So if those are the results on a G5 machine what are the chances of being to play Doom 3 on a Powerbook with decent settings?
|Doom 3 for Mac slower than PC equivalent
By Wil Harris: Monday 21 March 2005, 10:56
DOOM 3 for the Macintosh can run 30% slower than its PC equivalent on similar hardware, according to benchmarks published by Bare Feats.
Testing a PowerMac G5 2.5GHz system with a GeForce 6800 Ultra, Timedemo 1 in the game came out at 53FPS. With an Athlon FX55 (at native 2.6GHz) and similar GeForce 6800 Ultra, the score was 76FPS, with a resolution of 1600x1200 at High Quality.
Mac users are understandably a little miffed about the differences in speed, especially given the huge amount of money that a tricked-out G5 can cost. Aspyr Media, who handled the conversion of the game to OSX, had some interesting comments about the performance.
According to the firm, the PowerPC architecture includes a high performance penalty for floating point to integer conversion, a technique commonly used on PC games. However, the biggest bottleneck appears to be OpenGL. The Mac uses OpenGL system wide, and uses it for many standard operations - but this sharing leads to a performance hit in games. The amount of time ATI and Nvidia have had to optimize their drivers for OpenGL Doom 3 on Mac also appears to be minimal, especially considering the enormous amount of work both companies put into the PC version last year.
Handily, the Bare Feats chaps suggest disabling Shadows in the game to get a better frame rate. Of course, anyone who knows Doom 3 will know that this does rather kill the atmosphere.
Aspyr is quoted as saying that it hopes the fact that Doom 3 is such a 'visible benchmark' will lead to graphics companies spending more time tweaking the performance on the Mac platform. We hope that the poor performance will send a message to Cappuccino that more needs to be done to encourage and aid game development on the Mac. µ