Just a note for other older ATI hardware users/enthusiasts who want the latest version of the ATI driver
suite for use under Windows 7... (er, that was meant to mean users of older ATI hardware, not old users of ATI hardware
ATI support sent me to the 9.1.3 build of their 64-bit Catalyst drivers
for Windows 7 x64 a bit over 2 weeks ago, and unfortunately, that driver set hasn't been updated since then.
And since the PCIe X1600XT (and similar X-series and 9xxx series cards) are now in "legacy support" mode, ATI won't be providing support (or, presumably, driver updates) until after their "build 7600 compatible" drivers are finalised. If they do provide updates sooner, it will only be on a "best effort" basis. That could work either way, I suppose...
I guess that's the way the cookie crumbles (drivers compile?) these days. But hopefully, this might help to minimise disappointment for others like me with perfectly acceptable but superseded hardware...
If anyone does get info about the Windows 7 drivers for the older cards, please let us know! I'll do the same.