STALKER: Clear Sky	Source: GSC

Stalker: Clear Sky is a prequel to Stalker: Shadow of Chernobyl. The player assumes the role of Scar, a veteran Stalker mercenary who is rescued by Clear Sky, a faction looking to explore the ruins of the Chernobyl power plant and solve the mystery at the heart of the Zone. The Sun Shafts test is part of Stalker's benchmarking suite, which uses DirectX 10 graphics capabilities and can stress even the fastest videocards.

STALKER Clear Sky - Ultra HQ / DX10 / NoAA Sun Shafts Test 1600x1200 Points Ranking Palit HD4870 X2 2GB 39.6 Asus EAH4890 HTDI/1GD5/A (rev.A) 24.5742 Asus EAH4890 HTDI/1GD5/A 24.6 Asus EAH4850 HTDI/512M 16.76 Gigabyte GV-R477D5-512HB 20.7 Gigabyte GV-R477D5-512HB Crossfire 31.5 Asus EAH4770 FML/DI/512MD5/A 17.1469 Gigabyte GV-R435OC-512I 2.5 Gigabyte GV-N285OC-2G1 29.0654 Gigabyte GV-N26SO-896I 28.4 ASUS ENGTX260 MT/HTDI/896MD3-A 22.84 Gigabyte GV-N26OC896H-GA 24.63 Sparkle GTX260 Core 216 25.1 ASUS ENGTS250 DK 17.28 ASUS EN9600GT DI/512MD3/A 9.26 ASUS EN9400GT DI/1GLP 2.24 Sun Shafts Test 1900x1200 Points Ranking Palit HD4870 X2 2GB 34.3 Asus EAH4890 HTDI/1GD5/A (rev.A) 21.62 Asus EAH4890 HTDI/1GD5/A 21.6 Asus EAH4850 HTDI/512M 14.8 Gigabyte GV-R477D5-512HB 15.2 Gigabyte GV-R477D5-512HB Crossfire 27.3 Asus EAH4770 FML/DI/512MD5/A 15.02 Gigabyte GV-R435OC-512I 1.5 Gigabyte GV-N285OC-2G1 25.5 Gigabyte GV-N26SO-896I 23.9 ASUS ENGTX260 MT/HTDI/896MD3-A 20.03 Gigabyte GV-N26OC896H-GA 21.5 Sparkle GTX260 Core 216 19.9 ASUS ENGTS250 DK 13.9 ASUS EN9600GT DI/512MD3/A 8.06 ASUS EN9400GT DI/1GLP 1.5