I am having problems with my GPU, I do not want to buy a new iMac if can be fixed and even better upgraded. I know I can try to find the same, except GPU, but I want to know if I can get more than 512MB on video, making opening my iMac worth it? BTW, mine is iMac 2.7ghz 27 inches with 512 video card.
Hi Dan,
Thank you again, I do not know if I could attach the image well, I try answering but I do not know where it goes, so I edit my question adding this image and looks fin on my computer.
That time that screen was like in the picture, the computer after few seconds reboot and start again. the next time was black screen and I have to shut down by pressing the start button for few seconds.
I am pretty sure I am able to turn on my computer again but i want to keep it alive until i found the proper solution or replacement.
Looks like I will need to get the tools to open my iMac and learn how to do it, anyway is not working, so is a good excuse to try to fix it. Its a shame because the screen is really good, those 27 inches are great for my eyes and for editing.
The Radeon HD 6770M Mac Edition was a mobile graphics chip by AMD, launched in January 2011. Built on the 40 nm process, and based on the Whistler graphics processor, in its Whistler XT variant, the chip supports DirectX 11.2. The Whistler graphics processor is an average sized chip with a die area of 104 mm² and 716 million transistors.
I know is an old computer and until last year I was very happy with it. so I hope you can see the photo and might be give you a clue what can I do.
Thank you so much.
Is this a good question?
Is there a driver update for AMD Radeon HD 6770M following upgrade to OSX High Sierra to address the GPU performance issue users are seeing?
From the point I upgraded to OSX High Sierra it was clear that the GPU was struggling - AMD Radeon HD 6770M 512MB. It coincided exactly with the upgrade. I see other posts on other sites indicating the same behaviour. On previous upgrades where this has happened Apple updated the firmware fro the GPU's - are there any plans to do this in this occasion.
iMac (21.5-inch, Mid 2011)
2.7 GHz Intel Core i5
AMD Radeon HD 6770M 512 MB
iMac (21.5-inch Mid 2011), macOS High Sierra (10.13.1), AMD Radeon HD 6770M 512 MB
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