GTX 780 w/ Dedicated PhysX. Advice Please.

[Dark360]

I am upgrading from a 660ti to a 780 next week and am going to use the 660ti as a Dedicated PhysX card.

I was wondering 2 things about this:

1: I have a 660ti, 570HD and 550ti available and was wondering which one would be the most efficient as a dedicated PhysX card. I understand that using a lesser card alongside a 780 can bottleneck rather than increase performance where PhysX is used.

2: I have an Antec 850 Quattro PSU and was wondering, should I use both 6+2 pin connectors on the 780 or use one 6+2 pin and one 6 pin connector? I understand that the 6+2 pin connectors have their own 12V Rail, where as the 6 pin connectors don't.

Any advice will be appreciated.

[Listy2021]

Sell the 660ti, 570HD, and 550Ti and forget about dedicated PhysX, that ship sailed long ago with Ageia

[KeyboardDemon]

I would think about what games you are playing at the moment and how many of them use Physx.

If you find that only one or two of those games are making use of Physx then holding on to a card that you could sell for that performance gain in a very limited number of games might not be a worthwhile exercise.

If on the other hand, you are only playing Physx games then it would be worth considering, but like Listy2021 I would be inclinded to say sell the GPUs and think about putting that money towards a second GTX780 and then running them in SLI, your 850watt PSU will be able to cope with this and you will see performance gains in all games that you play rather than just a handful of Physx titles.

[Dark360]

Thanks.

I should have added that i only have access to one of the three as they have other purposes, so selling is out of the picture.

[Gareth@scan]

I personally would stick with a GTX 780 and leave a Physx card out! and maybe get a second 780 for SLI in the future

[Pob255]

The first thing you should do is some testing.

Have you got batman arkham asylum? that's a good game with physx test, it's got a benchmark/test you can run, if you don't have it then I believe the free demo also includes the test.

test the 780 on it's own, then you can try adding the other cards and seeing if it has an effect.

[KeyboardDemon]

The first thing you should do is some testing.

Have you got batman arkham asylum? that's a good game with physx test, it's got a benchmark/test you can run, if you don't have it then I believe the free demo also includes the test.

test the 780 on it's own, then you can try adding the other cards and seeing if it has an effect.

This is a good idea, but Batman Arkham Asylum is not a good game to test it with, there's an issue with the card detection that for some reason caused my PC to crash when I wanted to run PhysX, it was reporting that my GPU did not meet the minimum requirements for this game and I am using a GTX780, here's an example of the issues people were having with this game. Also they have removed the integrated benchmark from Arkham Asylum GOTY edition, but both Arkham City and Origins have the benchmark and run Physx with no issues.

Try and test it with one of these games, not all of them have built benchmark tests but you will get a feel for how well the game performs with and without Physx before you compare it to running Physx with an additional card, also aim at using a DX11 game with more Physx features over a DX9/10 with fewer features being implemented.

[Pob255]

Ahh yes sorry I meant batman origins, just getting them mixed up as to which was the latest