Nomake Wan
05-08-2007, 02:05 AM
I've got a Portege M200 with a serious problem. It runs fine with the stock 2 x 256 MB chips; RightMark Memory Analyzer reports the chip information, and that it's running in dual-channel mode. Cool. Only I hit the 512 MB limit a lot, so I've been wanting to upgrade.
I tried putting a single 512 MB chip in once and adding one of the stock 256 MB chips along with it, but this resulted in a downgrade in performance. I assumed that it was a lack of dual-channel.
But today I picked up two matching PNY 1GB PC2700 chips and installed them... and the same thing is happening. It's noticeably slower than the stock memory, and RightMark Memory Analyzer reports an "N/A" on Channel Mode and Command Rate (even if it's in single-channel it should at least report that).
Windows reports the proper amount of RAM in all cases, and the chips are seated properly. But the 2 x 256 MB is just faster... What's going on?
I tried putting a single 512 MB chip in once and adding one of the stock 256 MB chips along with it, but this resulted in a downgrade in performance. I assumed that it was a lack of dual-channel.
But today I picked up two matching PNY 1GB PC2700 chips and installed them... and the same thing is happening. It's noticeably slower than the stock memory, and RightMark Memory Analyzer reports an "N/A" on Channel Mode and Command Rate (even if it's in single-channel it should at least report that).
Windows reports the proper amount of RAM in all cases, and the chips are seated properly. But the 2 x 256 MB is just faster... What's going on?