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Author Topic: iMac MXM card upgrade. R270x/D300- I think it could be possible  (Read 2011 times)
FaDaWay
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« Reply #15 on: May 05, 2018, 09:56:26 AM »

Hi Rominator,
We can work on another card if you want.
I think that card 7970M or 8970M could be good candidates ?
Or perhaps GTX 980M ?

What card do you have in stock in LA.
I can order the same and work from France on it.

« Last Edit: May 05, 2018, 10:14:37 AM by FaDaWay » Logged
Rominator
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« Reply #16 on: May 06, 2018, 04:12:11 AM »

The AMD cards may be doable.

You need to compare how 7970 rom was made from 7950.

Only changed device id in rom header for EFI.

I just ordered some cool MXM to PCIE boards. Will allow me to flash and test in Mac Pro classic.

Ideally we should find lower power cards than the AMD cards that are burning themselves up.

So, a GTX660 would be nice replacement for 6750 or 6770. Something that releases less heat than card it replaces.

Also, I'm 90% sure I could write a working 660 rom since Apple put Kepler cards iMacs so EFI exists.
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FaDaWay
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« Reply #17 on: May 06, 2018, 09:28:29 AM »

I don't understand why I have to compare 7970 and 7950 it's because an EFI is available for 7950m ?


For the MXM to PCI did you bought the NVIDIA version or the AMD ?

https://www.ebay.com/itm/MXM3-to-PCIe-NVidia-Riser-Card-for-MXM-3-0b-3-1b-NVIDIA-GPUs-for-desktop-PCs/132503008933?hash=item1ed9cb76a5:g:OPYAAOSwIBxagepj

https://www.ebay.com/itm/MXM3-to-PCIe-AMD-Riser-Card-for-MXM3-based-AMD-GPUs-w-o-GPU/112812107426?hash=item1a442026a2:g:pDwAAOSwceNageeJ

GTX660 seems to be a good choice as replacement because of his price
but do you think that 980M could be also a good candidate, it's the same kind of GPU as the 6970M so the heat sink will certainly be used without any modification.
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FaDaWay
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« Reply #18 on: May 06, 2018, 10:16:07 PM »

I've found also this adapter for mining in China for less than 10$

https://item.taobao.com/item.htm?spm=a230r.1.14.89.70251735XwlXSp&id=567403942570&ns=1&abbucket=4#detail
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