Trying to flash the Gigabyte GTX 750ti 4GB Card - Which EFI do I get?

Vaughn Goodsen

macrumors newbie
Original poster
Feb 9, 2016
1
0
So I bought a Gigabyte GTX 750ti (GV-N75TWF2OC-4GI) Amazon

I installed the web drivers on my mac pro, installed the card, and rebooted the computer and it worked. I thought everything was fine until I tried to use boot camp. In order to switch hard drives I need access to the boot screen, so I decided to try to find an EFI for the card.

I found a few Gigabyte GTX 750ti EFI's on this website's database, but unfortunately they are all 2GB versions. So my question is: Can I use a 2GB GTX 750ti EFI, or does the EFI have to be for the 2GB card. Will the memory auto adjust once I load the OS? Will the card even work if I flash it with an EFI made for the 2GB version?

Here is the file I was trying to use: This or This

But here is the full list of available EFI's: http://www.techpowerup.com/vgabios/...model=GTX+750+Ti&interface=&memType=&memSize=
 

h9826790

macrumors G5
Apr 3, 2014
13,951
6,578
Hong Kong
AFAIK, There is no Mac EFI (not UEFI) for 750Ti for self flash yet, you must send it to professional like MVC to do it for you.

Anyway, you can select start up disk in system preferences in OSX (and within Bootcamp apps in Windows), no need the boot screen.
 
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turbineseaplane

macrumors 603
Mar 19, 2008
6,033
8,968
AFAIK, There is no Mac EFI (not UEFI) for 750Ti for self flash yet, you must send it to professional like MVC to do it for you.

Anyway, you can select start up disk in system preferences in OSX (and within Bootcamp apps in Windows), no need the boot screen.
So you can take, say a normal non flashed 980ti, and it will work fine on both sides and you just use the Bootcamp startup disk selectors to go back and forth?

No flashing really "needed"?
 
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scott.n

macrumors 6502
Dec 17, 2010
337
78
So you can take, say a normal non flashed 980ti, and it will work fine on both sides and you just use the Bootcamp startup disk selectors to go back and forth?

No flashing really "needed"?
Yes, it will work fine on both sides (with the usual caveats re: Maxwell cards in OS X).
 
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Beagl3

macrumors newbie
Jan 2, 2016
19
4
Germany
The only limitation will be the PCIe Bandwith using Bootcamp. The Mac EFI won't be able to recognize the GPU BIOS so it will trade out the lowest PCIe Bandwith (PCIe 1.1 instead of 2.0) The Nvidia Web Driver using OS X bypasses that problem in some way.
 
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turbineseaplane

macrumors 603
Mar 19, 2008
6,033
8,968
The only limitation will be the PCIe Bandwith using Bootcamp. The Mac EFI won't be able to recognize the GPU BIOS so it will trade out the lowest PCIe Bandwith (PCIe 1.1 instead of 2.0) The Nvidia Web Driver using OS X bypasses that problem in some way.
Ahh - that sounds like a drawback that makes flashing worth it
 
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ActionableMango

macrumors G3
Sep 21, 2010
9,510
6,750
So you can take, say a normal non flashed 980ti, and it will work fine on both sides and you just use the Bootcamp startup disk selectors to go back and forth?

No flashing really "needed"?
It will work for the most part, but there is a whole list of caveats which may or may not be important to you.
 
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Beagl3

macrumors newbie
Jan 2, 2016
19
4
Germany
Maybe. A GTX 750 Ti isn't a beast of a GPU, so the limitations wont't be more than measurable. Even a GTX 980 loses just about 5% of its overall performance if it has to use PCIe 1.1. But when it comes to DirectX 12 Performance, the PCIe drawback may be noticable. Under PCIe 1.1, the score of the DirectX12 draw call benachmark provided by FutureMark is not even the half of the score it should be with PCIe 2.0. The reult of DirectX11 draw call benchmark is fine with my GTX 970.
 
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h9826790

macrumors G5
Apr 3, 2014
13,951
6,578
Hong Kong
thankyou but i didn't find it on my bootcamp
Did you really install Windows by bootcamp? Or install the Bootcamp driver / apps after your own Windows installation?

That apps is from Apple, and only can be downloaded inside the MacOS Bootcamp assistant. That's a large set of files including all drivers and this apps.

If you install Windows via Bootcamp assiatant. The installer should run automatically after Windows installation complete. However, if you install Windows by yourself, you must manually run the installer, otherwise that apps won't come out from nowhere. It's not a part of Windows, but a 3rd party apps (to MS).
 
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