AMD R9 285 2GB CrossFire Scaling and Performance - Page 2

Submitted by Jason Singh on Tue, 10/06/2015 - 12:20

1080p Crossfire Performance

Menu
Introduction and Test System
1080p Crossfire Performance
1440p Crossfire Performance
Conclusion-Is it worth it?

We decided to look past synthetic benchmarks and jump right into the gaming performance. 1080p monitors is still what most users have and we don’t see the need for a user to add in a second R9 285 at 1080p mainly owing to the fact that he or she would end up being bottlenecked by the resolution itself. Bottlenecking is usually a term associated with a CPU or a GPU but in certain cases it’s a monitor and it’s resolution that holds back the performance of the GPUs. At 1080p the R9 285 in CrossFire may not be pushed to it’s maximum potential. However, performance will still be higher than a single R9 285. Our expectations regarding CrossFire was that the second card would scale at par with a GPU belonging to a tier or two lower than it. Running the R9 285 in CrossFire was somewhat close using a R9 285 alongside a R9 270 and in some cases the R7 265. This is because there is no such thing as perfect scalability. It all depends upon software optimization and the ability of the drivers to communicate with software, in this case, the game engine. Thus, testing games while using the R9 285 in CrossFire gave us an idea of it’s real world performance. This is where synthetic benchmarks fall short as they will output a score exactly equal to two R9 285’s which isn’t quite a good depiction of it’s real world performance.  

This bring us to whether the two R9 285’s are better than a single high end GPU like the R9 290/390 or even the R9 290X/390X. The results of the CrossFire testing lead us to believe that it would be closer to the performance of a R9 290X/390X. However, since we did not have a R9 290/390X to test we cannot conclude this based on fact but can conclude it based on sheer experience and speculation. Adding a second R9 285 at 1080p resulted in an average performance boost. We decided to also make use of a chart towards the bottom of the page, summarizing the performance of the R9 285 in CrossFire for 1080p gaming. The CPU was clocked to 4.8Ghz to alleviate any CPU bottleneck while the GPUs were run at their stock clock speed of 965/1400Mhz. We left the Ram speed at 1866Mhz, CL 11.

Games Tested

  • Shadow of Mordor
  • Tomb Raider
  • Metro 2033 Redux
  • Metro Last Light Redux
  • Dirt 3
  • Sleeping Dogs
  • Resident Evil 6

 

Shadow of Mordor

Settings:

Lighting Quality:High, Mesh Quality:Ultra, Motion Blur:Camera and Objects, Shadow Quality:High, Texture Filtering:Ultra, Texture Quality:High, Ambient Occlusion:Medium, Vegetation Range:Ultra, Depth of Field:On, Order Independent Transparency:On, Tessellation:On

 

Tomb Raider

Settings:

Quality:Ultimate Preset

 

Metro 2033 Redux

Settings:

Quality:Very High, SSAA:Off, Texture Filtering:X16, Motion Blur:Normal, Tessellation:Very High, Advanced PhysX:Off

 

Metro Last Light Redux

Settings:

Quality:Very High, SSAA:Off, Texture Filtering:X16, Motion Blur:Normal, Tessellation:Very High, Advanced PhysX:Off

 

Dirt 3

Settings:

Quality:Ultra Preset, MSAA:x8

 

Sleeping Dogs

Settings:

Quality:Extreme Preset, High Resolution Textures:Enabled

 

Resident Evil 6

Settings:

Anti-Alias:FXAA3QH, Motion Blur:On, Shadow Quality:High, Texture Quality:High, Screen Quality:High

 

Performance Summary

Games

R9 285 FPS/Score

R9 285 Crossfire FPS/Score

Increase in FPS/Score

Shadow of Mordor

69.79

98.93

29.14

Tomb Raider

61.5

115.2

53.7

Metro 2033 Redux

41.68

50.72

9.04

Metro Last Light Redux

53.72

72.63

18.91

Dirt 3

83.55

149.05

65.5

Sleeping Dogs

46.7

86.6

39.9

Resident Evil 6

9767

10414

647

 

 

 

 

 

Pages

About the Author

glqxz9283 sfy39587stf02 mnesdcuix8
sfy39587stf03
sfy39587stf04