[Iain Forsyth]

I’ve been trying to get a PCIe Decklink Extreme card to work in a 64-bit Windows 7 PC for some time, and encountered similar problems to many of the posts. I tried dual booting, but this caused problems with a 4GB RAID(0) array failing and loss of data.

I was about to give up, but spotted a post about Hauppauge devices not working on 64-bit systems here: https://www.sevenforums.com/hardware-devices/46632-hauppauge-fix-how-do-i-limit-ram-win7-sees.html
The solution is down at the bottom of page one, and it also seems to work for my Decklink Extreme card by limiting the amount of memory that Windows 7 ‘sees’ without having to physically remove it.

– Start Windows Vista/7
– Enter the command msconfig into the search/run bar
– Click on the Boot tab
– Select Windows Vista/7 and open Advanced options..
– Check the box next to Maximum memory
– And enter a value lower than 4000 (MB) (3800 or lower recommended)
– Click twice on OK and restart Windows.

I set the Maximum memory to 3500MB for capture, and then back to 32000MB (ie the 32GB of physical RAM fitted) for editing/compositing.
The PC does need to be rebooted when the value is changed, but this is much safer than taking memory sticks in and out of the motherboard, and for me did not result in the dual boot problems.

I’ve not been able to get any drivers ver. 9 or above to work correctly, so I’m using ver. 8.1.0 which is OK for CS5.5

Hope this helps someone else!