Graphics cards for rendering GPU effects in ProRes 422 (HQ)

I have two Radeon HD 2600XT Cards installed. Final cut says it cannot render my Blackmagic Intensity ProRes HQ Video using a filter such as the Bloom filter in the Glow Menu. Does anyone know of this problem??? I did capture via the Intensity card through HDMI. I would really like to work in the ProRes HQ codec. Thanks.