In this paper we report on calculations of energy levels, radiative rates, oscillator strengths, line strengths, and effective collision strengths for transitions among the lowest 362 levels of the (1s^2^2s^2^2p^6^) 3s^2^3p^5^, 3s3p^6^, 3s^2^3p^4^3d, 3s3p^5^3d, 3s^2^3p^3^3d^2^, 3s3p^4^3d^2^, 3p^6^3d, and 3s^2^3p^4^4l configurations of Cr VIII.