I  will ship to you as cheap as possible and only charge you for  freight required, and ship out of Saskatchewan . Do not freak out about the freight pricing as it it just an estimate.   will be posting other video cards  soon .   They will work fine in  all macpros  1.1 to 5.1 with no issues . 

The Radeon HD 5770 Mac Edition was a graphics card by ATI, launched on July 4th, 2010. Built on the 40 nm process, and based on the Juniper graphics processor, in its Juniper XT variant, the card supports DirectX 11.2. The Juniper graphics processor is an average sized chip with a die area of 166 mm² and 1,040 million transistors. It features 800 shading units, 40 texture mapping units, and 16 ROPs. ATI has paired 1,024 MB GDDR5 memory with the Radeon HD 5770 Mac Edition, which are connected using a 128-bit memory interface. The GPU is operating at a frequency of 850 MHz, memory is running at 1195 MHz (4.8 Gbps effective).
Being a dual-slot card, the ATI Radeon HD 5770 Mac Edition draws power from 1x 6-pin power connector, with power draw rated at 108 W maximum. Display outputs include: 1x DVI, 2x mini-DisplayPort 1.1. Radeon HD 5770 Mac Edition is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card's dimensions are 208 mm x 111 mm x 37 mm, and it features a dual-slot cooling solution.