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GeForce GTX 280 vs Radeon HD 4890 2GB

Intro

The GeForce GTX 280 comes with a GPU core clock speed of 602 MHz, and the 1024 MB of GDDR3 RAM is set to run at 1107 MHz through a 512-bit bus. It also features 240 Stream Processors, 80 Texture Address Units, and 32 ROPs.

Compare all of that to the Radeon HD 4890 2GB, which makes use of a 55 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 memory runs at a speed of 975 MHz on this particular model. It features 800(160x5) SPUs along with 40 Texture Address Units 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

The GeForce GTX 280 should theoretically perform just a bit faster than the Radeon HD 4890 2GB overall. (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 little bit (about 20%) faster with regards to texture filtering 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

If running with high levels of AA is important to you, then the GeForce GTX 280 is a better choice, but not by far. (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 maximum amount of information (measured in megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount 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 also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

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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