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Skweetis · 03-30-07, 10:30 PM

"DDR2 DIMMs are not backwards compatible with DDR DIMMs. The notch on DDR2 DIMMs is in a different position than DDR DIMMs, and the pin density is slightly higher than DDR DIMMs. DDR2 is a 240-pin module, DDR is a 184-pin module."

"DDR2 was introduced in the second quarter of 2003 at two initial speeds: 200 MHz (referred to as PC2-3200) and 266 MHz (PC2-4200). Both perform worse than their DDR equivalents since heightened latency makes total access times twice as long in the worst case scenario. However, DDR will not officially be introduced at any speeds above 266 MHz (533 MHz effective). DDR-533, and even DDR-1200 SDRAM exists, but JEDEC has stated that they will not be standardized. These modules are mostly manufacturer optimizations of highest-yielding chips, drawing significantly more power than slower-clocked modules, and usually do not offer much, if any, higher real-world performance."

So basically at 200/266, you could have DDR or DDR2...

This is why I hate hardware

So, Hartman... double check the specs of your board. If you currently have DDR2 266 and go to 400, Rock on... other wise it wont fit. Best case, type the serial number from one of the chips on your 266 ram into a search engine, and you will probably find out if it is DDR or DDR2

03-30-07, 10:30 PM	#6
Skweetis Watch Officer Join Date: Sep 2001 Location: Cambridge, Canada Posts: 335 Downloads: 39 Uploads: 0	"DDR2 DIMMs are not backwards compatible with DDR DIMMs. The notch on DDR2 DIMMs is in a different position than DDR DIMMs, and the pin density is slightly higher than DDR DIMMs. DDR2 is a 240-pin module, DDR is a 184-pin module." "DDR2 was introduced in the second quarter of 2003 at two initial speeds: 200 MHz (referred to as PC2-3200) and 266 MHz (PC2-4200). Both perform worse than their DDR equivalents since heightened latency makes total access times twice as long in the worst case scenario. However, DDR will not officially be introduced at any speeds above 266 MHz (533 MHz effective). DDR-533, and even DDR-1200 SDRAM exists, but JEDEC has stated that they will not be standardized. These modules are mostly manufacturer optimizations of highest-yielding chips, drawing significantly more power than slower-clocked modules, and usually do not offer much, if any, higher real-world performance." So basically at 200/266, you could have DDR or DDR2... This is why I hate hardware So, Hartman... double check the specs of your board. If you currently have DDR2 266 and go to 400, Rock on... other wise it wont fit. Best case, type the serial number from one of the chips on your 266 ram into a search engine, and you will probably find out if it is DDR or DDR2 __________________ "Is the glass half-empty? Or half-full? Either way, when you're thirsty, there's water to be had in that glass." - Neal Stevens