The 754 2800+ has the same speed in MHz (1.8GHz)than the 939 3000+. The only difference is that the 3000+ is dual channel. Dual channel give a boost on average of 6% over single channel. So, if you are money limited, the 2800+ is not a weak CPU. I would say that my 939 cpu is a weak one compared to the 3000+ socket 754. Just like the 3000+ s754 has the same speed in MHz (2.0) than the 3200+ s939. So, the 6% advantage that dual channel has over single is lost to the 10% drop in MHz.
Socket 754 will be the future plateform for Sempron CPU. So, you'll be able to find other CPU in the future, I guess. Going single channel, mean cheaper memory, as one stick is needed opposed as 2 for dual channel. See, the 939 3000+, with one memory stick will be as fast as the 2800+... Just like Intel has pentium and celeron, AMD will have Athlon and Sempron.. Now, they have Athlon XP s462, sempron s462, sempron s754, athlon 754 and athlon 939. They want to clean their line and that why the 754 wont be called athlon anymore.
As for board for S754, I have good succes with the Soltek k8an2e-gr with 2800+ and 3000+ CPUs. It is based on the nforce3 250 gb. So you may add it to your list if it is available in your area.
Since you seem on a budget, it is clear that socket 754 will offer you more for your money. And since you'll keep it for 2-3 or more years, new technology will be available at upgrade time that you probably will considering updating the motherboard and cpu too. Even if you upgrade only the cpu later, you wont see much of improvement because there is more severe bottleneck in a system than the cpu. The HDD is the worst for overall system speed. Apps and games are becoming better and bigger, so loading time increase as well as data. Some years ago, 1-2 megapixels digital camera were mainstream. now, we are talking about 4-5 megapixels. That makes your picture bigger.
A good HDD will improve overall speed for loading and working with data. That is what I will consider for your next component to upgrade.
To put it simple, SATA is the interface between the drive and the controller. See, the drive is still an IDE and the controller is still an IDE controller. SATA improve by moving data in a serial pattern instead of a parallele pattern.
So, SATA is the interface. a SATA HDD is an IDE HDD that use a SATA interface. Same for a SATA controller. It is an IDE controller that use a SATA interface. Serial need smaller wire and d is not subject to crosstalk between wires as Parallele ATA(PATA) That why you see 40 wires ribbon for ata 66 and less IDE drives and 80 wires for ATA100 and more IDE drives. An additionnal wire is place between each data wire to prevent data wires to be one next to the other. So, serial will be able to go faster when drive technology will be up to the interface.
I dont know what kind of video card you have, but that is much more important in game to have a fast video card than a fast CPU. Even the 2800+ will be able to keep up with fast AGP video card. So, you could consider upgrading that too, when you'll feel the need.
<font color=red>Sig space for rent. make your offer.</font color=red><P ID="edit"><FONT SIZE=-1><EM>Edited by Pat on 04/11/05 12:46 PM.</EM></FONT></P>