Robert, You don't say what benchmarking method you used to compare 64 bit and 32 bit Windows - Generally, it will only manifest itself where one program (or a combination of programs) want to access more than 2GB of RAM in one go - it's always going to be faster to talk to RAM than to page things on and off the pagefile.sys on your hard drive.
I can't vouch for the ability of any modern OS to run "ancient DOS apps", but in general I tend to find it's a risky strategy to use obsolete software for things that you rely on to get your work done. There'll be no vendor support. ------------------------------ Message: 2 Date: Tue, 11 Feb 2014 10:02:18 -0800 From: Robert Lauriston <rob...@lauriston.com> To: "Davis, David" <david.da...@invensys.com>, "firstname.lastname@example.org" <email@example.com> Subject: Re: Compatibility of old(ish) Software with Windows 7 Message-ID: <can3yy4aazjqgvo3+rhrbvvwdwwofofnpghwihaphcvnnncc...@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 The memory limit is per process. There are various ways that 32-bit applications that need more than 2GB of memory (which few do) can use it in 32-bit Windows. I worked for 18 months with 64-bit Windows 7 at work and 32-bit Windows 7 at home. I saw no performance difference. I had both 64-bit and 32-bit Photoshop on the work computer and the only difference I noticed was that it took much longer for the 64-bit version to load. The only significant difference was that I could run things at home I could not run at work. XP Mode had problems. 32-bit Win7 can run ancient DOS apps, 64-bit can't. On Mon, Feb 10, 2014 at 12:52 AM, Davis, David <david.da...@invensys.com> wrote: > Personally I wouldn't do it that way - as you then don't get the advantages > 64 bit windows offers with being able to address more RAM - in 32 bit Windows > you can only use a couple of GB. With a busy PC, big documents, big graphics, > video etc you can easily use more than 2GB of memory. > > The pro editions of Windows 7 offer an "XP Mode" for running old applications > (Basically it runs them inside a virtual machine of Windows XP - but > transparently, once you've set it up, you just click the program's icon to > launch it like any other, and it appears to be running in Windows 7, and can > access your Win7 filesystem seamlessly). I've never yet encountered an > application that couldn't work in XP mode like this, even 16 bit (!) ones > designed to run on Windows 3.1. > From: Robert Lauriston <rob...@lauriston.com> Install Windows 7 32-bit > rather than 64-bit, fewer potential compatibility problems. *** Confidentiality Notice: This e-mail, including any associated or attached files, is intended solely for the individual or entity to which it is addressed. This e-mail is confidential and may well also be legally privileged. If you have received it in error, you are on notice of its status. Please notify the sender immediately by reply e-mail and then delete this message from your system. Please do not copy it or use it for any purposes, or disclose its contents to any other person. This email comes from a division of the Invensys Group, owned by Invensys plc, which is a company registered in England and Wales with its registered office at 3rd Floor, 40 Grosvenor Place, London, SW1X 7AW (Registered number 166023). For a list of European legal entities within the Invensys Group, please select the Legal Entities link at invensys.com. Invensys PLC is owned by the Schneider-Electric Group. You may contact Invensys plc on +44 (0)20 3155 1200 or e-mail recept...@invensys.com. This e-mail and any attachments thereto may be subject to the terms of any agreements between Invensys (and/or its subsidiaries and affiliates) and the recipient (and/or its subsidiaries and affiliates). _______________________________________________ You are currently subscribed to framers as arch...@mail-archive.com. Send list messages to firstname.lastname@example.org. To unsubscribe send a blank email to framers-unsubscr...@lists.frameusers.com or visit http://lists.frameusers.com/mailman/options/framers/archive%40mail-archive.com Send administrative questions to listad...@frameusers.com. Visit http://www.frameusers.com/ for more resources and info.