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April 02, 2008

The Quest for 4 Gigs Continues

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Nearly a year ago, I reported that I'd purchased a new laptop with the dual intentions of running Windows Vista Ultimate 64-bit and getting full use of 4GB of RAM. Unfortunately, I also had to report that while I did get Vista Ultimate 64-bit running, my HP NX6325 was able to use only 2.9GB of RAM. Since then, I've watched what might be called the "4GB frontier" and I have both good and bad news to report.

First, the bad news: Once you install Vista SP1 on your system, it's going to be a bit harder to figure out if your computer is indeed using the 4GB that you purchased. Prior to SP1, a look at the System applet on Vista showed how much memory your system was using, just as it had on Windows XP, Windows Server 2003, and Windows 2000. But for some mysterious reason, SP1 changed what the System applet shows from "memory Vista uses" to "memory your BIOS reports--irrespective of whether Vista can figure out how to use it." Why did Microsoft do this? No one to whom I've talked seems to have an answer, so come on, Microsoft, knock it off--reporting how much memory that I might have if only my OS could understand it but doesn't is just plain unfair. Why not do the right thing and fix this with the next Windows update?

Meanwhile, people wondering how much RAM their system really sees have a number of avenues. First, you can open an elevated command prompt and type

systeminfo | findstr /c:"Total Physical"

Or you can just open up Task Manager, click on the Performance tab, look under Physical Memory (MB), and read the number to the right of Total. Thus, in my NX6325's case, the System applet reports 4.0 gigs on the nose, while systeminfo and Task Manager report 2,943MB.

On to the good news: There are laptops that can deliver a full four gigs to 64-bit Vista. I've heard from three users of Lenovo's T61 ThinkPad that the T61 can easily accommodate and use four gigs with Vista (and yes, I did ask them if they verified that through Task Manager rather than the System applet). Many people who own the larger "mobile workstation" lines of laptops such as the Dell Vostro 1700 or the HP Pavillion DV9700T, tell me that they get access to all of their RAM with their systems. I like the larger systems, as they offer more space and can therefore accommodate a second hard disk. But they're of course heavier than the basic business laptops, and they just plain don't fit into many laptop bags, and so might not be the optimal choice for some.

After writing about my need to hit the four-gig frontier, many of you have written to ask me why on earth I need so much RAM. The answer: virtual machines (VMs), of course! With 2.9GB usable RAM, I can just squeeze a couple of Windows Server 2008 VMs and a Vista VM onto my system before it makes the painful transition from "useful computer" to "constantly paging system that takes 10 minutes to respond to a mouse click." I know that some of you also run VMs on your workstation, so while I'm on the topic, let me pass along a tip from one of my colleagues, Dan Holme. Dan tells me that the solid state "hard disks" that plug into an ExpressCard slot are fast enough to accommodate one large VM or a couple of smaller VMs, and by his report they make VMs run noticeably faster. I haven't had time to try that out yet, but I'm definitely going to soon--products like Lexar's 16GB SSD (solid state disk) run just a bit above $200, and 16GB would easily accommodate a Windows 2008 or Vista VM. Now all we need is a laptop that lets you outfit it with 16GB of RAM

End of Article



Reader Comments
So, the bottom line is that Microsoft still can't count past 3 ... hardly news, really. That's why people who need more RAM use *nix.

mflopez April 02, 2008 (Article Rating: )


Hardly valid, mflopez. Mark states clearly some laptops make 4GB available to Windows, so it's obviously a BIOS thing. Your precious *nix won't even work on some newer laptops.

TheLanMan April 02, 2008 (Article Rating: )


I have a Lenovo's T61 ThinkPad with 4 GB or RAM, I have Vista SP1 installed, but I can see only 3 GB.
C:\>systeminfo | findstr /c:"Total Physical"
Total Physical Memory: 3,069 MB

gtopala@hotmail.com April 02, 2008 (Article Rating: )


My Dell XPX M1530 running Vista SP 1 sees all 4 GB.
C:\>systeminfo | findstr /c:"Total Physical"
Total Physical Memory: 4,093MB

yardemus April 02, 2008 (Article Rating: )


It's a combination of the BIOS and the video card. The video card is mapping itself into the 4GB addressable memory space in the system, effectively blocking access to the physicak memory in the machine. The 4GB is there, it's either the system BIOS or the video BIOS that's wrecking havoc.

jimsj April 02, 2008 (Article Rating: )


BIOS, video and chipset. Video borads can "steal" memory, but if BIOS and the chipset can't deal then you will be stuck <4GB. My Compaq 6715b (AMD chipset) will see all 4GB. Intel boards seem to have more trouble with the >3GB thing in my experience.

jb7706 April 02, 2008 (Article Rating: )


I quess I don't understand the problem. I have a Dell 1501. I replaced standard 2GB memory with 4GB (not authorized). I first ran XP 64 and then upgraded to Vista 64 because of support for ATT wireless drivers. This is a rock solid system configuration that Device Mgr thinks it has 4GB and task manager says 3.9 GB. There is a trick to finding drivers.

elarsen April 02, 2008 (Article Rating: )


I tried it with a 32 bit Windows Vista using PAE and 4GT. My asus p5B motherboard with the latest bios has a "memory remap" feature which I enabled. This then allowed the BIOS to see all 4GB where as if it was disabled it only saw what ever was shown in Performance montior of task manager, which is ~3GB.
However, whenever memory remap is enabled, Vista(SP1) only uses 2GB but the system applet still shows 4GB. Withouth memory remap, Vista sees 3GB and so does the BIOS.
Before I updated to the latest BIOS however, the BIOS only sees 2GB with the memory remap feature enable. Obviously they've fixed that with the latest BIOS but Vist still sees only 2GB.

j3rrry April 02, 2008 (Article Rating: )


Apparent from video card that is steeling some memory there is an issue with memory controller being 32bit and thus not able to see all the 4G of memory, though you may have a 64 bit capable processor.

levies,spap April 03, 2008 (Article Rating: )


I've been running 4GB's on my Asus V1S laptop since August. However, I choose Windows Server 2008 64bit as my Operating System. There are many online guides that describe how to switch this server OS to a "workstation" and I can easily say this is the best OS Microsoft has ever released.

As for the Asus V1S, another benefit of this notebook is that the drive bay is swappable so I was able to purchase a second hard drive which now contains all my VM images and this has really helped the performance with all VM development work. In addition, the eSATA port allows for an additional external SATA drive to be connected if even more VM storage and access is needed.

Good luck

cipher7 April 03, 2008 (Article Rating: )


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