Stepping up to a P4000 puts you right back to where another gaming card is about the same thing. The P4000 has 1792 cuda cores, the GTX 1070 has 1920. Roughly the same card speed wise. And use the same GP104 gpu

If you really want to increase render speeds, the GTX 1080ti is a monster. 3584 cuda cores, which is more cores than what the P5000 has.

Cuda core count is one of the main considerations in rendering, so is GPU memory. Then there are the other things like slots available and size, power available, etc.

If your dead set on a quadro there is nothing wrong with that. You can find them for a good deal. But at the same time Quadro's have never been the fastest cards. Sure they have longer driver cycles than the gaming cards, most of the are single slot, etc. But they are not the fastest cards out there. They are production cards designed to be stable, better fan life, etc, with certified drivers specifically for high end applications. And they are usually clocked far slower than gaming cards as well, that use the exact same GPU chip....

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