1GB of memory is not a problem, any dual-Socket A motherboard out there should be able to support this. However, as the only dual-Socket A chipset, the AMD-760MPX will only support memory-speeds up to PC2100/DDR266, running your memory at PC3200 speeds is NOT an option with a dual Socket A setup.
Since ALL Athlon MP's run at a 133/266MHz FSB, there wouldn't be much of a gain in performance, anyways. PC3200 DDR-SDRAM is fully backward-compatible and will run at PC2100 speeds without problems...so you can use it on a dual Socket A board(make sure you manually set your memory frequency to 133MHz, tho).
------------------------- The opinions expressed above do not represent those of Advanced Micro Devices or any of their affiliates. <center><font color=red>MODERATOR</center></font> AMD Athlon 64 X2 6000+ 89W :: Asus M2N32SLI Deluxe :: 2x1024MB Muskin XP2-6400 DDR2-800 :: BeQuiet! Darkpower Pro 530W :: 2x WD Raptor 74GB/10k rpm, RAID 0 :: ATI Radeon X1950XTX