Genuine Apple Ati Radeon Hd 5770 1gb Graphics Card For Mac

HELP!

OK, So I've just ordered my new Mac Pro for work and here's the spec:

The Radeon HD 5770 Mac Edition was a graphics card by ATI, launched in July 2010. Built on the 40 nm process, and based on the Juniper graphics processor,. MC742ZM/A (.) ATI Radeon HD 5770 Graphics Upgrade Kit for Mac Pro. 1GB of GDDR5 memory, PCI Express 2.0, two Mini DisplayPort outputs, and one dual-link DVI port. Up to 2560 x 1600 resolution. 1 Year OWC Warranty.

MAC PRO

Two 2.66GHz 6-Core Intel Xeon

Memory: 12GB (6X2GB)

2 x ATI Radeon HD 5770 1GB Graphic cards

2 x 512GB Solid State Drives

2 x HD Cinema screens

One 18x SuperDrive

JOINT VENTURE MEMBERSHIP

£8,950.00 (ouch!) being made up now, and delivered next week.

What I need to know is would it be better / faster going for 1 x ATI Radeon HD 5870 1 GB or stick with the 2 x HD 5770's graphc cards?

Swift playground ar. I popped into The Apple store in Regent Street, London today and as a Joint Venture Business account holder I got to see someone straight away and no one could answer me the question which would be better or faster?

1 x ATI Radeon HD 5870

or the

2 x ATI Radeon HD 5770

I work with extremely High Resoultion Image and design files, so it's imperitive to get the best.

I very much look forward to your valued opiions.

Yours.

Rob Jarvis

Photographer

Mac Pro, Mac OS X (10.7.2)

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