Hd 4850 For Mac LINK
I read that Apple are replacing the AMD Radeon HD 6970 graphic card in the later 2011 iMac free of charge because of problems, is this a good choice to upgrade my dead 4850 graphic card in 2009 EMC 2309 iMac or is there an alternative? Any help much appreciated!
Hd 4850 For Mac
Comparative analysis of AMD Radeon HD 6770M and ATI Mobility Radeon HD 4850 Mac Edition videocards for all known characteristics in the following categories: Essentials, Technical info, Video outputs and ports, Compatibility, dimensions and requirements, API support, Memory. Benchmark videocards performance analysis: PassMark - G3D Mark, PassMark - G2D Mark, Geekbench - OpenCL, CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s), GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - Manhattan (Fps), GFXBench 4.0 - T-Rex (Fps), 3DMark Fire Strike - Graphics Score.
I'm having the exact same issue you describe. I'm on an iMac 27 with radeon 4850 GPU, only difference is mines the 2011 model. The crazy part is I've actually tried Arch Linux, Debian (testing and stable), and Ubuntu and got the same result. That Debian stable is using a 3.2 kernel and still wont boot correctly is baffling.
I had the exactly same issue last weekend when I tried to install Arch on my late 2009 iMac with ATI 4850 512MB graphical card. After hours of work, I still not able to boot into graphical interface by the exactly same methods used by OP. I did some research that someone saying the perpoitery Catalyst driver may work. However, the HD2.3.4xxx series are no longer supported by the latest catalyst driver and had to choose the legacy driver at AUR. The legacy driver requires kernel version older than 3.19 and xorg-server version older than 1,13, and also some other dependencies. It is worth trying, but I won't have a try on it any more, I've spent too much time on that. Let me know if that method will work.
The screenshot below from Flickr user Andrew Durdin (used with permission) illustrates Portal performance improvements by comparing them between Windows 7 and Mac OS X before and after the Snow Leopard Graphics Update. Durdin saw frame rates either double or triple while running Portal at 2560 by 1440 resolution with high quality settings on a 27-inch 2.66GHz quad-core Core i5 iMac with a 512MB ATI Radeon HD 4850. The resulting frame rates are much, much closer to performance parity with the Windows version, and well within respectable, playable thresholds.
I have the ATI Radeon HD 4850 graphics processor with 512MB of GDDR3 memory installed on an i5 iMac 27inch setup. Given that my current card is malfunctioning and that versions of that card are prohibitively expensive, which cards could I theoretically upgrade to?
I'm running X-Plane 11.00pb11 In OS X 10.12.3 on a late 2009 27" iMac, 2.8 GHz Intel Core i7, 8GB RAM, ATI Radeon HD 4850 512 MB. Bearing in mind I've got the Rendering options set to "Low" I can take off, fly and land quite happily in the default craft.