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GeForce GTX 280 vs Radeon HD 4870 512MB

Intro

The GeForce GTX 280 makes use of a 65 nm design. nVidia has clocked the core speed at 602 MHz. The GDDR3 memory is set to run at a frequency of 1107 MHz on this specific card. It features 240 SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Compare all of that to the Radeon HD 4870 512MB, which has clock speeds of 750 MHz on the GPU, and 900 MHz on the 512 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 512MB 150 Watts
GeForce GTX 280 236 Watts
Difference: 86 Watts (57%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 280 should perform much faster than the Radeon HD 4870 512MB overall. (explain)

GeForce GTX 280 141696 MB/sec
Radeon HD 4870 512MB 115200 MB/sec
Difference: 26496 (23%)

Texel Rate

The GeForce GTX 280 should be much (about 61%) faster with regards to texture filtering than the Radeon HD 4870 512MB. (explain)

GeForce GTX 280 48160 Mtexels/sec
Radeon HD 4870 512MB 30000 Mtexels/sec
Difference: 18160 (61%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 280 is a better choice, by far. (explain)

GeForce GTX 280 19264 Mpixels/sec
Radeon HD 4870 512MB 12000 Mpixels/sec
Difference: 7264 (61%)

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 4870 512MB

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 4870 512MB
Manufacturer nVidia AMD
Year June 17, 2008 Jun 25, 2008
Code Name G200 RV770 XT
Memory 1024 MB 512 MB
Core Speed 602 MHz 750 MHz
Memory Speed 2214 MHz 3600 MHz
Power (Max TDP) 236 watts 150 watts
Bandwidth 141696 MB/sec 115200 MB/sec
Texel Rate 48160 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 19264 Mpixels/sec 12000 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 956 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 largest amount of information (measured in MB per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the video 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 most pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out 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 filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GTX 280

Amazon.com

Check prices at:

Radeon HD 4870 512MB

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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