What is the best way to assemble a PC from old iron for grandfather?

Question

Do it yourself

Situation:
There are 2 sets of hardware
1. Intel Celeron 1.7GHz + m/b Epox p4vmm2 socet 478 DDR1, DDR2, AGP 4x + DDR1 2x256Mb
2. AMD Athlon 64 3200+ + m/b ASUS m2npv-vm Socket AM2 DDR 2, PCI -E
yes
- 300W PSU,
- 2 video cards - 1. Geforce GF6600 256Mb PCI-E 16x 2. Geforce 4 mx440-8x AGP 8x - HDD - some kind of 7200 rpm segate
for 200Mb IDE either my mother (his daughter) or my sister (his granddaughter) is always with him, grandfather often watches TV. We have a desire to assemble a system unit to this TV through a TV-out on a video card (you will have to buy it) so that it can watch something other than news, for example, Mosfilm classics from YouTube.


I first assembled an Intel-based PC, installed XP SP3 + updates, after installing firefox - the PC, which worked and loaded quickly, began to freeze, showing 100% CPU usage, office 2003 works tolerably.
Question:
Which of the 2 sockets is more promising to upgrade in order to comfortably surf the Internet today? Or is it worth it to score and take a PC based on socket 775?

Answer 1

A useless option to rivet HTPC on old hardware, and even with 256 RAM, it's hard to get a normal option.
It’s better to buy an android tv box from the Chinese, they are from $ 30, take a version with 1GB of RAM or more, but it doesn’t take up space and doesn’t make noise and almost doesn’t eat light. Any YouTube or cinema application from the market and not only, HDMI + CVBS RCA on board - connect even to a plasma, even to an aquarium. This is currently the best option.

Answer 2

Memory. Without 2 gigabytes, there is nothing to do at all (it will be uncomfortable)
Maybe it will turn out to be brought up to 4?