RAM Overclocking

[robucf4]

I consider myself fairly new to the whole DIY thing and OC'ing. These forums have been a great source for information but I have a question of RAM overclocking. I read that 1:1 is the holy grail of OC'ing. So for example, on an E6420 3.2 (FSB 400) with a ram multiplier of 2x = ram running at 800, that would be considered running 1:1?

 

[evongugg]

The E6420 has a FSB of 266 MHZ.

http://processorfinder.intel.com/details.aspx?sSpec=SLA4T

so the memory would be DDR2 533 minimum running 1:1.

 

[orangegator]

The E6420 has a FSB of 266 MHZ.

http://processorfinder.intel.com/details.aspx?sSpec=SLA4T

so the memory would be DDR2 533 minimum running 1:1.

I think he was referring to if he overclocked a E6420 to 3.2Ghz.
The answer is yes. A RAM multiplier of 2x is considered running at a 1:1 ratio. It doesn't matter on the type of RAM. For example, you could have DDR2 800 RAM, and run at 333FSB and 2x multiplier. Your RAM would run a 667MHz, but this is still running at 1:1.

 

[robucf4]

The E6420 has a FSB of 266 MHZ.

http://processorfinder.intel.com/details.aspx?sSpec=SLA4T

so the memory would be DDR2 533 minimum running 1:1.

I think he was referring to if he overclocked a E6420 to 3.2Ghz.
The answer is yes. A RAM multiplier of 2x is considered running at a 1:1 ratio. It doesn't matter on the type of RAM. For example, you could have DDR2 800 RAM, and run at 333FSB and 2x multiplier. Your RAM would run a 667MHz, but this is still running at 1:1.

Correct, that is what I meant. Ok now that I know how that works. I read a post in this forum where someone set the multiplier to 2.5 so his ram is running at 1000Mhz, what advantage, if any, does that have? He is running his E6400 @ 3.2 so the FSB is 400, the ram is overclocked.

 

[orangegator]

From what I understand, running RAM at somewhat slower speed at 1:1 will perform better than RAM running somewhat faster at a non 1:1 settings. I don't know at what speed the gains from faster RAM outweigh the losses from non 1:1. I'm sure if you search you'll find info on this.
So that's why he's running at 1000MHz. He probably has expensive RAM rated for that speed. And he either gets or thinks he gets better performance. Not sure if 200MHz faster RAM outweighs the non 1:1 loss. Probably does.