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GeForce GTX 480 vs GeForce GTX 660

Intro

The GeForce GTX 480 has a GPU clock speed of 700 MHz, and the 1536 MB of GDDR5 memory runs at 924 MHz through a 384-bit bus. It also is comprised of 480 Stream Processors, 60 TAUs, and 48 Raster Operation Units.

Compare those specifications to the GeForce GTX 660, which uses a 28 nm design. nVidia has set the core frequency at 980 MHz. The GDDR5 memory works at a speed of 1502 MHz on this specific model. It features 960 SPUs as well as 80 TAUs and 24 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
GeForce GTX 480 250 Watts
Difference: 110 Watts (79%)

Memory Bandwidth

Performance-wise, the GeForce GTX 480 should theoretically be a lot superior to the GeForce GTX 660 in general. (explain)

GeForce GTX 480 177408 MB/sec
GeForce GTX 660 144192 MB/sec
Difference: 33216 (23%)

Texel Rate

The GeForce GTX 660 should be much (approximately 87%) faster with regards to anisotropic filtering than the GeForce GTX 480. (explain)

GeForce GTX 660 78400 Mtexels/sec
GeForce GTX 480 42000 Mtexels/sec
Difference: 36400 (87%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 480 is the winner, and very much so. (explain)

GeForce GTX 480 33600 Mpixels/sec
GeForce GTX 660 23520 Mpixels/sec
Difference: 10080 (43%)

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 480

Amazon.com

GeForce GTX 660

Amazon.com

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.

Specifications

Model GeForce GTX 480 GeForce GTX 660
Manufacturer nVidia nVidia
Year March 2010 September 2012
Code Name GF100 GK106
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 1536 MB 2048 MB
Core Speed 700 MHz 980 MHz
Shader Speed 1401 MHz 980 MHz
Memory Speed 924 MHz (3696 MHz effective) 1502 MHz (6008 MHz effective)
Unified Shaders 480 960
Texture Mapping Units 60 80
Render Output Units 48 24
Bus Type GDDR5 GDDR5
Bus Width 384-bit 192-bit
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3
Power (Max TDP) 250 watts 140 watts
Shader Model 5.0 5.0
Bandwidth 177408 MB/sec 144192 MB/sec
Texel Rate 42000 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 33600 Mpixels/sec 23520 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 number of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. 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 fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Comments

2 Responses to “GeForce GTX 480 vs GeForce GTX 660”
[...] £178.39. Looks like a nice graphics card at not an unreasonable price. Comparing the two, using: HWCompare I am not sure my motherboard can cope & would support the GTX 660's Bus requirement: [...]
DasPootisXD says:
I have money for either one and I need help on deciding on which one I should buy. Other question is: what use is texel rate and how important it is?

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