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Politics : Formerly About Advanced Micro Devices
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To: Bill Jackson who wrote (77490)10/27/1999 10:43:00 PM
From: Elmer  Read Replies (1) of 1573927
 
Re: "Single PC100 CL2 128MB DIMM, SoundBlaster Live (Value) Audio, Linksys HPN100 Home Ethernet card, Toshiba 6X DVD SD-M1212, Seems to show an 100 MHZ memory bus? in that std configuration?"

The memory bus is 100MHz but the processor bus is 200MHz data rate. The processor bus (actually a port) transmits data off both the rising and the falling edge of a 100MHz clock. This is called "double pumped" and it's not new. AGP has had double pumped data for a few years now and DDR memory as well as RDRAM is also double pumped. This accounts for the confusion. RDRAM is called by some 400MHz while the data rate is actually 800MHz. AGP 2X has a 66.66MHz clock but the data rate is 133.33MHz. On Athlon, while the memory bus is 100MHz, it is NOT double pumped.

EP
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