This unfortunately reduces ventilation and blocks PCie slot #3. Therefore to optimize performance from GPUs in Mac Pros 3,1 // 4,1 // 5,1 both GPUs need to be in the bottom two slots (PCIe slots #1 and #2). In the 2008 model the top two x4 slots are further reduced to PCIe revision 1 speeds. The top two slots (#3 & #4) will only run at x4 lanes.
Old mac pro video cards full#
The only drawback here is the loss of Drive Bays #3 and #4 to make room for the double width 5770 on the top in PCIe slot 4.įor 2008-2012 (Mac Pro 3,1 // 4,1 // 5,1): Unfortunately only Slots 1 and 2 can run at full speed and and use x16 lanes of the PCIe bus. This will use the two fastest PCIe lane combinations (x16 in slot1 and x8 in slot 4), and allow for increased ventilation, as well as leaving slots 2 and 3 open for other add-on cards.
Old mac pro video cards install#
I notice in my istat menu results (GFX-cards.jpg)įor 2006 & 2007 models (Mac Pro 1,1 & 2,1): The best approach will be to use tpayton's method to install one 5770 in slot 1 (the bottommost slot that accommodates a double width PCIe card), and the second 5770 in Slot 4. Which made me more concerned about this test. but I am a bit concerned about the power? I am waiting for 2x power cable splitters.Ĭoncerned this will draw power from the motherboard and maybe fry it?but I should probably get a dedicated power supply? any suggestions appreciated.įrom what I have read, slot 1 and 2 are more powerful at 12lanes and 3+4 are at 4 lanes? I would like to install 2x 7950 cards to do a BruceX test. Did Mavericks solve that?įrom another thread I created - before I saw this one. You can choose your MPX Modules when you order your Mac Pro or order them separately from Apple. Another concern I have.or maybe not., FCPX/Motion is the only app that supports 'dual'.what will having 'dual' do to my other apps? Some setups can cause major headaches! Trial and error I suppose.į/showthread.php?t=1583723Ĭurious: Having dual GPU's was a big stability NO NO before on the tower. The Mac Pro introduced in 2019 has eight PCIe slots: Four double-wide slots Three single-wide slots One half-length slot preconfigured with the Apple I/O card Mac Pro includes one or two Radeon Pro MPX Modules that occupy slots 1-2 and slots 3-4.
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