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GeForce GTX 285 1GB vs Radeon HD 4890 1GB

Intro

The GeForce GTX 285 1GB comes with a GPU core speed of 648 MHz, and the 1024 MB of GDDR3 memory runs at 1242 MHz through a 512-bit bus. It also features 240 Stream Processors, 80 TAUs, and 32 ROPs.

Compare those specs to the Radeon HD 4890 1GB, which uses a 55 nm design. ATi has clocked the core speed at 1000 MHz. The GDDR5 memory works at a frequency of 975 MHz on this specific card. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Avatar

Settings: Ultra High Quality
AA: 8x
AF: none
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
GeForce GTX 285 1GB 42 FPS
Radeon HD 4890 1GB 36 FPS
Difference: 6 FPS (17%)

Battlefield Bad Company 2

Settings: High Quality
AA: 4x
AF: 8x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
GeForce GTX 285 1GB 40 FPS
Radeon HD 4890 1GB 36 FPS
Difference: 4 FPS (11%)

Crysis

Settings: Very High
AA: none
AF: none
Resolution: 1680x1050
Test Machine: Intel Core i7-975 Extreme, 6GB RAM, Windows 7 x64, DirectX 11 (Source)
GeForce GTX 285 1GB 29 FPS
Radeon HD 4890 1GB 29 FPS
Difference: 0 FPS (0%)

Crysis Warhead

Settings: Gamer Setting
AA: none
AF: none
Resolution: 1680 x 1050
Test Machine: Intel Core i7 920 ,Vista Ultimate x64 SP1 , 3x2GB Ram (Source)
GeForce GTX 285 1GB 48 FPS
Radeon HD 4890 1GB 45 FPS
Difference: 3 FPS (7%)

F.E.A.R. 2

Settings: Maximum Quality
AA: 4x
AF: 8x
Resolution: 1920x1200
Test Machine: Unknown (Source)
Radeon HD 4890 1GB 88 FPS
GeForce GTX 285 1GB 80 FPS
Difference: 8 FPS (10%)

Fallout 3

Settings: Very High Quality
AA: 8x
AF: 16x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
GeForce GTX 285 1GB 66 FPS
Radeon HD 4890 1GB 63 FPS
Difference: 3 FPS (5%)

Fallout 3

Settings: Very High Quality
AA: 4x
AF: 8x
Resolution: 1680x1050
Test Machine: Tom's Hardware Charts Test Rig (Source)
GeForce GTX 285 1GB 89 FPS
Radeon HD 4890 1GB 80 FPS
Difference: 9 FPS (11%)

Left4Dead

Settings: Very High Quality
AA: 8x
AF: 16x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 4890 1GB 80 FPS
GeForce GTX 285 1GB 77 FPS
Difference: 3 FPS (4%)

Left4Dead

Settings: Very High Quality
AA: 4x
AF: 8x
Resolution: 1920x1200
Test Machine: Tom's Hardware Charts Test Rig (Source)
GeForce GTX 285 1GB 97 FPS
Radeon HD 4890 1GB 87 FPS
Difference: 10 FPS (11%)

Mass Effect 2

Settings: Maximum Quality
AA: none
AF: 8x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
GeForce GTX 285 1GB 121 FPS
Radeon HD 4890 1GB 107 FPS
Difference: 14 FPS (13%)

Supreme Commander 2

Settings: High
AA: 8x
AF: 16x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
Radeon HD 4890 1GB 64 FPS
GeForce GTX 285 1GB 44 FPS
Difference: 20 FPS (45%)

Tom Clancy's Endwar

Settings: High Quality
AA: 4x
AF: 8x
Resolution: 1920x1200
Test Machine: Tom's Hardware Test Machine (Source)
GeForce GTX 285 1GB 30 FPS
Radeon HD 4890 1GB 30 FPS
Difference: 0 FPS (0%)

Tom Clancy's H.A.W.X

Settings: High Quality
AA: 4x
AF: 8x
Resolution: 1680x1050
Test Machine: Tom's Hardware Charts Test Rig (Source)
GeForce GTX 285 1GB 74 FPS
Radeon HD 4890 1GB 41 FPS
Difference: 33 FPS (80%)

GeForce GTX 285 1GB wins

(Based entirely on the benchmarks listed above)

When combining all game benchmark scores on this page together, the GeForce GTX 285 1GB wins overall, by 51 FPS. Please note that we do not have the results of every benchmark ever done for these cards, so the results may differ wildly in different games.

GeForce GTX 285 1GB 837 FPS
Radeon HD 4890 1GB 786 FPS
Difference: 51 FPS (6%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4890 1GB 190 Watts
GeForce GTX 285 1GB 204 Watts
Difference: 14 Watts (7%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 285 1GB should theoretically be much superior to the Radeon HD 4890 1GB overall. (explain)

GeForce GTX 285 1GB 158976 MB/sec
Radeon HD 4890 1GB 124800 MB/sec
Difference: 34176 (27%)

Texel Rate

The GeForce GTX 285 1GB will be quite a bit (about 30%) more effective at anisotropic filtering than the Radeon HD 4890 1GB. (explain)

GeForce GTX 285 1GB 51840 Mtexels/sec
Radeon HD 4890 1GB 40000 Mtexels/sec
Difference: 11840 (30%)

Pixel Rate

The GeForce GTX 285 1GB should be a lot (about 30%) more effective at full screen anti-aliasing than the Radeon HD 4890 1GB, and also should be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 285 1GB 20736 Mpixels/sec
Radeon HD 4890 1GB 16000 Mpixels/sec
Difference: 4736 (30%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

GeForce GTX 285 1GB

Amazon.com

Other US-based stores

Radeon HD 4890 1GB

Amazon.com

Other US-based stores

Specifications

Model GeForce GTX 285 1GB Radeon HD 4890 1GB
Manufacturer nVidia ATi
Year January 15, 2009 Apr 2, 2009
Code Name G200b RV790 XT
Fab Process 55 nm 55 nm
Bus PCIe x16 2.0 PCIe 2.0 x16
Memory 1024 MB 1024 MB
Core Speed 648 MHz 1000 MHz
Shader Speed 1476 MHz (N/A) MHz
Memory Speed 1242 MHz (2484 MHz effective) 975 MHz (3900 MHz effective)
Unified Shaders 240 800(160x5)
Texture Mapping Units 80 40
Render Output Units 32 16
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.1 OpenGL 3.0
Power (Max TDP) 204 watts 190 watts
Shader Model 4.0 4.1
Bandwidth 158976 MB/sec 124800 MB/sec
Texel Rate 51840 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 16000 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

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