iM 4,1-14,4 2011 iMac Graphics Card Upgrade

[Uranga]

hello there. I have a question. Im trying to revive a mid 2011 27" imac with the AMD Radeon 6970M 1gb. At first i though it was a hardrive failure, but i replaced it with an SSD and doesn't go past the internet recovery. When i try to put an USB mac os Sierra, i get the blue screen so i figured is a dead GPU. Being that this thread is at 889 pages, Ha. i figured i ask, It does seem like a GPU failure right?

Also aret here are Any, i mean any plug n play cards i can get? i don't want to make any heatsink mods. i don't want to invest too much, as i can get a whole used machine for $120. Thank you all. so im willing to buy the same OEM gpu.

 

[howardc64]

hello there. I have a question. Im trying to revive a mid 2011 27" imac with the AMD Radeon 6970M 1gb. At first i though it was a hardrive failure, but i replaced it with an SSD and doesn't go past the internet recovery. When i try to put an USB mac os Sierra, i get the blue screen so i figured is a dead GPU. Being that this thread is at 889 pages, Ha. i figured i ask, It does seem like a GPU failure right?

Likely dead GPU.

Also aret here are Any, i mean any plug n play cards i can get? i don't want to make any heatsink mods. i don't want to invest too much, as i can get a whole used machine for $120. Thank you all. so im willing to buy the same OEM gpu.

Look on ebay for used working 6970M prices and depends where you live.

If upgrade to metal GPU, need to learn VBIOS flash, OCLP installation (both are software only) and potentially copper shim of the right thickness. Probably don't need to grind heatsink choosing MXMA (smaller) cards. Kepler (K610m/K1100m) is your cheapest option at somewhat lower performance on some key features (compare using techpowerup.com) than 6970M. Info in my signature link.