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The NVIDIA GeForce 8800 GS board has 8 RAM chips in different locations to the ATI board's 4 RAM chips. So while the replacement NVIDIA GeForce 8800 GS board physically fits the space within the chassis and it physically fits into the video card slot, it DOES NOT fit the heat sink. Whether the replacement card functions as expected in that slot is something I'll have to provide advice on later. I assumed that this card would be a part of another successful “upgrade” project.ĭespite A LOT of advice to the contrary, my particular iMac has a video card slot that physically accepts both types of cards (the ATI or the NVIDIA).
#ATI VIDEO CARD FOR MAC PRO UPGRADE#
I successfully procured a replacement - the NVIDIA GeForce 8800 GS with 512 MB of VRAM - a BTO upgrade option for the original machine. (Refer to this iFixit Q&A "iMac Intel 24" EMC 21 Diagnostic LED's".) Recently the ATI Radeon video card expired… at least I used the four LEDs at the bottom edge of the machine to diagnose this as the issue. Many years ago I upgraded to 6GB RAM and installed a 2TB Seagate HDD with an SSD flash module (to mimic a “Fusion“ drive). My particular model shipped with the ATI Radeon HD 2600 PRO with 256MB of VRAM. My model is the entry level early 2008 24" iMac 2.8GHz processor, 2 GB RAM, 320 GB HD, SuperDrive, etc. I have read through the question and most of the answers and comments. I must acknowledge this iFixit Q&A "Can the graphics card of the 24" iMac be upgraded?".
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I'm not certain that this is the correct Stack Exchange forum for this question.