I ran some synthetic benchmarks, just for curiousity's sake. All benchmarks run at their lowest settings.
FurMark:
No rendering errors, but a terrible score of 26 points, or between 0-2 fps.
Unigine Heaven:
Lots of rendering errors (example below). Also very slow, with a score of 34 points (1.1-1.9 fps).
Unigine Valley:
This one won't even start. The loading screen appears, but the benchmark crashes right as it attempts to do any rendering. Here's the Windows report:
Problem signature:
Problem Event Name: APPCRASH
Application Name: valley.exe
Application Version: 1.0.0.0
Application Timestamp: 511cbdf2
Fault Module Name: igdumd32.dll
Fault Module Version: 8.14.8.1091
Fault Module Timestamp: 5142c2bb
Exception Code: c0000005
Exception Offset: 0006fd3d
OS Version: 6.1.7601.2.1.0.768.11
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789
NovaBench GPU Test:
No rendering errors (I think). I get 32 fps out of it, which, for a super-simple benchmark like this, is pathetic. Good for 8 points.