El Cap looks pretty interesting and the introduction of Metal could mean also quite a boost for desktop applications. So what GPU you will need ? According to the Apple devs (page 84)
All Macs since 2012
will be blessed with Metal-support. That would be earliest according to the list of GPUs from Apple:
- Intel HD 4000 from Mac mini (Mid 2012) or MacBook Air (Mid 2012)
- ATI Radeon HD 5770 from Mac Pro (Mid 2012)
- NVIDIA GeForce GT 640M (aka: GK107 N13P-LP) from iMac (21-inch, Late 2012)
netkas.org also has a list of supported GPUs according to the current drivers of DP1.
Let’s see …
OS Xeon 