2.1/2.9 Ghz Turbo
AMD 8610G - 384 Shader Units
Intel i5 4250u
1.3/2.6 Ghz Turbo
Intel HD 5000
Settings: IGP/Value Settings from Anandtech - 1366 x 768
"The graphics unit called Radeon HD 8610G offers all 384 shader units (VLIW4) and is slightly faster than the HD 7660G. The core is clocked at 533-626 MHz (turbo)"
The 7660g will be compared with the HD 5000 in this case.
GRID 2 : Winner AMD by +8.8%
Haswell : 43.1 FPS
Richland : 46.9 FPS
Tomb Raider : Winner AMD by +6.3%
Haswell : 28.3 FPS
Richland : 30.1 FPS
Sleeping Dogs : Winner AMD by +43.9%
Haswell : 24.6 FPS
Richland : 35.4 FPS
Metro Last Light : Winner AMD by +49.3%
Haswell : 13.6 FPS
Richland : 20.3 FPS
BioShock Infinite : Winner AMD by +26.5%
Haswell : 20.4 FPS
Richland : 25.8
The HD 5000 found in the Macbook Air is only a fraction better than the HD 4400, and even has worse performance in some benchmarks and games. It looks like Iris was only effective at the 55W range, performance plumets as power decreases. AMD maintains a similar performance across all form factors from ultrathin to laptop to desktop, and this range will decrease further with Kaveri.