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HOWTO: Any 8800 in old Mac Pro! [Windows]

Cindori

Cindori

macrumors 68040
Original poster
Jan 17, 2008
3,528
378
Sweden
This was edited 2009/06/12 to only include instructions for powering a graphic card from the second superdrive.



Anyway, here is what you need.

1x split molex(?) cable, available in pretty much any computer store
http://www2.multithread.co.uk/mtcsh...cts/Power_Splitter_Cable_-_2_x_Molex_main.jpg


2x of these cables, that comes with your card
http://www.com-tra.de/img/p/06759_o.jpg



What we are going to do is taking power from the DVD-ROM unit. It will not affect the performance of it, and the card will have enough power.

EDIT: my images got deleted, here are another users:

https://forums.macrumors.com/posts/7397574/
 
i know you put some time into this write-up, but it's ultimately useless because:

-everyone already knows you can use PC graphics cards in a mac pro under windows
-no one wants to switch graphics cards every time they change the OS
It will only work in Windows, at the moment. Perhaps we can flash these cards to work in OSX when the 8800 for Mac is shipping to some MacHackers : )
Click to expand...
these PC cards will never be flashable to OS X compatibility because they don't use EFI.
 
aibo said:
these PC cards will never be flashable to OS X compatibility because they don't use EFI.
Click to expand...

Actually that is not true really. PCs with EFI style motherboards can run standard PC graphics cards. The only requirement for EFI is in the specific Mac ROM which is what you are flashing to the card anyway.
 
Hm yeah the point of flashing is giving them EFI rom :)


I just hope it will work with GTX... xD


And maybe everyone knows that, I just thought id make a simple guide that doesnt require any special orders etc :cool:


Also, I forgot. If you got a NEW Mac pro, you will have 2 x 16 slots. Therefore put your radeon 2600 or gf 7300 or whatever in slot1, and a monster card like this in slot2. You can then boot OSX will no problem and you can use the monster card fully as there will be drivers out in a few days.
 
Mac Pro 8800

Thank-you for that guide - I should hope that Apple have a slightly 'cleaner' approach to the extra power cable, but it was a nice read. Thanks for taking the time to make this :)

F
 
I have to agree with aibo here. There have been threads since the Mac Pro's launch about putting the 8800 Series into the Mac Pro under Windows.

Any chance you can avoid that cable mess with this?
 
:D!


Ye with apples 8800 you will get a cable to hook it up on the motherboard.

But there is always a kick from doing it the hard way : )



Eido: as I said,

"anyway here is a update on how you can provide power supply to the card + closing the side door without having to buy a special cable for 30$ like some ppl have"

and if you look at my update reply I dont think it's messy :p
 
Cindori said:
:D!


Ye with apples 8800 you will get a cable to hook it up on the motherboard.

But there is always a kick from doing it the hard way : )


Eido: as I said,

"anyway here is a update on how you can provide power supply to the card + closing the side door without having to buy a special cable for 30$ like some ppl have"

and if you look at my update reply I dont think it's messy :p
Click to expand...
Please make a MacRumors guide then. I believe it's well worth the $30 in order not to have a cable mess trying to use molex cables for power, a second computer, or an external power supply.
 
aibo said:
i know you put some time into this write-up, but it's ultimately useless because:

-everyone already knows you can use PC graphics cards in a mac pro under windows
-no one wants to switch graphics cards every time they change the OS

these PC cards will never be flashable to OS X compatibility because they don't use EFI.
Click to expand...

Dude don't be a Killjoy... I wanted to use a worse word word but I'm nice.

DONT fault the GUY for POSTING this is GREAT INFO. Not Evryone wants to do what you want. Dont be selfish
 
slackpacker said:
Dude don't be a Killjoy... I wanted to use a worse word word but I'm nice.

DONT fault the GUY for POSTING this is GREAT INFO. Not Evryone wants to do what you want. Dont be selfish
Click to expand...
whatever dude. if you need a writeup and illustrated guide on how to plug in a molex splitter, i don't know what to say. i'm baffled at how this is "great info" to you.
 
Does anyone have copies of the pictures on how to power the GPU from the secondary DVD drive?


Right now I can't flash my card because I don't have enough power! I don't have another computer to use it in beside my 1,1 mac pro :(

Any help would be appreciated!

EDIT: I wasn't able to get enough slack to get the cable through so I had to do it frankenstein style with the case open. In case anyone is curious (I did not know this at first). Just unlock the latch on the case and you can pull the Optical bays right out! Then the cables are a snap to find... unless you are blind.
 
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