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GeForce GTX 460 vs Radeon HD 5770

Intro

The GeForce GTX 460 uses a 40 nm design. nVidia has set the core speed at 675 MHz. The GDDR5 memory runs at a frequency of 900 MHz on this specific model. It features 336 SPUs as well as 56 Texture Address Units and 24 Rasterization Operator Units.

Compare those specifications to the Radeon HD 5770, which has a clock speed of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also makes use of a 128-bit bus, and makes use of a 40 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770 108 Watts
GeForce GTX 460 150 Watts
Difference: 42 Watts (39%)

Memory Bandwidth

The GeForce GTX 460, in theory, should be a bit faster than the Radeon HD 5770 overall. (explain)

GeForce GTX 460 86400 MB/sec
Radeon HD 5770 76800 MB/sec
Difference: 9600 (13%)

Texel Rate

The GeForce GTX 460 should be a small bit (approximately 11%) faster with regards to AF than the Radeon HD 5770. (explain)

GeForce GTX 460 37800 Mtexels/sec
Radeon HD 5770 34000 Mtexels/sec
Difference: 3800 (11%)

Pixel Rate

The GeForce GTX 460 is just a bit (more or less 19%) more effective at AA than the Radeon HD 5770, and also should be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 460 16200 Mpixels/sec
Radeon HD 5770 13600 Mpixels/sec
Difference: 2600 (19%)

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

Radeon HD 5770

Specifications

Display Specifications

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Model GeForce GTX 460 Radeon HD 5770
Manufacturer nVidia AMD
Year July 2010 October 13, 2009
Code Name GF104 Juniper XT
Memory 768 MB 1024 MB
Core Speed 675 MHz 850 MHz
Memory Speed 3600 MHz 4800 MHz
Power (Max TDP) 150 watts 108 watts
Bandwidth 86400 MB/sec 76800 MB/sec
Texel Rate 37800 Mtexels/sec 34000 Mtexels/sec
Pixel Rate 16200 Mpixels/sec 13600 Mpixels/sec
Unified Shaders 336 800(160x5)
Texture Mapping Units 56 40
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 1950 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: Memory bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units of the card by the core clock 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 in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. 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 is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

GeForce GTX 460

Radeon HD 5770

Comments

One Response to “GeForce GTX 460 vs Radeon HD 5770”
New Graphics Card (£100ish budget) - HEXUS.community discussion forums says:

[...] intensive games (eg Crysis) but realistically speaking it should do you very well. Comparison: http://www.hwcompare.com/8140/geforc...adeon-hd-5770/ Note that the 5770 runs at a smooth 30fps @ 1920x1200 on Battlefield Bad Company 2 on High with [...]

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