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GeForce GTX 285 1GB vs Radeon HD 4890 1GB

Intro

The GeForce GTX 285 1GB has a clock speed of 648 MHz and a GDDR3 memory frequency of 1242 MHz. It also features a 512-bit memory bus, and makes use of a 55 nm design. It is comprised of 240 SPUs, 80 TAUs, and 32 Raster Operation Units.

Compare those specifications to the Radeon HD 4890 1GB, which has a clock frequency of 1000 MHz and a GDDR5 memory frequency of 975 MHz. It also uses a 256-bit bus, and makes use of a 55 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

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

Theoretically speaking, the GeForce GTX 285 1GB should be 27% faster than the Radeon HD 4890 1GB overall, because of its higher data rate. (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 should be quite a bit (approximately 30%) better at texture 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 quite a bit (approximately 30%) faster with regards to anti-aliasing than the Radeon HD 4890 1GB, and also able to handle higher 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

GeForce GTX 285 1GB

Amazon.com

Radeon HD 4890 1GB

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Model GeForce GTX 285 1GB Radeon HD 4890 1GB
Manufacturer nVidia AMD
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: Memory bandwidth is the largest amount of data (counted in MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should 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 can be applied per second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

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