I just revieced the hp a610n as a replacement computer, and it is mediocre at best.
Motherboard: The motherboard is pretty outdated and isnt really expandable. It cannot be upgraded to the new high end PCI- E models or handle ddr2/ddr3 ram. Moreover, there are only 2 slots of ram available. So that means that if you're looking to buy this computer cheap and upgrade it later on, you're wasting your time.
Power Supply: The power supply is 300 w; it isn't recomended to run a high end graphics card on this type of model but it can handle the components inside.
Ram: 512MB of ram are included but it is the outdated DDR. The model does not justify the amount of ram put in.
CPU: The cpu is single core and runs at 2ghz. Although this isnt horrible, dual core proccessors are looking to be the base standards.
Video Card: It is integrated and shares the onboard memory. It wont run any of the new mainstream games or any fancy video editing projects.
Conclusion: This computer is meant to serve purposes of surfing the web or any other basic features. I would only recommend this computer if you're a light user but DO NOT BUY if you want to run any of the new mainstream features. Overall, you should crank up a few more bucks and buy a newer model out on the market.