Tired video card???

My Nvidia GEForce GT220 video card is getting a little long in the tooth and I'm wondering if that could be the cause of recently occurring choppy video. I'm not talking about the likes of Youtube videos. Actually it's on a self improvement site Lumosity; where there are graphical challenges and the video is so choppy it's almost impossible to carry out the tasks. This happens on this site in both Windows 8.1 and Mint. Everything else graphically looks fine, but does anyone know if an aging video card does in fact lose some of its' former vitality?
I'm thinking of buying a new video card, but don't want to do so and find it's something else.

TIA, Allan

It can but mostly manifests thru overheating. Changing paste or pad between heat sink and cooler can help there. It could also be that they started using more demanding program or video on that site and that this GPU is not enough now.

CountMike said:

It can but mostly manifests thru overheating. Changing paste or pad between heat sink and cooler can help there. It could also be that they started using more demanding program or video on that site and that this GPU is not enough now.

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Temperatures seem quite normal according to CPU Z. Maybe like you said Lumosity has upped their video demands. Although I don't have the problem on my laptop; which I thought was less nourished than the PC.

Solved: Edit. Oops I was wrong there. I hadn't done Lumosity on my laptop for a while. I think it's worse than the PC. So I'll say solved for this. Thanks again.

Thanks, Allan