How can I tell if a new video card will work in my old PC?

[mptyness]

The illustrious Miller (you the man) recommended this card and I'm inclined to purchase it:

http://www.newegg.com/Product/Product.aspx?Item=N82E16814125281

However, I've delved into the world of motherboard interfaces and such without gaining much of a coherent comprehension into the topic and hope someone can help me navigate. I have a GeForce4 card in the old PC at the moment but it's starting to get quirky (yellow lines, sometimes red sheens on the monitor) but for the life of me I cannot figure out if the above mentioned video card will function in the computer.

Any advice ya'll?

[The Dude]

What type of slot is available on your mobo? What else would lead you to believe it wouldn't work.

[mptyness]

I'm told it's an AGP. I've been reading about differing voltages depending on the mobo and interface type and am worried that I can fry a perfectly good card if I do it wrong. Is this an erroneous assumption? And don't the interfaces on the mobo vary considerably? I seem to remember reading and looking at a pictorial with various slot types.. 

uggg. Am I making this more difficult than it needs to be?

[mptyness]

I should add that I've verified that the card I'm interested in replacing with a Radeon HD 4650 1GB 128-bit GDDR2 AGP 8X is a Nvidia GeForce4 Ti 4200. I cannot determine if it has 8x capability. Anyone have a trick for figuring that out?

[prouton]

We'd need to know the make/model of the motherboard, or at least the system unit if it's a factory made one (like from HP or Dell).

[The Dude]

Which card you had previously doesn't really matter it really just depends on what your mobo has available. As Prouton said knowing more about what mobo you have would help but I do think you're making it a little too complicated for yourself.

[Miller]

I thought about mergin these threads, but didn't. Here's the old thread this was referencing:
http://forum.byopvr.com/dvr/index.php/topic,10903.0.html

Which means it's a Gateway ATXAEG LX2 700X as mentioned in this post:

ALSO, can I use the PVR350 and a dual-tuner card in the same computer? I'd hate to have it be a complete waste. I'm using a ~ 7 year-old Gateway, XP-pro, model # ATXAEG LX2 700X. I'm not savvy enough to tell you the motherboard and other stats but I do have empty slots another tuner card can fit into.

But I couldn't find specs on it. You might need to call Gateway and ask them what AGP version the motherboard has.

[prouton]

Grab the serial number off of your box and head over to the Gateway support site -- you're not going to get very far with the model number.

[mptyness]

Nice, the serial look-up was key. I've found this:

Intel (Lexington 2) Motherboard 2.53-GHz P4

Video    AGP connector supporting 1.5-V 4X AGP cards only


Since this is way out of my league, does this eliminate the possibility of using the aforementioned video card? What are my options if this is indeed the case?