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GeForce GTX 460 1GB vs GeForce GTX 480


Intro

The GeForce GTX 460 1GB comes with clock speeds of 675 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 RAM. It features 336 SPUs as well as 56 Texture Address Units and 32 ROPs.

Compare those specifications to the GeForce GTX 480, which comes with a clock speed of 700 MHz and a GDDR5 memory speed of 924 MHz. It also makes use of a 384-bit bus, and uses a 40 nm design. It is made up of 480 SPUs, 60 Texture Address Units, and 48 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 1GB 160 Watts
GeForce GTX 480 250 Watts
Difference: 90 Watts (56%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 480 should be 54% quicker than the GeForce GTX 460 1GB overall, because of its higher bandwidth. (explain)

GeForce GTX 480 177408 MB/sec
GeForce GTX 460 1GB 115200 MB/sec
Difference: 62208 (54%)

Texel Rate

The GeForce GTX 480 will be just a bit (approximately 11%) more effective at AF than the GeForce GTX 460 1GB. (explain)

GeForce GTX 480 42000 Mtexels/sec
GeForce GTX 460 1GB 37800 Mtexels/sec
Difference: 4200 (11%)

Pixel Rate

The GeForce GTX 480 will be quite a bit (about 56%) more effective at full screen anti-aliasing than the GeForce GTX 460 1GB, and also will be capable of handling higher screen resolutions better. (explain)

GeForce GTX 480 33600 Mpixels/sec
GeForce GTX 460 1GB 21600 Mpixels/sec
Difference: 12000 (56%)

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

GeForce GTX 480

Specifications

Display Specifications

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Model GeForce GTX 460 1GB GeForce GTX 480
Manufacturer nVidia nVidia
Year July 2010 March 2010
Code Name GF104 GF100
Memory 1024 MB 1536 MB
Core Speed 675 MHz 700 MHz
Memory Speed 3600 MHz 3696 MHz
Power (Max TDP) 160 watts 250 watts
Bandwidth 115200 MB/sec 177408 MB/sec
Texel Rate 37800 Mtexels/sec 42000 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 33600 Mpixels/sec
Unified Shaders 336 480
Texture Mapping Units 56 60
Render Output Units 32 48
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit
Fab Process 40 nm 40 nm
Transistors 1950 million 3000 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must 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 texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, 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 amount of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core 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 also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

GeForce GTX 460 1GB

GeForce GTX 480

Comments

2 Responses to “GeForce GTX 460 1GB vs GeForce GTX 480”
Hannes says:

What card is above gtx 480?

Wolfe King says:

That would depend on what you consider "above". The 580, 660 (maybe), 760, 6970, 7870, and likely 8770 when it comes out will be above it. Though some of that depends on what you are using it for, as I get better frames on a 480 than I ever did on my 6970s with Metro 2033.

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