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Re: GPU Ram for 4K projects, how much is enough?

COW Forums : DaVinci Resolve

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David Pirinelli
Re: GPU Ram for 4K projects, how much is enough?
on Apr 27, 2012 at 4:26:20 am

These cards I mod are being added to, nothing is really being lost.

We ADD a Mac EFI, but the PC BIOS remains.

In fact, the cards can reboot into Windows whenever you want.

Even better, if you use your Mac to boot into Windows via Bootcamp, the PCIE fix goes there too. Currently if you boot into Windows with a PC only BIOS, you will have the same PCIE 1.0 2.5 GT/s issue that exists in OSX. FWIW, flashed ATI/AMD cards have same issue. Apple must have left this little trap to keep flashed cards "inferior" to official Apple ones. The PCIE 2.0 switch is a separate part of ROM that has been fiddled with by Apple for this purpose.

So our cards GAIN Mac EFI and retain PC BIOS. It is this "Dual ROM" that requires a new EEPROM chip as the space necessary is never available on retail cards.

So the cards are truly cross platform once the mod is done.

The ONLY exception is with the multi outlet cards. These are BIOS modded to enable only 2 outputs. For the Dual DVI cards, both DVI ports will work, though HDMI will likely NOT work.

For the Dual DVI, HDMI and DIsplayPort cards, 1 @ DVI and the DIsplayport are the only ports working. TO enable all 4 again will require ref lashing with PC BIOS. THis is a result of how Mac OSX Nvidia drivers work. Note that on the PC Quadro 4800 and Quadro 4000 compared to the Mac ones, they REMOVE a port. The PCB still has the traces, they just don't place the port in . This is why I am very curious to see how the GTX680 drivers will work.

In any case, our new GTX5xx cards work quite well in Windows as well as OSX. If you ever need to use ALL of the ports in Windows, you can ref lash the card in Windows.

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