Unable to use GTX 970 in Sony Vegas 11 for GPU Acceleration

[ZigglePuff]

here are my specs:
CPU: Intel Core i5-3470 3.2GHz Quad-Core Processor
Motherboard: Gigabyte GA-H77-DS3H ATX LGA1155
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory
Storage: Crucial M4 128GB 2.5" Solid State Drive
Storage: Samsung 256GB Solid State Drive
Storage: Western Digital 1TB Internal Hard Drive
Video Card: Asus GeForce GTX 970 4GB STRIX Video Card
Power Supply: Corsair Builder 600W

I am having a problem where i cannot have Sony Vegas to use my GPU to accelerate rendering. If I select "render with GPU if available", I hit okay and this appears: http://prntscr.com/5lpfgl
Sony vegas acknowledges that the card is there, yet I always get that popup.

I heard that Maxwell cards are not yet supported and/or i have to upgrade to a newer SV.

Here is my rendering specs: http://prntscr.com/5lpg6f

Thank you to all who help in advance.

 

[DexterDave]

I had the same problem. I put my GTX 570 back in and it works great.