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Front Side Bus difference
Name: xcalibr79 Date: December 30, 2005 at 21:34:43 Pacific OS: Windows XP Home CPU/Ram: AMD 64 3700+/1.5GB DDR RA
Comment:
Hi, the front side bus speed of my processor appears to be 1600mhz while the speed of my motherboard is 200mhz. Is that normal or am I bottlenecking at 200mhz? I searched and didn't find an answer to this question. Thanks.
Name: jam Date: December 30, 2005 at 22:07:20 Pacific
Reply:
Technically, the A64 doesn't has a FSB...it has a Hypertransport bus. Depending on what you have, the HT bus is either 800MHz (DDR1600) or 1000MHz (DDR2000).
The HT bus is the product of the CPU frequency (which is 200MHz by default) & the HT multiplier. There are exceptions, but generally, the S754 A64 has an HT multi of 4x & the S939 A64 has a multi of 5x. That number is then doubled because of DDR.
So..........
S754 = 200MHz x 4 (HT multi) x 2 (DDR) = 1600MHz
S939 = 200MHz x 5 (HT multi) x 2 (DDR) = 2000MHz
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Response Number 2
Name: xcalibr79 Date: December 31, 2005 at 10:35:04 Pacific
Reply:
Thank you very much for your comprehensive answer, it helped a great deal.
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