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Relationship Between RAM speed and Front Side Bus

  • Bus
  • RAM
  • Overclocking
Last response: in Overclocking
November 19, 2007 8:51:05 PM

I was told (or at least I got the impression) that your ram needs to be running at the same speed as your front side bus, or you will run into a bottle neck. I'm looking into a Q6600, and intend to up the FSB to around 400 mhz (which, I believe, = 1600mhz bus and 3.2ghz clock?). Anyhow, does the ram need to be running at 1600mhz to avoid a bottle neck, or is it 800, or 400, or what? Given that it is double data rate, I'm assuming it needs to run at 800mhz for this bus speed but, again, I'm not sure.

More about : relationship ram speed front side bus

November 19, 2007 8:53:03 PM

1:1 = 400 MHz. DDR makes it 800 MHz.
November 19, 2007 9:14:43 PM

So the simple version is the (DDR2) RAM needs to be running at twice the speed of the bus?
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November 19, 2007 9:15:23 PM

FSB = quad pumped so 1600mhz = 400mhz
RAM = Double Data Rate so 800mhz = 400mhz
and if you cant see 1:1 ratio i cant help ya
November 19, 2007 9:22:13 PM

I see it, no need to be touchy.

Thanks for the help.
November 19, 2007 9:24:00 PM

Srry if it sounded like it mate, just throw in a joke
November 20, 2007 12:09:24 PM

Noticed you said 3.2Ghz in your first post, just wanted to make sure you understood you would actually get 3.6Ghz with a cpu FSB OC of 400Mhz at 1:1 with your memory.

CPU @ 400FSB x9 = 3.6Ghz, 9 being the CPU's multiplier. To achieve 3.2Ghz, you would need your CPU @ 355FSB.

November 20, 2007 1:14:06 PM

or use an 8x and 400mhz to get your 800mhz for the RAM