We used GFXBench and 3DMark Ice Storm to test the HP Pro Slate 8's graphical capabilities. GFXBench has been one of our standard graphics performance benchmarks for a while, though we also supplemented it with Futuremark's 3DMark Ice Storm Unlimited benchmark as well. (In order to ensure V-Sync and resolution aren’t limiting factors, we compared GFXBench's offscreen test results.)
Once again, the HP Pro Slate 8 performed pretty well on the benchmarks. It's close to the top, but not the top, on GFXBench's 1080p T-Rex Offscreen test; it performed a little worse on GFXBench's 1080p Fill Offscreen test, but it wasn't going to cough up the same performance as, say, Apple's iPad Air 2. Against its direct competition, the tablet is pretty competitive, but it would be better if the HP Pro Slate 8 was priced similarly to its better-performing peers.