I hate to rain on your parade but I seriously doubt this happening. To put this in perspective it is VERY hard to do what you're doing at that price point with a DESKTOP, even used, unless you find some great deal.
Perhaps if you can rethink your budget I can find you something
Here I drew a diagram. I apologize its not perfect I'm not an artist haha. Click Here To View It
Hope this solves your problem!
Merry Christmas,
Signal
Hey all,
I'm interested in upgradeing my audio.
From what I've read a studio headphone/external mic is much better than a "gaming" headset, but If there is a headset you guys strongly reccomend that also has good sound of music I'd certainly consider it.
As far as what I'd use the new...
Your card is most likely soldered on to your mobo, so in short no. There are options for external gpu's, that you can do some digging into. Also, what do you need to upgrade your gpu for?