OpenRails v645 performance

[conrail1]

Here are some screens taken in the same location/camera angle as some of the screen shots taken with OR v360 here in this thread ( https://www.trainsim.com/vbts/showth...60-performance ) to show a performance comparison between the two development builds.

All of the screens were originally taken at 1920x1200 resolution, 8x supersample AA/16xAF with the options in OR set at their maximum settings.

The specs on the system used for these screens can be found in my signature. Some of the hardware has changed on this machine since the v360 screens were taken. The GTX 480 was replaced with a GTX 580 and not that it would affect frame rates, a 600GB WD VelociRaptor was added. Other then the hardware changes, a fresh Windows 7 64 install with service pack 1 was also used along with Nvidia’s latest 267.32 drivers.

The performance with v645 is quite a bit different when compared to the v360 screens.


OR options -









80 FPS -




103 FPS -




134 FPS -

[conrail1]

162 FPS -



71 FPS -



99 FPS -




99 FPS-




90 FPS -




In addition to the GTX 580/i7 980X setup that was used for these screens I also tested OR v645 my other ATI 5870/i7 975X gaming setup on both a fresh install of Windows 7 64/SP1 and XP/SP2 64-bit Edition (using the Catalyst 11.2 and the 11.4 “Preview” drivers).

Performance was pretty much the same between the two OS’s but just as experienced with OR v360 the ATI card was crippled by when super sample AA was used. Without using supersample AA the performance was good but the transparency texture shimmering pretty much killed image quality.

I’ll put some results from the i7 975X/ATI 5870 when I get a chance.

[conrail1]

Here are some screen shots using the ATI 5870/i7 975X based machine using the new ATI 11.4 Catalyst preview drivers on a fresh install of Windows 7 Ultimate 64/SP1.

As mentioned before super sampling AA even with ATI's higher end GPU's can cripple performance depending on the application so the highest AA I could use was 8x Adaptive AA.

Unfortunately the Adaptive AA setting did not get rid of the usual transparency texture shimmering issue that plagues ATI video cards.

All of the screen shots were originally taken at 1920x1200 resolution 8x Adaptive AA/16xAF (unless noted otherwise) -


76 fps -





Here is a comparision screen that shows the performance impact of using super sampling AA -

42 fps -







118 fps -



130 fps -




135 fps -



66 fps -



83 fps -






The best image quality I could get out of the ATI card was using 24x Edge Detect, super sampling AA with of course a hefty performance hit -


38 fps -


48 fps -




As with every other driver I've used with the 5870, forcing v-sync on games without a “in-game v-sync” option still does not work with Windows Vista or Windows 7. It did still work with Windows XP/SP2 64 bit and the Catalyst 11.2's that I tested previous to the Windows 7 install.

I had to use Radeon Pro (http://www.radeonpro.info/en-US/) to force v-sync on OpenRails with Windows 7 by creating a profile for the game.