News Pick Up AMD's Ryzen 7 5800X3D For Only $299: Real Deals

I have a 5600x with a 3080, play at 1440p. Realistically, what gains could I see with the upgrade?

Well, depending on what game you're playing it could be anywhere from 5-20%. Here's a couple of example games: RYZEN 7 5800X3D vs RYZEN 5 5600X vs RYZEN 7 5800X | Test in 5 Games | 1440p - YouTube

But there are a lot of games that don't respond to the extra cache. It's really down to your specific needs. Worth checking what games run better v what you have to see if it's a justifiable upgrade.

With that said, if we got these deals in Ireland, then I'd be jumping right on that gravy train :tearsofjoy:
 
I would see pretty solid gains, in WoW, even over my current 5800x. Poorly threaded titles in general should see substantial gains.
I went from a 3900x > 5800x3d when it came out and it was a massive boost to everything, even 1440p with a 3080. It felt like i got 2 gens of performance increases in games while i got 1 get of CPU general performance increases. It only slightly loses to the 3900x in multi core work.