"To run the game on a 4K display at 30fps," says Hoare, "you’ll need at minimum an AMD HD 7870 or Nvidia GTX 760 with 2GB of VRAM." As for the 4K at 60 frames-per-second, that'll require a "high-end SLI or Crossfire setup." 『4K解像度を30fpsで動作させるには』(ロックスタートロントのボスの)Hoareが言うには『最低でもAMDのHD7870かNvidiaのGTX760、VRAMは2GBは必要』4kを60fpsで動作させるのには『ハイエンドグラフィックカードのSLIやCrossfireのを用意』する必要がある。 http://www.pcgamer.com/what-youll-need-to-run-gta-5-pc-in-4k/
Note 1: Currently, the game will not run with Windows 10, so if you've moved to 10, you'll have to wait while we hunt that problem down. Apologies for the inconvenience. Note 2: You may need to restart Steam after you have downloaded the game.