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OVERCLOCKING G-SKILL RIPJAWS - Page 2

post #11 of 17
Quote:
Originally Posted by pioneerisloud View Post

Wrong. 800Mhz in single channel is still DDR3-1600. Double channel just means that you've got 2 sticks installed, so you can write to both sticks at the same time (theoretically twice as fast as one stick).
800Mhz = DDR 1600. As its DOUBLE data rate. They're not 1600Mhz sticks, they're only 800MHz. The bandwidth is 1600 though.
Aww, you beat me to it, but...

Wrong! I'm kidding, but really, can we not initially start our posts with just "wrong"? It sounds condescending and rude.

Anyway, I think you are wrong about the last part (the rest is right though). I thought that the bandwidth, in the case of 800MHz DDR (1600MHz effective) RAM, is actually 12.8 GB/s or Gb/s (not sure which), hence the PC12800 number? 1600 MHz is the effective MHz, and the literal MT/s.
post #12 of 17
Quote:
Originally Posted by Princess Garnet View Post

Quote:
Originally Posted by pioneerisloud View Post

Wrong. 800Mhz in single channel is still DDR3-1600. Double channel just means that you've got 2 sticks installed, so you can write to both sticks at the same time (theoretically twice as fast as one stick).
800Mhz = DDR 1600. As its DOUBLE data rate. They're not 1600Mhz sticks, they're only 800MHz. The bandwidth is 1600 though.
Aww, you beat me to it, but...

Wrong! I'm kidding, but really, can we not initially start our posts with just "wrong"? It sounds condescending and rude.

Anyway, I think you are wrong about the last part (the rest is right though). I thought that the bandwidth, in the case of 800MHz DDR (1600MHz effective) RAM, is actually 12.8 GB/s or Gb/s (not sure which), hence the PC12800 number? 1600 MHz is the effective MHz, and the literal MT/s.

doh.gif You are correct. biggrin.gif

Sorry, this is what I get for OCN'ing after a short nap after being up for 2 days. sozo.gif
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post #13 of 17
Haha, it's okay. I think you were going for what I clarified but just termed it wrong. Bandwidth and MHz are two different things. It is effectively 1600MHz, but the bandwidth is much higher. Actually, doesn't the bandwidth depend on if it's in single channel or dual channel? I'm not sure if that number (the 12800, in this case) refers to single channel or dual channel, since I think dual channel effectively doubles the bus width and bandwidth.
post #14 of 17
Quote:
Originally Posted by Princess Garnet View Post

Haha, it's okay. I think you were going for what I clarified but just termed it wrong. Bandwidth and MHz are two different things. It is effectively 1600MHz, but the bandwidth is much higher. Actually, doesn't the bandwidth depend on if it's in single channel or dual channel? I'm not sure if that number (the 12800, in this case) refers to single channel or dual channel, since I think dual channel effectively doubles the bus width and bandwidth.

I believe the bandwidth is rated off dual channel, but I could be mistaken. It's going to actually vary from machine to machine based off your memory controller speed anyway.
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post #15 of 17
they are all correct. if your cpuz shows 800mhz you double that and get the rated 1600 speed. the dual channel memory works on the rising and falling clock cycles so it gets alot faster then the old basic ddr memory speeds. does anyone remembered the more expensive and failed rambus ram? guess who manufactured it...if you get it right you get a digital cookie from me!
 
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post #16 of 17
Quote:
Originally Posted by Dt_Freak1 View Post

the dual channel memory works on the rising and falling clock cycles so it gets alot faster then the old basic ddr memory speeds.
It has nothing to do with dual channel, as I already explained. It's because it's DDR (that is, after all, what DDR means/stands for). DDR(1) in single channel mode will work this way.
post #17 of 17
doh.gif "Official Facepalm Moment"

When I suddenly realize just how obvious the truth was.

Can't believe I let myself mix up the effects of DDR and dual channel...

Double Data Rate operates on the rise, and the fall of the clock, effectively doubling the amount of cycles per second (Mhz).
Like as with GPU having an "effective memory clock" greater than the actual set clock through DDR.

Dual channel could be compared to drive stripping (RAID 0), which roughly doubles potential bandwidth.

So-- Am I not too stupid after all? lol smile.gif
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