It’s only in closed environments that the average speed of the PowerColor HD 2600 Pro 512MB is above the allowable minimum of 25fps. Alas, the card is too slow in open scenes to allow using 4x FSAA.
It’s somewhat better if you prefer HDR to 4x FSAA: the average speed of the PowerColor card is higher than 25fps at 1280x1024. There is, however, no reserve of speed and you have just a minimum of playing comfort. We couldn’t observe any noticeable difference between the two versions of Radeon HD 2600 Pro in this test.