta CANADA
Thanks Tebore for straightenning everything out. Like I said, I have no idea where I got that idea, but it looks like I am wrong. But this is one of those instances where it's good to be wrong, becuase that means we don't end up with half our RAM sticks "unusable" in we have a dual channel system!!