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Just Wondering...

post #1 of 3
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On newegg any any site that gives processor details some will have different FSB ratings. For instance a QX6700 has 1066MHz FSB. Then in CPU-Z the FSB will be low. I understand that somewhat because it is being multiplied. Then for motherboards it will show the supported FSB MHz like 1333/1066MHz. So what is the difference between these if any. And does a CPU that has 1066MHz FSB is all those MHz being utilized?
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CASTLE GRAYSKULL
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post #2 of 3
FSB is basically quad pumped. Therefore when you see 1066 or 1333 fsb think 266x4Mhz or 333x4Mhz. This is what is show in CPU-Z is the 'bus speed' with the quad pumped 'rated fsb' below.

1333fsb is for the new C2D's which use a 333Mhz quad pumped FSB (as opposed to the 266Mhz currently used) - the E6550, E6750 and E6850 read here:
http://www.dailytech.com/article.aspx?newsid=5414
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post #3 of 3
For a more detailed explanation:

http://download.intel.com/design/pro...s/31559201.pdf

Page 26 has more information on BCLK and FSB.
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