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All Gpu card for the iMac 2011 is mxm standard 3.0. So the 27'' 6970m mxm card is longer than the 27'' 6770 mxm card which seem to be the same module than in the 21,5''. I'm pretty sure than the 6970m could work in 21,5'' if you put the 21,5" 6770 heatsink on it. Aslo, to fit the 6970m into the 21,5" you must cut the half the hd retaining holder from the imac inner frame. The 6970m mxm module is one inch taller than the 6770 one.
All Gpu card for the iMac 2011 is mxm standard 3.0. So the 27'' 6970m mxm card is longer than the 27'' 6770 mxm card which seem to be the same module than in the 21,5''. I'm pretty sure than the 6970m could work in 21,5'' if you put the 21,5" 6770 heatsink on it. Aslo, to fit the 6970m into the 21,5" you must cut the half the hd retaining holder from the imac inner frame. The 6970m mxm module is one inch taller than the 6770 one.
 
Also, you miust remove a part of the iMac inner frame rib which retain the hd with a dremel tool. The 6970m is like one inch longer than the 6770 module and this will make the 6970m card to interfer with the main hd. Changing the main hd for a SSD attached with two sided foam tape in the bottom if the iMac will correct this problem with the inner frame modification.
Also, you miust remove a part of the iMac inner frame rib which retain the hd with a dremel tool. The 6970m is like one inch longer than the 6770 module and this will make the 6970m card to interfer with the main hd. Changing the main hd for a SSD attached with two sided foam tape in the bottom if the iMac will correct this problem with the inner frame modification.
 
Use the original heatsink gpu temp sensor to test if the machine work properly once reassembled.
 
It cost the 6970m module 661-5968 (380-499$) plus SSD. Install SSDfancontrol to avoid hd fan blowing at full speed.
It cost the 6970m module 661-5968 (380-499$) plus SSD. Install SSDfancontrol to avoid hd fan blowing at full speed.

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编辑: ricomac ,

文本:

All Gpu card for the iMac 2011 is mxm standard 3.0. So the 27'' 6970m mxm card is longer than the 27'' 6770 mxm card which seem to be the same module than in the 21,5''. I'm pretty sure than the 6970m could work in 21,5'' if you put the 21,5" 6770 heatsink on it. Aslo, to fit the 6970m into the 21,5" you must cut the half the hd retaining holder from the imac inner frame. The 6970m mxm module is one inch taller than the 6770 one.

Also, you miust remove a part of the iMac inner frame rib which retain the hd with a dremel tool. The 6970m is like one inch longer than the 6770 module and this will make the 6970m card to interfer with the main hd. Changing the main hd for a SSD attached with two sided foam tape in the bottom if the iMac will correct this problem with the inner frame modification.

Use the original heatsink gpu temp sensor to test if the machine work properly once reassembled.

It cost the 6970m module 661-5968 (380-499$) plus SSD.
All Gpu card for the iMac 2011 is mxm standard 3.0. So the 27'' 6970m mxm card is longer than the 27'' 6770 mxm card which seem to be the same module than in the 21,5''. I'm pretty sure than the 6970m could work in 21,5'' if you put the 21,5" 6770 heatsink on it. Aslo, to fit the 6970m into the 21,5" you must cut the half the hd retaining holder from the imac inner frame. The 6970m mxm module is one inch taller than the 6770 one.

Also, you miust remove a part of the iMac inner frame rib which retain the hd with a dremel tool. The 6970m is like one inch longer than the 6770 module and this will make the 6970m card to interfer with the main hd. Changing the main hd for a SSD attached with two sided foam tape in the bottom if the iMac will correct this problem with the inner frame modification.

Use the original heatsink gpu temp sensor to test if the machine work properly once reassembled.

It cost the 6970m module 661-5968 (380-499$) plus SSD.

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原帖由: ricomac ,

文本:

All Gpu card for the iMac 2011 is mxm standard 3.0. So the 27'' 6970m mxm card is longer than the 27'' 6770 mxm card which seem to be the same module than in the 21,5''. I'm pretty sure than the 6970m could work in 21,5'' if you put the 21,5" 6770 heatsink on it. Aslo, to fit the 6970m into the 21,5" you must cut the half the hd retaining holder from the imac inner frame. The 6970m mxm module is one inch taller than the 6770 one.

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