+1 for the above posts. You do NOT want to use a 32-bit OS for a new build. I would go with one of these:
Oops! It was a silly typo...all choices meant to be 64-bit in my post
Here's the comparison of the different versions of Windows 7:
Phew! I did freeze Windows 7 Pro 64-bit - Pack for System Builders - OEM.
Kindly note that I need to import this software from the US portals like Newegg. I never brought this type of version, will they sell to individuals (am not a system builder!)? Should I need to produce extra paperwork etc?
1) Do you qualify for an academic license?
If so, you can get W7 at a discounted price.
2) Look for an upgrade version of home premium instead of OEM.
Upgrade is a retail version which gives you support from microsoft, unlike OEM(AKA system builder),
and allows a more hassel-free ability to transfer the os to a different pc(motherboard).
Upgrade will come with both a 32 bit dvd and a 64 bit dvd.
There is a legitimate two step instalation process to install an upgrade version without a previous OS.
You install vista from the dvd, but do not initially enter the product code.
Just tell the install which version you bought, and do not activate.
After it installs, you have a fully functional OS for 30 days.
Step 2 is to insert the cd again, while running W7 and then do an upgrade.
This time, enter your product code, and activate.
After activation. you may delete the initial version which is named windows.old.
3) Do you possibly need Ultimate? There are very few features that the home user would want.
Check out the differences on the microsoft W7 web site.
If you get a retail or upgrade version, you will still be able to upgrade to ultimate later.
No, am a researcher and those planned PCs are meant for my scientific staff in a Pharma company. Actually, am gonna phase out 5 year+ old Intel 875P based PCs. I need 20 numbers for them and 1 for me in the office. First, I must assemble 1 PC and test it thoroughly (with a little OC upto 4.2 GHz too), with a few simulation tools etc. and the Graphics card results (important to us).
Look for an upgrade version of home premium instead of OEM.
Upgrade is a retail version which gives you support from microsoft, unlike OEM(AKA system builder)
You added quite a good points, thank you so much. Those PCs have WinXP Pro (think corporate license), now I would like to buy new licenses without any upgrade option because we need fresh installed PCs, it's a must for those R&D guys). So, I would like to go for Windows 7 Pro x64 (willing to take little $ hit). So, you suggest a Retail DVD is better than a OEM one?
Do you possibly need Ultimate? There are very few features that the home user would want.
Do I need Ultimate? No, am almost sure that Win 7 Pro is more than good enough for the daily R&D requirements. But, I saw modeling/simulation apps work with better efficiency on a x64 PC compared to x32. I don't know whether Windows 7 Pro works as x64 PC with 4 GB RAM or not? I read somewhere I have to install more than 4 GB RAM to get the x64 feature. If that's the case, I might go for 8 GB RAM since a member here said that 6 GB RAM (2x3) DDR3-1333 MHz Dual Channel memory is incompatible! Could you please confirm on these points?
I don't know where you've been reading, but whether you install a 64-bit or 32-bit OS has nothing to do with how much RAM the system has. You can install a 64-bit OS on a system with 2GB of RAM, but it wouldn't make any sense to do so. We recommend a 64-bit OS with 4GB of RAM so you can fully use all 4GB of RAM.
64-bit Windows 7 Pro will work just fine with 4GB of RAM.
Let me assume that you decided on windows-7 pro 64 bit version.
Buy one full version(or upgrade) toget support if you need it, and then enough 3 pack oem packages for the rest.
Unless you know that linux will run all your required software today, and in the future, I would not open up an unknown can of worms.
Yes, am firm on Windows 7 x64 but I need 21 licenses (first me gonna buy one and later 20). I don't know if Win 7 pro has any corporate model like XP, will contact the local MS partner tomorrow. Linux is not definitely a can of worms but it's very true that porting the existing Applications is a big challenge (and costs a lots), am also facing little resistance from almost half the technical staff Here are two questions:
In my country, full Retail version of Windows 7 Professional costs me $230 plus but how come US guys are paying a lot more? And, is the download option from Microsoft website is the best choice or buying a DVD pack?