I have been using the ASUS version (128bit version) of the low-profile GT430 for 10 months now, and have installed them in all 3 of my 'small form factor' HP 6005 desktops. The card works fine, though Nvidia lists it as using 49watts 'max' and requiring a 300watt case power supply, and HP lists the PCI-e x16 slot in the 6005 SFF at 25watts (with a 240 watt case power supply).
To reduce power consumption (and gain performance) I've replaced the 'stock' CPU with AMD Athlon II dual-core 270's (3.4ghz at 65watt, though CPU-Z shows it running at 59watts) and the standard 3.5" SATA disk drive with Seagate 500gig 2.5" XT 'hybrid' drives (2 - 5 watts instead of 12).
I can play LOL online at almost full settings (max resolution for my LCD 'wide' monitor) and WOT online at decent settings.
I'm looking to get the 'mini-tower' version of the 6005 PC and see if I can use the Palit overclocked version of the GT460 in it. Nivida lists 'that' at 160watt max (less then 3-times that of the gt430) and needs a 450watt case power supply (50% more than they stated for the gt430). Since HP shows the PCIe x16 slot is rated for 75watts (3 times that of the SFF case) and comes with a 320watt case power supply (33% greater than the SFF case) I might just be able to get it to work...