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can i crossfire amd rx 460 with amd rx 580/570 with antec 600w

rx 460 2gb
and rx 570/580 8gb
how many vram i vill get in games 8 or 2
600w is enough?
the power supply is antec vp600p
Reply to Harel_Elisha1
4 answers Last reply Best Answer
More about crossfire amd 460 amd 580 570 antec 600w
  1. Doesn't makes any sense. You will get not as good performance as with one rx 580. Don't get the sapphire version. I had two of these and both had problems. Get gigabyte aorus rx 580. Also 600w psu is not enough for crossfire as it can cause crashing the system even though I think it would work , but I don't know anything about crossfiring rx 460 with rx 570. Rx 470 with rx 580 and rx 480 with rx 570 yes it works. But the lower end card might not work. :)
    Reply to jakubek160
  2. Last I heard, vram still does not add up in crossfire. So if you crossfire a 2gb and a 4gb card(crazy idea), you'd have 2gb of vram as far as the game is concerned. This is one of many reasons why crossfire and SLI are not recommended in most cases. 99 people out of 100 are better off with ONE good card rather than two lesser cards.
    Reply to dontlistentome
  3. thanks guys
    Reply to Harel_Elisha1
  4. Best answer
    You can't Crossfire the RX 460 with anything other than an RX 460.

    As the newer RX 560 features a fully unlocked core with 1024 SP, I don't think you can Crossfire that with the RX 460 either.

    As for vram, when using Crossfire each cards vram (or frame buffer) stores effectively the same information - as they render alternate frames but 100% of that frame (known as AFR). So in terms of effective vram, one 2GB RX 460 + another 2GB RX 460 = 2GB effective vram.

    If you are running a game with DX12 m-GPU the game 'may' utilise split frame rendering (SFR), where one card renders (say) half of each frame and therefore you get approximately 4GB effective vram.

    Also with DX12 m-GPU you can mix and match Nvidia and AMD cards and models (although they must support DX12 and there are no guarantees of success either).

    But just because a game uses DX12 m-GPU it doesn't mean it automatically adopts SFR. I think Tomb Raider used AFR with DX12 m-GPU for example.

    My advice, as someone who owns a Crossfire rig... you are generally better off getting the best single card you can afford.

    If you do go down the Crossfire route (or Nvidia SLI route for that matter) make sure the games you play or plan to play support Crossfire/SLI/DX12 m-GPU.

    Using multiple GPUs is more agreeable if you are pairing two powerful cards together, as performance scaling is variable. Some games (DX12 m-GPU mainly) offer about 100% scaling, but they are the exception. I generally see about 60% to 70% on average. CPU overhead is also increased and system RAM requirements - so be aware of that. Ditto for power PSU requirements. Also make sure your motherboard is compatible. Don't worry if your board only supports Crossfire with PCIe in 8x mode. I run two cards in 8x mode and there is no noticeable performance hit even with the R9 Fury.

    If you find that a game you play doesn't support Crossfire/m-GPU, it's less of an issue if you are running powerful cards. So in your case running the RX 460 in Crossfire is not recommended. I'd consider the RX 470/570 as an absolute minimum. Ideally aim for RX 480/580 or above.
    Reply to BurgerandChips66
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