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GeForce GTX 280 vs Radeon HD 4870 2GB

Intro

The GeForce GTX 280 uses a 65 nm design. nVidia has set the core frequency at 602 MHz. The GDDR3 memory is set to run at a speed of 1107 MHz on this card. It features 240 SPUs as well as 80 TAUs and 32 ROPs.

Compare that to the Radeon HD 4870 2GB, which features a clock speed of 750 MHz and a GDDR5 memory speed of 900 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 2GB 150 Watts
GeForce GTX 280 236 Watts
Difference: 86 Watts (57%)

Memory Bandwidth

Performance-wise, the GeForce GTX 280 should in theory be much better than the Radeon HD 4870 2GB in general. (explain)

GeForce GTX 280 141696 MB/sec
Radeon HD 4870 2GB 115200 MB/sec
Difference: 26496 (23%)

Texel Rate

The GeForce GTX 280 will be quite a bit (about 61%) better at texture filtering than the Radeon HD 4870 2GB. (explain)

GeForce GTX 280 48160 Mtexels/sec
Radeon HD 4870 2GB 30000 Mtexels/sec
Difference: 18160 (61%)

Pixel Rate

The GeForce GTX 280 will be quite a bit (about 61%) better at anti-aliasing than the Radeon HD 4870 2GB, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 280 19264 Mpixels/sec
Radeon HD 4870 2GB 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 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 4870 2GB
Manufacturer nVidia AMD
Year June 17, 2008 Jun 25, 2008
Code Name G200 RV770 XT
Memory 1024 MB 2048 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 data (counted in megabytes per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics 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 can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 280

Amazon.com

Check prices at:

Radeon HD 4870 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.

Comments

One Response to “GeForce GTX 280 vs Radeon HD 4870 2GB”
Denis says:

GTX 280 vs 4870 2GB

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