10.11 DP: installer not loading, GTX 960

I followed the guide [1] to create an usb stick to install the developer preview (beta 1) of el capitan. The stick works fine and everything loads properly without an error, however the graphical installer never shows up. Any idea?

The last (relevant) messages say: IOGraphics flags 0x43 NVDAStartup: Official

No DSMOS messages as with Yosemite.

I tried with nv_disable=1 and nvda_drv=1 as well as leave it enabled.

Any idea?

[1] http://www.tonymacx86.com/el-capitan-desktop-support/167901-how-create-os-x-el-capitan-public-beta-installation-usb-using-clover.html

submitted by Phlogi
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What is missing? Please comment to help!

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