I wouldn’t upgrade for Zwift!? For other gaming I could and for my VR gaming. (I have 3 times in the last year).
Here’s my situation with Zwift. I have a highi end fast machine with 1080 and was using zwift. My computer is in the kitchen area (seating area) and my wife wanted my bike out of here. I agree.
I moved it downstairs (my bike) and needed another worthy computer to run Zwift. (I have around 5 PC’s here but either they have oudated graphics or 32 bit OS).
I was given a cheap machine last week that had low specs. HOWEVER it had a slow 2dual core… and 2gb ram. I just upgraded the ram from 2 to 4 gb yesterday (21.00) and I disabled the lousy on board nVidia 6100 graphics and installed a cheapo 99.00 mini R7 ? I think it was. with 1GB video ram. These were the cheapest items I could fit that fit minimum specs.
I installed 64bit win7 (10.00) and upgraded. Last night I had it all working downstairs on the big TV. HAPPY HAPPY JOY JOY!
WORRIED about graphics… I saw no difference in them on this setup compared to my 5000.00 PC and monitors in the kitchen seating area with a 2 mo old 1080. and latest greatest everything. So no - don’t unless you want it for other games that have higher specs. Even my FPS were not noticably different. Save your money.