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I'm not going to call you a liar but I'll be honest, I don't think that statement is true. Windows 7 will fully run an XP environment within itself giving you the same thing. In fact, if you have a 16-bit app there is a very good possibility you are running in compatibility mode in XP already!
I keep seeing 64-bit mentioned, new version of Windows 7 and Vista come in 32 AND 64-bit versions. Although if your hardware supports it, you should be running 64-bit, no exceptions.
You are correct that it's not officially required - just as you can run Windows 7 itself in a single gig of RAM (32-bit) or 2 (64 bit). However, if you've tried it without VT, you know it's about as practical as running 7 in a gig of RAM - it's very slow.
You may not officially need VT - but practically speaking, you do.
You can run Windows 7, and Vista on 1GB of RAM fine. The OS itself will perform perfectly fine depending on what you are doing. If you are photo editing or gaming 1GB would not be enough. However, the OS itself will run fine, not great but fine.
My wife's 1501 came with only 1GB running Vista and she was ok with it for a long time until I upgraded it to 2GB. She never complained about it being slow. You'll see more paging, which can obviously have an impact on performance but by no means is it totally unusable.
Nowadays with 64-bit there is no reason not to configure a PC with a minimum of 4GB RAM though.
I'm just curious, what makes you say that? You have experience with this? I've been running virtualization on my desktop, laptops, etc... sometimes server virtualization for quite a while now on hardware that does not have VT.
Seems Microsoft agrees:
Question: Is hardware virtualization a must-have to run Windows XP Mode?
Answer: No. Windows XP Mode can be run on a CPU without hardware virtualization.
Question: Is hardware virtualization better?
Answer: For Windows XP Mode the performance will be more than acceptable with or without hardware virtualization. For developers using Virtual PC with Windows Vista or Windows 7 virtual machines we recommend HAV as the non-HAV is only tuned for XP Mode.
From the FAQ: http://www.microsoft.com/windows/virtual-pc/support/faq.aspx.
Very typical in these forums to read assumptions and cliches passed off as truth and reality.
I believe new CPUs have VT making this point moot however. Don't be scared of older hardware, I'm talking four years or so, it can run 7, virtualization, etc... just fine provided you have 2GB or more of RAM.
You have a different standard of usability - in 1G Vista or 7 is just about useless once you load a few applications.
Yes, I have used XP mode/Virtual PC. There's a night and day difference between VT and non-VT for XP mode. Anyone needing to run apps under 7's XP mode is much better served with a VT-capable CPU than in emulation mode. And there are other virtualization technologies that perform better than Microsoft's own - and they generally DO require VT support.
ejn63
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Posted August 16th, 2010 20:00
Yes, though neither 32-bit OS will show more than 3.2 G of RAM, and you'll be on your own to find drivers for either OS.
You may have to settle for partial functionality with XP -- that's a 10-year old OS on a brand new computer, after all.