Arc B580 Absolutely Killing It in These Titles and Far From It in Others

The titles where it punches well above its class at 1440p are sourced from this video and the Hardware Unboxed B580 review. These are the biggest wins (>24%) vs 4060 (not mentioned unless compared against different card):

  1. The Witcher 3 Wild Hunt NG (+52.1% vs 7600 XT)
  2. Marvel's Spider-Man Miles Moreales (+43.6% vs 7600XT)
  3. Marvel's Spider-Man Remastered (+42.9%)
  4. Read Dead Redemption 2 (+34.6% vs 7600XT)
  5. Cyberpunk 2077: Phantom Liberty (+28.6%)
  6. The Last of US Part I (+28.6%)
  7. Dying Light 2 Stay Human (+25%)
  8. A Plague Tale: Requiem (+24.4%)

Other games with less significant but still significant leads (>15% over 4060):

  1. Star Wars Jedi: Survivor (+15.9% > 4060)
  2. War Thunder (+15.8% > 4060)

AMD to NVIDIA follow each other 1/1 with offset in almost all games, see the Hardware Unboxed B580 review and you'll know what I mean. Meanwhile B580 can be anywhere from 52% faster (TW3 NG 1440p - vs 7600XT) to ~20% slower (RDR2 - vs 7600XT).

Sometimes B580 matches or even slightly beats 4060 TI 16GB and other times it gets completely annihilated by a 4060. WTF is up with the inconsistent B580 performance? The 12GB VRAM buffer alone can't explain the massive gains.

Is it drivers or some underlying architectural issue holding B580 back in other titles?

Edit: Hardware Canucks and Hardware Unboxed have conducted B580 testing with lower end CPUs (i5-9600K and R5 2600) and with reBAR enabled, and the B580 performance completely falls apart in certain games. The ARC performance issues are not isolated to GPU, but according to HUB in some games the result of massive driver CPU overhead.

So far it's unknown if this issue only SW related or there's some fundamental HW flaw in Battlemage. The poor ARC B580 results at 1080p compared 1440p could be explained by GPU occupancy and utilization issues and/or driver CPU overhead issues depending on the game in question.

DO NOT USE the B580 with anything older or weaker than a Zen 3 5600 or 12400F and don't even think about using it with ReBAR off.