Crossfire For Mac Pro

The AMD FirePro pair that ships in each 2013 Mac Pro is already physically CrossFired. On the other hand, the AMD GPUs in the Mac Pro towers require the CrossFire cable connecting the matching pair. The Windows AMD Catalyst Manager lets to enable and disable CrossFire mode without having to reboot. MORE ON CROSSFIRE The 'early 2008' Mac Pro makes using the Crossfire jumper easy since there are two side-by-side x16 PCie slots. The '2006/2007' Mac Pro only has one x16 slot. And the one next to it is an x1 slot. Unless you 'downgrade' slots 1 and 2 to x8 using the Expansion Slot Utility, Crossfire will be counter productive.

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Did you know your 2013 Mac Pro
has built-in CrossFire?
Posted Thursday, January 23rd, 2014 by rob-ART morgan, mad scientist
Did you know that if you boot Windows on your 2013 Mac Pro, you can run the dual GPUs in CrossFire mode? The OWC Lab ran some tests for us on a two new Mac Pros running Windows 8.1. For perspective and encourgement to legacy Mac Tower owners, we included results for a matching pair of AMD GPUs in our 2010 Mac Pro tower.
GRAPH LEGEND
nMP 6c D500*2 = 2013 Mac Pro 6-core with dual FirePro D500s 'CrossFired'
nMP 4c D300*2 = 2013 Mac Pro 4-core with dual FirePro D300s 'CrossFired'
MP 6c R9 270*2 = 2010 Mac Pro 6-core with dual ASUS R9 270s 'CrossFired'
nMP 6c D500*1 = 2013 Mac Pro 6-core with dual FirePro D500s 'UN-CrossFired'
nMP 4c D300*1 = 2013 Mac Pro 4-core with dual FirePro D300s 'UN-CrossFired'
MP 6c R9 270*1 = 2010 Mac Pro 6-core with dual ASUS R9 270s 'UN-CrossFired'
Diablo III -- 'Evil is in its prime.'
Our lonely traveler is on the path to adventure stopping occasionally to zap the undead. Settings are 2560x1440 Fullscreen, vSync OFF, High Quality, Anti Aliasing enabled. (LONGER bar indicates FASTEST in frames per second.)
World of Warcraft: Mists of Pandaria
'Narache Village Run' at 2560x1440, Ultra preset, 1X MSAA, Vsync Disabled. (LONGER bar indicates FASTER in Frames per Second.)
INSIGHTS
It should be clear from the graphs above that if you are a hard core gamer running Windows in your 2013 Mac Pro's Boot Camp partition, you can use the CrossFire mode to 'fuse' the dual FirePro GPUs so the game treats them as one really fast GPU.
The AMD FirePro pair that ships in each 2013 Mac Pro is already physically CrossFired. On the other hand, the AMD GPUs in the Mac Pro towers require the CrossFire cable connecting the matching pair. The Windows AMD Catalyst Manager lets to enable and disable CrossFire mode without having to reboot.
We chose a pair of AMD R9 270s for our tower experiment. They don't run under OS X -- yet -- but they were certainly 'pumped up' with CrossFire enabled.
Not all Windows apps benefit from CrossFire mode. We 'cherry picked' the two above to make our point. Also, in case you don't know it, CrossFire mode is not supported by OS X -- yet.
If you prefer to run your games under OS X, that's cool. But just be aware that only one GPU will be active -- unless the game developers decide to add the code to enable both of them.
This is my first torrent dont go hard on me;)This is what is contained in the readme file:.This will work on both newly installed and pre-installed versions of the software. Copy 'cbcrack.exe' to your Crazy Bump directory which is usually (C:Program Files (x86)Crazybump) on 64-bit systems or (C:Porgram FilesCrazybump) on 32-bit systems.Run 'cbcrack.exe' to start up your program, this will reset your trial every time you run it. This was a crack i found for crazybump on the bay of pirates ^.^ This torrent includes crazybump 1.2 and a crack for it.Enjoy.
As for legacy Mac Pro tower owners, if you have matching NVIDIA GPU, they don't support CrossFire. That's strictly an AMD thing. But they do support Scalable Link Interface (SLI) mode. Yet, the SLI jumper is not recognized on the Mac Pro tower even if you are running Windows. It does not support Virtualization Technology. Never fear. There is a utility called 'HyperSLI' that can enable Software Mode. It's not as good as Hardware Mode but is worth a try to squeeze out more FPS.
Comments? Suggestions? Email , mad scientist.
Follow me on Twitter @barefeats
WHERE TO BUY NVIDIA GPUs for your MAC PRO tower
The OS X compatible GeForce GTX Titan can be purchased from MacVidCards. They also offer a flashing and mod service for your existing GTX Titan for $200. MacVidCards recommends a supplemental power supply. We were able to run it in our 2010 Mac Pro without the aide of an auxiliary PS.
The OS X compatible GeForce GTX 780 is available from MacVidCards. They offer a flashing and mod service your existing GTX 780 for $200.
The OS X compatible GeForce GTX 770 (2G and 4G) is available from MacVidCards.
The EVGA GeForce GTX 680 Mac Edition can be ordered from EVGA direct or from Other World Computing (MacSales.com), Trans International (TransIntl.com), NewEgg, and Amazon.
The GeForce GTX 680 Classified 4G is available* from MacVidCards. (*out of stock as of this writing but watch for more to appear)
The GeForce GTX 680 4G is available from Mac*Pro.
The NVIDIA Quadro K5000 for Mac is available from OWC and Amazon.
The NVIDIA Quadro 4000 for Mac is available from OWC and Apple Store USA.
The Radeon HD 5770 and 5870 is available from OWC and Apple Store USA.
The Sapphire Radeon HD 7950 Mac Edition is available from OWC , TransIntl, and Amazon
A flashed Radeon HD 7970 running at PCIe 2.0 is available from MacVidCards.
WHERE TO BUY AN UP-CLOCKED 12-CORE MAC PRO TOWER
Visit EditBuilder.com's eBay Store. Or you can email them or call them (1-855-EDIT-BAY). They are offering both tray replacements as well as complete setups with 1-3 year warranties. They also offer up 128GB 1333MHZ RAM and graphics card upgrades for Mac Pro towers.
Also, check out Other World Computing's Processor Tray Upgrade Program.
Live in the UK? Visit ScrumpyMacs for 'fire breathing' Mac Pro options.
WHERE TO BUY NEW APPLE PRODUCTS
USA readers can help us earn a commission by using this Apple Store USA link or by clicking on any Apple display ad. For GPUs, click the left side bar option for 'For Mac > Displays & Graphics' to find the GPU kits available. Or if you are buying a new Mac Pro, you can choose GPU options when you configure your order. For UK readers, visit Apple Store UK.
WHERE TO BUY FACTORY REFURBISHED MACS
Apple Store USA has refurbished Macs with 12 month warranty that can be extended to 36 months with AppleCare. Pay attention to the GPU it comes with.
PowerMax not only sells new and used Macs, but will give you a generous trade-in offer on your old Mac.
Other World Computing has a Used Mac Store.
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copyright 2014 Rob Art Morgan
'BARE facts on Macintosh speed FEATS'
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Hi guys,
I'm wondering if you gentlemen can help with me getting Crossfire to work on my Mac pro (mid-2010) with two AMD 5770's. I have the two GPU's installed, 3gb of ram, windows 7 Enterprise x64 bit on Bootcamp, a Powercolor crossfire bridge (from newegg.com) and the latest Bootcamp drivers from AMD's website which can be found here:
http://support.amd.com/us/gpudownloa..camp-win7.aspx
After installing the 2nd card (in slot 2, each card slot is a pci-e x16 slot I believe) and booting into windows, I can log in fine, but launching the CCC and enabling Crossfire BSOD's my system. I can't figure out why. I only have one monitor (Samsung SyncMaster P2770 connected to the slot 1 gpu using DVI) and Device Manager sees both gpu's, and CCC reports both a primary gpu, and a disabled gpu, (i'm assuming because crossfire isn't enabled). If I reboot the system after the BSOD, it will load windows fine and I can log in, but as soon as the CCC tries to load in the system tray the system BSOD's again. I have had to boot into safe mode, prevent CCC from starting when windows starts, reboot the system and windows logs on fine. I can then manually launch CCC and see that crossfire is of course not checked off. CCC also warns, when enabling Crossfire, to keep the Catalyst A.I. in the Standard position due to application and display corruption issues. I have left mine in the Standard position.
I have also tried totally uninstalling all of CCC's components and used the windows CCC package dated 11/15 (v11.11) as of this posting, but that didn't work either (same results).
I was able to ask Apple over the phone whether Apple 'officially' supports Crossfire in a Bootcamp environment, otherwise I would be more than happy to either return the 2nd 5770 or use it as a back up if the primary one dies.
The tech did some research and emailed me a .pdf of Crossfire - but it was simply an explanation of what Crossfire was, no reference to it working in a Bootcamped system.
I've read other folks in a similar system setup (but not exactly like mine) have gotten crossfire to work but I can't seem to get it to.
What am I doing wrong?
Am I using the wrong bridge?
http://www.newegg.com/Product/Produc..color bridge
Any help would be appreciated. I hope everyone had a wonderful Thanksgiving
Philip

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Recommended; Processor (CPU) AMD Athlon™ 64 X2 Dual Core Processor 4600+ 2.4GHz Intel® Core™2 Duo Processor T6400 2.0GHz: AMD Ryzen™ 3 1200 Processor @ 3.1GHz (4 Cores), 3.4GHz.