Resolume Forum

This shows some good info regarding the new 2015 15" with the R9. I am in the market myself for a new machine but I am not a fan of my current AMD in my MBP. They run too hot. If anything, maybe the new 5k iMac with the upgraded gpu.

http://forums.macrumors.com/showthread.php?t=1884846

And

http ...

Model: Macbook Pro (early 2011)
Operating System: 10.10.3
Graphic card: AMD Radeon HD 6750M (1gb ram)
Harddisk: Samsung 840 Pro
Processor: 2.2 GHz Intel Quad Core i7
Memory: 16 GB
Resolume: 4.2

Output Setup: Control Display @ 1440x900 and 1 Out Via mini-DP @ 1080p

Benchmarks for 1080p
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