XFX Radeon HD 5770 with Mac Pro 1,1?

[theJTL]

First time poster, long time lurker.

I just picked up a 2006 Mac Pro 1,1 last week for a great price ($150!!) it's fully functional and updated to 10.7.5, 16GB RAM, 2x2.66 quad.

I got it planning to upgrade to Yos. or Cap. so I could run Logic Pro X, etc in my home studio workspace. Bought an XFX HD 5770 from eBay, the seller claimed it worked with Mac, but I should have been wary when he said he only had a molex to 6 pin connector.

Got the card today and have tried just about everything I could think of to test it's viability to no avail. I tried both DVI ports, DVI to VGA, even HDMI...not a flicker.

I'v spent the past couple hours coming the boards and haven't been able to find anything definitive re: whether it will work or not. But at this point I'm thinking no. Posting this thread as a last hope. I've contacted the seller about a return, but nothing yet.

Any one use this card successfully? The price was right compared to the others on offer and I jumped at it, this being my forst go-round with Mac Pro, although I'm a mac user since the early 90s and pretty handy with computers in general.

Thanks in advance.

 

[ColdCase]

Dunno but a 5870 works fine in a 3,1 MacPro.

 

[NZXTInerTia]

Well, are you using the six pin connector? You do know you have to run an Apple Specific six pin logic board connector, to the six pin PCI connector on the GPU.

 

[theJTL]

Well, are you using the six pin connector? You do know you have to run an Apple Specific six pin logic board connector, to the six pin PCI connector on the GPU.

I'm using the 6 pin that the previous GPU was connected with.

 

[NZXTInerTia]

I'm using the 6 pin that the previous GPU was connected with.

I'm not sure how PC cards work on the older OS X versions, I know I'm running a GTS450 in my El Capitan loaded 1,1 and it works flawlessly.

As a side note, the 5770 is really a nice card. I had them in triple crossfire in my old, old PC build.

 

[theJTL]

Update: I couldn't get the HD 57700 to pass video on a PC either. So I shipped it back and paid for an original mac pro version. Cheapest I could get was $150. Paid $70 for the PC version.

 

[NZXTInerTia]

Update: I couldn't get the HD 57700 to pass video on a PC either. So I shipped it back and paid for an original mac pro version. Cheapest I could get was $150. Paid $70 for the PC version.

Bummer, hopefully my PC HD5870 ends up working! Wish you luck, and curious to hear how the reference Apple HD5770 works for yah.

 

[Mac Pro Convert]

I am running an MP 1,1 at the moment with Dual Genuine Mac Edition 1 Gig Radeon HD 5870's
with both cross fire bridges connected.

If you use a DVI to VGA adaptor and run your monitor in VGA mode you will get the boot screen,
I even tried ReFind in DVI mode still no boot screen,
you must run monitor in VGA Mode with the adaptor to get boot screen
with the HD 5870 in MP 1,1.

I have no idea if the flashed PC version of the HD 5870 will work or not.

Apart from having to run both cards at X8,
the only issue I am having is boot camp windows
will not boot with both cards installed.

If I take the second card out windows will boot.

 

[h9826790]

I am running an MP 1,1 at the moment with Dual Genuine Mac Edition 1 Gig Radeon HD 5870's
with both cross fire bridges connected.

If you use a DVI to VGA adaptor and run your monitor in VGA mode you will get the boot screen,
I even tried ReFind in DVI mode still no boot screen,
you must run monitor in VGA Mode with the adaptor to get boot screen
with the HD 5870 in MP 1,1.

I have no idea if the flashed PC version of the HD 5870 will work or not.

Apart from having to run both cards at X8,
the only issue I am having is boot camp windows
will not boot with both cards installed.

If I take the second card out windows will boot.

Disable crossfire may help. Mac EFI and crossfire doesn't like each other.

 

[Mac Pro Convert]

Disable crossfire may help. Mac EFI and crossfire doesn't like each other.

already tried that as well as removing both the bridge cables,
windows just wont boot with both cards installed.

However My MP 3,1 will boot windows with both cards
and both bridge cables installed,
Guess its an architecture thing,
Mp 3,1 has a newer PCIe bus so windows will run both cards and both at X16.

The HD 5870's came out of my MP 3,1 when I upgraded it
to a Flashed 2Gig Nvidia GTX 770

 

[MIKX]

I flashed an XFX HD 5770 ( and a Sapphire Vapor-X HD 5870 ) for EFI bootscreens.

Have a look at post #213 here on the Netkas forums http://forum.netkas.org/index.php/topic,10827.msg32384.html#msg32384

Whatever vid cables you use don't forget to also change the monior INPUT settings too. So many people forget this

( The pic below if from my old cMP 2,1. I have a flashed 5,1 now. )

 

[MrMoodle]

Well, are you using the six pin connector? You do know you have to run an Apple Specific six pin logic board connector, to the six pin PCI connector on the GPU.

Oh! I'm having the same problem as the OP, and had a 6-pin to 6-pin male PCIe cable I bought online a while back (had no idea if it was PC or mac), and hooked it up thinking it'd work. You're saying that it has to be a mac-specific PCIe cable? Is this because the pin layout is different depending on manufacturer? It is getting power to it the 5770, as there's a clear difference in sound/fan when the cable is plugged in vs when it's not...

What's also weird is that my mac is detecting a graphics card in the slot, but it's not reading the info/model from it, like it does with my old card. But no signal going out from any of the ports.

EDIT: I talked to an expert at the apple.com discussion forum, and he said as long as it's 6-pin mini to 6-pin (it was), and it fits, it will work. That there's not a compatibility problem as long as it's the right # of pins and it fits.