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GeForce GTX 470 vs Radeon HD 5770


Intro

The GeForce GTX 470 comes with a clock speed of 607 MHz and a GDDR5 memory frequency of 837 MHz. It also uses a 320-bit bus, and makes use of a 40 nm design. It is made up of 448 SPUs, 56 TAUs, and 40 Raster Operation Units.

Compare all that to the Radeon HD 5770, which comes with GPU core speed of 850 MHz, and 1024 MB of GDDR5 memory running at 1200 MHz through a 128-bit bus. It also features 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770 108 Watts
GeForce GTX 470 215 Watts
Difference: 107 Watts (99%)

Memory Bandwidth

The GeForce GTX 470, in theory, should perform much faster than the Radeon HD 5770 overall. (explain)

GeForce GTX 470 133920 MB/sec
Radeon HD 5770 76800 MB/sec
Difference: 57120 (74%)

Texel Rate

The Radeon HD 5770 will be a little bit (more or less 0%) faster with regards to texture filtering than the GeForce GTX 470. (explain)

Radeon HD 5770 34000 Mtexels/sec
GeForce GTX 470 33992 Mtexels/sec
Difference: 8 (0%)

Pixel Rate

The GeForce GTX 470 should be a lot (approximately 79%) faster with regards to FSAA than the Radeon HD 5770, and will be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 470 24280 Mpixels/sec
Radeon HD 5770 13600 Mpixels/sec
Difference: 10680 (79%)

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 470

Radeon HD 5770

Specifications

Display Specifications

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Model GeForce GTX 470 Radeon HD 5770
Manufacturer nVidia AMD
Year March 2010 October 13, 2009
Code Name GF100 Juniper XT
Memory 1280 MB 1024 MB
Core Speed 607 MHz 850 MHz
Memory Speed 3348 MHz 4800 MHz
Power (Max TDP) 215 watts 108 watts
Bandwidth 133920 MB/sec 76800 MB/sec
Texel Rate 33992 Mtexels/sec 34000 Mtexels/sec
Pixel Rate 24280 Mpixels/sec 13600 Mpixels/sec
Unified Shaders 448 800(160x5)
Texture Mapping Units 56 40
Render Output Units 40 16
Bus Type GDDR5 GDDR5
Bus Width 320-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 3000 million 1040 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 max amount of information (measured in megabytes per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

GeForce GTX 470

Radeon HD 5770

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