I use a HP Z620 with two cpu's(though Strike fighters 2 obviously doesn't use the second) Xeon E5-2670's@2.6GHZ up to 3.3 boost with a GTX1070 at 1920x1080 Not bad for old school gaming but lacking on unlimited setting especially in Vietnam Strike fighters2. I decided i needed to try NVME which the ZX20 series of workstations doesn't really support. I bought a Z440 for $150 with win 10 already on it. Bought a Team 4 GB NMVE and a cheap PCIE card to mount it on. Bifurcated the slot for 4x4x4x4 copied the os to the NVME. Bought a $300 new GTX3060 running at 3840x2160(yeah I'm a tightwad buying workstations to use) E5-2699v4 @2.2GHZ-3.3GHZ. But then I read you could use an I7 6900K even though it's not advertised by HP. So i grabbed a new one for about $100 and put that in.
I went from single frames in unlimited settings in Vietnam to 60 average, 112 high and 21 low with a cheap ugrade in computer generation....Gonna grab another Z440 with a Xeon 1620v4 for my daughter and a GTX3050 so she game decently (big unreal tournament online fan@30years+ old lol). Will be buying another Z440 for my network and putting another I7-6900K in it as well as a NVME HD, and don't know what video card yet as they're insane prices going on now. But anyway point of my post is you can build yourself a cheap budget gaming rig with these workstations that will run everything but the biggest and greatest games.