Blackmagic Forum

Just looking at building a hackintosh with a i7 6 core chip and a gtx680 4gb plus GUI card.

Anyone successfully using this for grading HD or better. What kind of performance can I expect?

Most of the heavy lifting is done by the GPU, anyway.

I have just a GTX 580 1535MB and a Core i7 980@ 3.33GHz 6 core - not exactly the latest model, but I get 25 fps if I don't throw a gazzillion nodes at it.

Hi
Thanks for your reply

Thats the issue - nodes.....Do you think with a 680 4gb and perhaps a 570 too I may get 25fps playback with a fair few nodes?

The reason you may want to go with the Sandybridge-e is PCI-e bus lanes. The CPU has 40 which means you can easily put in 2 16x GPU's and have 8 left over for a good input/output card

PTuser wrote:...Do you think with a 680 4gb and perhaps a 570 too I may get 25fps playback with a fair few nodes?

"Fair few nodes", whatever that may be. A node isn't a node, it depends how much you do in it.

I usually have a LUT, a corrector (where I do basic contrast), and maybe a tracked mask node. Whereby even different LUTs need different umph. So it is really hard to say, it depends.

If you have noise reduction going on, that needs some huge amount of GPU power.

But hey, you can always add more GPU cards.

Adbear wrote:The reason you may want to go with the Sandybridge-e is PCI-e bus lanes. The CPU has 40 which means you can easily put in 2 16x GPU's and have 8 left over for a good input/output card

It's actually got 48 lanes...40 on the PCI Bus and an additional 8 going to the controller chip.

I have built a Win 7 Resolve box using this CPU... 3930K kicks ass.

really appreciate this input as Im worried about going down this route and being disappointed in performance

traction wrote:

Adbear wrote:The reason you may want to go with the Sandybridge-e is PCI-e bus lanes. The CPU has 40 which means you can easily put in 2 16x GPU's and have 8 left over for a good input/output card

It's actually got 48 lanes...40 on the PCI Bus and an additional 8 going to the controller chip.

I have built a Win 7 Resolve box using this CPU... 3930K kicks ass.

I know, which is why I only said the CPU. The other 8 lanes have to be shared between everything else that goes through the controller chip such as networking, USB etc and I've found are more prone to conflicts when plugging in external devices