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Htt? Fsb? Ht?

post #1 of 4
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I have managed to overclock my processor but I am still not grasping a couple of concepts:

I have my HTT (which I thought was the FSB for AMD) set at 245 with 10x multiplier, this is pushing my DDR400 RAM, which I have set on 166, to 203.

I know that my RAM is capable of running at 250mhz.

I don't understand where the HT comes into play; mine is set on 800mhz, but I have no idea how this comes into the equation:

My goal is to have my CPU running at around 2.5 ghz with the RAM running at 240-250ish, I can't find the combination of settings that gives this result. I have ready everywhere, I need someone to explain what NB-SB link and CPU-NB speed means to the overall process.

Thanks
post #2 of 4
HT is part of the control for the memory frequency; AMD processors (64) are designed to use PC3200 which operates at a FSB of 200. The HT is designed to operate at a frequency of 1000 - so the FSB times the HT multiplier should equal 1000 (or so)--5 x 200 = 1000. In your case, the HT multiplier should be set at 4x so that
4 x 245 = 980. For the RAM to run at 245, you need to set the RAM divider to a ratio of 1:1 or DDR400. You're correct about the HTT - it is pretty much the same as the FSB. With the RAM ratio at 1:1, the RAM will run at the same frequency as the HTT (which will be 245 when you make the change). Don't forget to give the RAM a little more voltage or loosen the timings until you get everything stable. I am giving you this advice with the understandings that A. I am NOT an expert and B. I am giving you the perspective of an Abit motherboard owner and operator. I hope this little bit helps.
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Py Tin
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post #3 of 4
Quote:
Originally Posted by Pythagoras
HT is part of the control for the memory frequency; AMD processors (64) are designed to use PC3200 which operates at a FSB of 200. The HT is designed to operate at a frequency of 1000 - so the FSB times the HT multiplier should equal 1000 (or so)--5 x 200 = 1000. In your case, the HT multiplier should be set at 4x so that
4 x 245 = 980. For the RAM to run at 245, you need to set the RAM divider to a ratio of 1:1 or DDR400. You're correct about the HTT - it is pretty much the same as the FSB. With the RAM ratio at 1:1, the RAM will run at the same frequency as the HTT (which will be 245 when you make the change). Don't forget to give the RAM a little more voltage or loosen the timings until you get everything stable. I am giving you this advice with the understandings that A. I am NOT an expert and B. I am giving you the perspective of an Abit motherboard owner and operator. I hope this little bit helps.
good avice there.

if you know your Ram will work at 250for sure, AFAIK there's no need to put it on a divider if you only want to reach 240-250.

people only use dividers if their memory can't reach the speeds that they're willing to push their CPU. which isn't the case for you if i read that correctly.
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post #4 of 4
Thanks for explaining how the Hyper transport works, i was just about to post this question on another thread.!!
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