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GeForce GTX 280 vs Radeon HD 4890 2GB

Intro

The GeForce GTX 280 features core speeds of 602 MHz on the GPU, and 1107 MHz on the 1024 MB of GDDR3 memory. It features 240 SPUs along with 80 TAUs and 32 Rasterization Operator Units.

Compare those specs to the Radeon HD 4890 2GB, which has core speeds of 1000 MHz on the GPU, and 975 MHz on the 2048 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4890 2GB 190 Watts
GeForce GTX 280 236 Watts
Difference: 46 Watts (24%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 280 is 14% quicker than the Radeon HD 4890 2GB overall, due to its higher data rate. (explain)

GeForce GTX 280 141696 MB/sec
Radeon HD 4890 2GB 124800 MB/sec
Difference: 16896 (14%)

Texel Rate

The GeForce GTX 280 will be a small bit (more or less 20%) better at AF than the Radeon HD 4890 2GB. (explain)

GeForce GTX 280 48160 Mtexels/sec
Radeon HD 4890 2GB 40000 Mtexels/sec
Difference: 8160 (20%)

Pixel Rate

The GeForce GTX 280 will be a small bit (about 20%) more effective at AA than the Radeon HD 4890 2GB, and also should be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 280 19264 Mpixels/sec
Radeon HD 4890 2GB 16000 Mpixels/sec
Difference: 3264 (20%)

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

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GeForce GTX 280

Amazon.com

Check prices at:

Radeon HD 4890 2GB

Amazon.com

Check prices at:

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

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Model GeForce GTX 280 Radeon HD 4890 2GB
Manufacturer nVidia AMD
Year June 17, 2008 Apr 2, 2009
Code Name G200 RV790 XT
Memory 1024 MB 2048 MB
Core Speed 602 MHz 1000 MHz
Memory Speed 2214 MHz 3900 MHz
Power (Max TDP) 236 watts 190 watts
Bandwidth 141696 MB/sec 124800 MB/sec
Texel Rate 48160 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 19264 Mpixels/sec 16000 Mpixels/sec
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
Fab Process 65 nm 55 nm
Transistors 1400 million 959 million
Bus PCIe x16 2.0 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.1 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

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

Display Prices

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GeForce GTX 280

Amazon.com

Check prices at:

Radeon HD 4890 2GB

Amazon.com

Check prices at:

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.

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