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#1
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200 or 400Mhz?
Hello:
I have a question about FSB. Memory manufacturers are marking memory which is DDR PC3200 running @ 400Mhz. Shouldn't that be 200Mhz and 400FSB? From what I understand, DDR gets twice the amount of data in one clock cycle compare to SDRAM. |
#2
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FSB - Front Side Bus, not memory
Real clock for PC3200 - 200Mhz, DDR gives double transfer rate - 400Mhz -- NP: Winamp inactive... "chris" wrote in message ... Hello: I have a question about FSB. Memory manufacturers are marking memory which is DDR PC3200 running @ 400Mhz. Shouldn't that be 200Mhz and 400FSB? From what I understand, DDR gets twice the amount of data in one clock cycle compare to SDRAM. |
#3
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"chris" wrote in message
Hello: I have a question about FSB. Memory manufacturers are marking memory which is DDR PC3200 running @ 400Mhz. Shouldn't that be 200Mhz and 400FSB? From what I understand, DDR gets twice the amount of data in one clock cycle compare to SDRAM. yup for DDR: PC1600 = 100/200 mhz PC2100 = 133/266 mhz PC2700 = 166/333 mhz PC3200 = 200/400 mhz the PC3200 bit means maximum theoretical bandwidth, that is, a stick of ram running at 400mhz can transfer 3200 meg bytes of data per second, hence the pc number to identify ram, look for mainly the PC number, and confirm with the mhz rating |
#4
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On Mon, 18 Jul 2005 15:12:43 -0400, chris wrote:
Hello: I have a question about FSB. Memory manufacturers are marking memory which is DDR PC3200 running @ 400Mhz. Shouldn't that be 200Mhz and 400FSB? It should be 200MHz. It has nothing to do with the FSB as ram has it's own bus. The 400MHz is bogus marketing BS. The true bandwidth is right in the PC3200 number. 64bits x 200MHz x2 (ddr)= 25600Mbps / 8= 3200MBps. You will see many people that will argue that using 400Mhz is correct, but that's just BS from people that really don't understand the data rates (400Mbps per line) can't magically be changed to MHz just because it looks good. Would you call a 56Kbps modem a 56KHz modem? No. Same thing applies. From what I understand, DDR gets twice the amount of data in one clock cycle compare to SDRAM. And you understand it correctly. -- KT133 MB, CPU @2400MHz (24x100): SIS755 MB CPU @2330MHz (10x233) Need good help? Provide all system info with question. My server http://wesnewell.no-ip.com/cpu.php Verizon server http://mysite.verizon.net/res0exft/cpu.htm |
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