I am planning to buy a new system with AMD Athlon 64 4600+ X2. As a developer I want to keep on using the good old Windows XP 32.
Does all usual 32 bit software run on 64 bit CPUs ? Are there any issues I should be carefull about ?
More aboutregular windows home athlon 4600
With 32-bit windows, the athlon 64s behave just like ordinary 32-bit cpus. I believe winxp home and pro both support dual cores, but may need to do windows update before the second core is utilised.
This is a very common question about 64-bit processors.
As you know, Windows XP is 32-bit, but your processor is both 32-bit and 64-bit. It will run 32/64-bit applications both with ease.
64-bit means little today. You could upgrade to XP 64-bit, but then you need 64-bit programs and there is a lot of hassle. Not worth it. Just do everything the same as you would do with another processor.
Also, forget anything about XP Home incompatability with dual-core. You will be fine. EDIT: You may need an update, as has been mentioned.