whats up with six layer?

[unilady6767]

I have a amd2200+ processor and Someone just told me to buy the 4000 six layer 500Mhz memory to run best with my cpu but it was my understanding that anything over 333 was not used can anyone tell me if im being dupped

[John Prophet]

old article on pc-133 using 6 layer.

http://www.skwholesale.com/letters/102000.shtm

of course "layers" refer to the printed circuit board (PCB) layers.

Most motherboards use 4 layers, I guess RAM is the same way.

The layers have their own circuit traces etc within them like mayonaise between the layers of a sandwhich.

Evidently the 6 layered RAM has a seperate ground and voltage plane which the 4 layer doesnt.

At least that was the argument from that old article...I am only guessing it is a similar argument now.

Quote "This occurs because four layer boards do not have separate ground and voltage planes, which minimizes noise at higher frequencies."

There might also be heat issues involved as one would think that 6 layer might spread the heat out a little more thus acting as its own heatsink to a degree.

or from an article from techimo http://www.techimo.com/articles/i67.html

Quote----> "The printed circuit board is built via a six layer process to minimize circuit cross talk and noise interference."

JP

[John Prophet]

or a quote from Corsair

Corsair memory is specifically designed for rock-solid performance in the most demanding of applications. Data lines are carefully engineered for noise immunity; clock lines are optimized for minimum skew. All modules use six-layer, impedance-controlled printed circuit boards, with 30 micro-inches of selectively plated gold to ensure a proper interface with the DIMM socket.


So I guess 6 layer is just looked upon as superior. Although I do know that most motherboards (except Gigabyte and Intel usually) use 4 layer boards....but possibly the nature of memory makes it need the 6 layers a bit more.

JP

[RedFury]

My Asus video Card is a 6 layer board. A 6 layer board gives you more flexibility in the layout of the circuits, and the shorter you can draw the line between components, the better.

[John Prophet]

true dat

Sorta like Bruce Lee's one inch punch, lol.

Especially at higher frequencies the traces and paths need to be as short as possible.

JP