Yeah the 6200 is a lot slower then the 5600, regardless of video ram amount. Considering neither cards gpu is very efficient even at older games past 1280x1024 anyway, the amount of video ram doesn't matter much. Older cards from the FX timeline that are solid are the FX 5700 and 5900. They were decent performers over all and could run on a 300 watt psu fine. Same with the Radeon 9700-9800 cards. Basically the same deal with them too. Any of those 4 cards would crush the Geforce 6200. I have a FX 5900 and a Radeon 9700 Pro for sale. Sent the OP a PM about them.
I had a GF 6200 512MB, and, let me tell you, it's awful... I bought it for my P4 old rig, hoping that it will at least let me run Call of Duty 2 and Dawn of War: Soulstorm maxet out. Like hell it did! I actually found that my onboard Intel 945GM on my laptop runs Sousltorm way faster at a higher resolution and with better settings! So no, 6200 is an awful card, in my experience - it is an entry-level GPU. If you want something useful for AGP, get one of the top nVidia 7000 series (7800GT?) or Radeon 4650. Do they even still sell AGP cards in your country? Impossible to find in Asia =)
Amazing.. thanks for the info, though I doubt it'll be useful now. Never knew that existed. I was always checking directly on Asus/Palit/Zotac/etc. websites when I was searching for AGP. Anyway, I never succeeded to find anything... it's amazing how fast they wiped AGP off the market.