Niall O Broin wrote:
>I'm in the middle of building a couple of boxes which use PC2700 DDR RAM. As
>I always do, I ran memtest overnight on the boxes which found me one very
>slightly dodgy RAM stick. But more to the point, the DIMMs are of two
>different types and when running memtest, one type shows an access speed of
>~500 MB/s and the other ~600 MB/s. The slower has a label showing clocks of
>2.5 3 3 - the faster has no clock labelling. I've been googling and found a
>mention of "These modules are programmed for CAS 2.5-3-3 operation at 333MHz
>via the serial presence detect (SPD) EEPROM.". Does this apply to all PC2700
>RAM ? If so, what can explain the difference in speed in these two modules ?
>BTW it is the memory as I switched the twqo modules in question between two
>different boxes and the speeds stayed the same.
>Well there is CAS 2.5, and 2.0. The 2.0 is faster as the letency is lower
>>>>Niall
>
Maintained by the ILUG website team. The aim of Linux.ie is to
support and help commercial and private users of Linux in Ireland. You can
display ILUG news in your own webpages, read backend
information to find out how. Networking services kindly provided by HEAnet, server kindly donated by
Dell. Linux is a trademark of Linus Torvalds,
used with permission. No penguins were harmed in the production or maintenance
of this highly praised website. Looking for the
Indian Linux Users' Group? Try here. If you've read all this and aren't a lawyer: you should be!
