07-23-2009 06:42 AM
I've read threads on this forum about issues of the 32 bit os ignoring memory upgrades on the T-400. I had added the expensive new 4 GB of DDR3 memory into one memory port, with an additional port stock with 1 GB of memory- that's 5 GB of total physical memory after the upgrade. The forum threads that I had read confused me after the upgrade so I called support to clarify my doubts as to whether my 32bit XP system was in fact even using the expensive new memory.
The question to support was: Does the computer recognize and use the memory f it isn't displayed by the XP system? The short answer was yes. The explanation was that XP os cannot display the memory beyond a certain level but it uses the entire amount of phsical memory. The explanation contined to say that the only way to see the memory in XP is to reboot and press the F1 key to get into bios, where the evidence of the newly installed memory is presented. After reading the posts on the forum, I wanted to ask for a refund on the memory, due to the high expense of DDR3, which the computer seemed to have ignored. I'm not fully convinced that the memory is being used, since I've continued to have issues with sound break-up, perhaps due to a shortage of memory (this caused me to make the memory purchase). I have to trust support's answer to my query since I'm not savvy on tests for evidence.
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07-23-2009 07:03 AM
07-23-2009 09:56 AM
07-23-2009 10:23 AM
07-23-2009 11:29 AM
Well, I got an RMA for a memory return and had to settle on a 2 GB memory upgrade- to 3 GB. There should be some indication of the compatibilty issues of the memory BEFORE purchase is made. We are not all computer engineers! There was no mention of a conflict when I ordered the memory from the Lenovo site.
As for performance, I had wanted the extra memory horsepower to edit movies, create graphics, and make 3d renderings- all of which use up lots of memory. I was just told that for the money I just spent on the computer ($2600 after memory upgrade) that I could have bought a W500- one of the top-of-the line models. Of course the return period had already expired! Lenovo did give me a refund on the useless memory upgrade though. I only wish I had known about the W500, prior to purchasing the T400. That's annoying to say the least.
08-17-2009 01:21 PM
08-17-2009 01:51 PM
I have bought my W500 in June, and in the Memory Upgrade section there was an asterisk next to every configuration above 3GB, stating that to take advantage of 4GB or more of RAM one would require the 64bit OS. For video-related work you would have possibly been better served by a W500, but the T400 is still a very good machine. In your position, I would have actually gone for the 4GB of RAM, bot to have a "matched" set of memory modules, and because of some calims that even though the 32-bit OS does not allow applications to access more than 3GB of RAM, the OS itself and the shared video memory can reside in that upper 1GB, leaving more memory available. I am not sure if this is true - I run Vista x64 and wating for Win 7 to come out...
08-17-2009 03:01 PM