Hi

My computer system finally got old and it crashed. 
I asked a local repair shop for a replacement of whatever hardware 
needed to be replaced so that the computer would perform at least as 
well as before.
I got a motherboard with a video 'card' built into it, to replace my 
ASUS card, and now my DVDs are jumpy, the system hangs a lot with black 
screen, contents of windows take up to a minute to refresh, and I can't 
see text clearly in several programs.

The motherboard is a ASUS Skt. AM2, GF6150, M.ATX, 2PCI/PCI-e  .
I'm using a PC with an XP Pro OS, service pack 1.

It needs some serious tweaking.  I need advice, and to find tutorials 
that will guide me. 
First, I need a background understanding of what's different about the 
combination motherboard-video card, from the earlier style of 
components, why this is better (or worse), and what typical pitfalls 
exist which I, a dunce, should be looking to avoid.

Also, I had 1 gig RAM in the old system, and when this new board went 
in, the store gave me only half that RAM.  I thought they were adding 
this 512 RAM to what I already had (I forgot to ask if they were 
planning to upgrade with new hardware to match previous system 
performance by reducing the RAM by half).
I'm mentioning this because I suspect this cut in Memory might be 
contributing to the overall problems.  I'm hoping for information that 
will help me be clear on a few basic facts, so I have some place to get 
started. 
I don't have much familiar background understanding yet.

Thanks in advance for any and all help.
GP

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