|
| If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|||||||
|
|
Thread Tools | Display Modes |
|
#1
February 11th 07, 05:25 AM
posted to alt.comp.hardware.overclocking.amd
|
|||
|
|||
Quick DDR2 memory question
First time using DDR2
Can I use DDR2 800 in a motherboard that specs for 533/667? I don't expect it to run at 800, but can I at least use it? TIA, Amir 
|
|
#2
February 11th 07, 06:24 AM
posted to alt.comp.hardware.overclocking.amd
|
|||
|
|||
|
Quick DDR2 memory question
Amir Facade wrote:
First time using DDR2 Can I use DDR2 800 in a motherboard that specs for 533/667? I don't expect it to run at 800, but can I at least use it? TIA, Amir Grab a datasheet for one and have a look. This one advertises operation at both DDR2-800 and DDR2-667. And the clock specification tells you, in fact, that slower operation is also possible. http://www.valueram.com/datasheets/KHX6400D2_1G.pdf One difference between DDR2-800 memory and the slower ones, is the DDR2-800 chips have one additional ODT programming option. AFAIK, that doesn't stop them from being used in slower applications. In the pictures here, you can see there are three switchable options for ODT, shown in the block diagram for the RAM (figure 5, page 15). Presumably all those options are needed, for backward compatibility. http://download.micron.com/pdf/datas.../512MbDDR2.pdf In general, the memory specs are intended to encourage backward compatibiility with slower products. Paul
|
|
#3
February 11th 07, 10:51 PM
posted to alt.comp.hardware.overclocking.amd
|
|||
|
|||
|
Quick DDR2 memory question
Thanks Paul
"Paul" wrote in message ... Amir Facade wrote: First time using DDR2 Can I use DDR2 800 in a motherboard that specs for 533/667? I don't expect it to run at 800, but can I at least use it? TIA, Amir Grab a datasheet for one and have a look. This one advertises operation at both DDR2-800 and DDR2-667. And the clock specification tells you, in fact, that slower operation is also possible. http://www.valueram.com/datasheets/KHX6400D2_1G.pdf One difference between DDR2-800 memory and the slower ones, is the DDR2-800 chips have one additional ODT programming option. AFAIK, that doesn't stop them from being used in slower applications. In the pictures here, you can see there are three switchable options for ODT, shown in the block diagram for the RAM (figure 5, page 15). Presumably all those options are needed, for backward compatibility. http://download.micron.com/pdf/datas.../512MbDDR2.pdf In general, the memory specs are intended to encourage backward compatibiility with slower products. Paul
|
| Thread Tools | |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| brand name ? | Jack Tseng | Asus Motherboards | 6 | August 28th 06 05:42 AM |
| Education Please - DDR2 Memory | Peter van der Goes | AMD x86-64 Processors | 7 | July 14th 06 01:26 AM |
| quick memory question | Matt | Homebuilt PC's | 2 | March 2nd 05 11:25 PM |
| fsb speed - why does it matter? | James Hanley | Overclocking | 52 | November 7th 04 12:04 PM |
| my new mobo o/c's great | rockerrock | Overclocking AMD Processors | 9 | June 30th 04 08:17 PM |
Linear Mode
