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GeForce GTX 280 vs Radeon HD 4890 2GB

Intro

The GeForce GTX 280 comes with a clock frequency of 602 MHz and a GDDR3 memory speed of 1107 MHz. It also uses a 512-bit bus, and uses a 65 nm design. It is made up of 240 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

Compare all of that to the Radeon HD 4890 2GB, which uses a 55 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 RAM works at a speed of 975 MHz on this model. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

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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, the GeForce GTX 280 should be a small bit faster than the Radeon HD 4890 2GB in general. (explain)

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

Texel Rate

The GeForce GTX 280 is a bit (more or less 20%) better at 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 using lots of anti-aliasing is important to you, then the GeForce GTX 280 is superior to the Radeon HD 4890 2GB, but it probably won't make a huge difference. (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: Bandwidth is the maximum amount of data (measured in MB per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the 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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