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[Success] GT640 10.10.5 Yosemite boot/scale/flicker solved

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Mar 23, 2016
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Motherboard
Dell 7020 SFF
CPU
i5-4590
Graphics
GT635
Mobile Phone
  1. iOS
Hi I just wanted to report my steps to success with a Geforce Gt 640 using Chimera and Yosemite 10.10.5. In my search to get this card working I found a lot of people just gave up and moved to a GTX 750 or something else that works OOB (not a bad thing) but I chose the GT 640 because the EVGA Superclocked edition is available cheap from their B Stock store, and should not be dismissed as being incompatible.

I could boot in safe mode and with the usb stick, but as soon as I tried to boot from a multibeast install with GraphicsEnabler=No (which is said to work with 6xx cards), the display would freeze either at a progress bar or simply a black screen with stuck cursor. HDMI cord/monitor power cycling did nothing.

Booting in safe mode got past the login screen, but the display would render in a series of 'wipes' or a scaling effect, and certain screen elements would flicker. 1080p videos were very poor.

The solution in a nutshell is to boot in safe mode, or with nv_disable=1, install web drivers, boot with nv_disable=1, activate web driver, and then finally reboot to test with web drivers only. Details below if you need more.

My specs:
HP 6000 pro MT, e8400
EVGA GT640 1gb Gddr5 SC
HDMI to Dell uz23something

Yosemite 10.10.5 14F27
The appropriate Nvidia web driver: 346.02.03f01

1. If you find yourself in an endless loop of reboot/blank screen/frozen status bar before getting to the login screen, boot with the '-x' safe boot flag. If not this, try 'nv_disable=1'
2. After you're logged in, find your OS X build by opening 'About this Mac', and clicking on 'Version 10.x.x', you will see the build number appear.
3. Go to
http://www.macvidcards.com/drivers.html and download the web driver that matches your build
4. Install the driver, and reboot as instructed. Boot with 'nv_disable=1'. Your video may be sluggish. The Nvidia driver manager should appear in the right menu bar, or in system prefs, go there and enable the 'NVIDIA Web Driver'.
5. I believe you are prompted to reboot one more time, with the new driver used for boot. If you boot in verbose mode, you will see just one Nvidia driver and your org.chameleon.Boot.plist should contain an entry for '
nvda_drv=1'
6. I'm a total noob so I had to look up how to test qi/ce: go test a screensaver! You should have a working Gt640 now!

ref:
http://www.tonymacx86.com/yosemite-desktop-support/145255-clover-using-nvidias-web-driver-install.html
http://www.macvidcards.com/drivers.html
 
Thank you. Your guide was helpful for my :)
 
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