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GeForce GTX 460 1GB vs Radeon HD 5870

Intro

The GeForce GTX 460 1GB features a GPU core clock speed of 675 MHz, and the 1024 MB of GDDR5 memory runs at 900 MHz through a 256-bit bus. It also features 336 SPUs, 56 Texture Address Units, and 32 ROPs.

Compare that to the Radeon HD 5870, which makes use of a 40 nm design. AMD has clocked the core speed at 850 MHz. The GDDR5 memory runs at a frequency of 1200 MHz on this particular model. It features 1600(320x5) SPUs along with 80 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 1GB 160 Watts
Radeon HD 5870 188 Watts
Difference: 28 Watts (18%)

Memory Bandwidth

The Radeon HD 5870 should theoretically be a lot faster than the GeForce GTX 460 1GB overall. (explain)

Radeon HD 5870 153600 MB/sec
GeForce GTX 460 1GB 115200 MB/sec
Difference: 38400 (33%)

Texel Rate

The Radeon HD 5870 is quite a bit (approximately 80%) better at anisotropic filtering than the GeForce GTX 460 1GB. (explain)

Radeon HD 5870 68000 Mtexels/sec
GeForce GTX 460 1GB 37800 Mtexels/sec
Difference: 30200 (80%)

Pixel Rate

The Radeon HD 5870 will be quite a bit (about 26%) better at full screen anti-aliasing than the GeForce GTX 460 1GB, and should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 5870 27200 Mpixels/sec
GeForce GTX 460 1GB 21600 Mpixels/sec
Difference: 5600 (26%)

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

GeForce GTX 460 1GB

Radeon HD 5870

Specifications

Display Specifications

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Model GeForce GTX 460 1GB Radeon HD 5870
Manufacturer nVidia AMD
Year July 2010 September 23, 2009
Code Name GF104 Cypress XT
Memory 1024 MB 1024 MB
Core Speed 675 MHz 850 MHz
Memory Speed 3600 MHz 4800 MHz
Power (Max TDP) 160 watts 188 watts
Bandwidth 115200 MB/sec 153600 MB/sec
Texel Rate 37800 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 336 1600(320x5)
Texture Mapping Units 56 80
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 1950 million 2154 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 3.2

Memory Bandwidth: Bandwidth is the largest amount of information (counted in MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 amount of pixels that the graphics chip could possibly write to the 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 - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

GeForce GTX 460 1GB

Radeon HD 5870

Comments

One Response to “GeForce GTX 460 1GB vs Radeon HD 5870”
diego says:

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