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GeForce GTX 550 Ti vs Radeon HD 4870 512MB


The GeForce GTX 550 Ti makes use of a 40 nm design. nVidia has set the core frequency at 900 MHz. The GDDR5 RAM runs at a speed of 1026 MHz on this particular model. It features 192 SPUs along with 32 Texture Address Units and 24 Rasterization Operator Units.

Compare those specs to the Radeon HD 4870 512MB, which has core clock speeds of 750 MHz on the GPU, and 900 MHz on the 512 MB of GDDR5 memory. 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)

GeForce GTX 550 Ti 116 Watts
Radeon HD 4870 512MB 150 Watts
Difference: 34 Watts (29%)

Memory Bandwidth

In theory, the Radeon HD 4870 512MB should be a bit faster than the GeForce GTX 550 Ti in general. (explain)

Radeon HD 4870 512MB 115200 MB/sec
GeForce GTX 550 Ti 98496 MB/sec
Difference: 16704 (17%)

Texel Rate

The Radeon HD 4870 512MB should be a little bit (about 4%) better at AF than the GeForce GTX 550 Ti. (explain)

Radeon HD 4870 512MB 30000 Mtexels/sec
GeForce GTX 550 Ti 28800 Mtexels/sec
Difference: 1200 (4%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 550 Ti is a better choice, and very much so. (explain)

GeForce GTX 550 Ti 21600 Mpixels/sec
Radeon HD 4870 512MB 12000 Mpixels/sec
Difference: 9600 (80%)

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

Display Prices

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GeForce GTX 550 Ti

Radeon HD 4870 512MB

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.


Display Specifications

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Model GeForce GTX 550 Ti Radeon HD 4870 512MB
Manufacturer nVidia AMD
Year March 2011 Jun 25, 2008
Code Name GF116 RV770 XT
Memory 1024 MB 512 MB
Core Speed 900 MHz 750 MHz
Memory Speed 4104 MHz 3600 MHz
Power (Max TDP) 116 watts 150 watts
Bandwidth 98496 MB/sec 115200 MB/sec
Texel Rate 28800 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 192 800(160x5)
Texture Mapping Units 32 40
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 1170 million 956 million
Bus PCIe 2.1 x16 PCIe 2.0 x16
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is worked out by multiplying the total texture units 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 a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.


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