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GeForce GTX 480 vs GeForce GTX 660


Intro

The GeForce GTX 480 comes with clock speeds of 700 MHz on the GPU, and 924 MHz on the 1536 MB of GDDR5 memory. It features 480 SPUs as well as 60 TAUs and 48 Rasterization Operator Units.

Compare those specifications to the GeForce GTX 660, which has clock speeds of 980 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. It features 960 SPUs as well as 80 Texture Address Units and 24 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 660 5090 points
GeForce GTX 480 3650 points
Difference: 1440 (39%)

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

Theoretically speaking, the GeForce GTX 480 will be 23% faster than the GeForce GTX 660 overall, due to its higher bandwidth. (explain)

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

Texel Rate

The GeForce GTX 660 will be quite a bit (more or less 87%) better at 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 running with lots of anti-aliasing is important to you, then the GeForce GTX 480 is superior to the GeForce GTX 660, by a large margin. (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

GeForce GTX 660

Specifications

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Model GeForce GTX 480 GeForce GTX 660
Manufacturer nVidia nVidia
Year March 2010 September 2012
Code Name GF100 GK106
Memory 1536 MB 2048 MB
Core Speed 700 MHz 980 MHz
Memory Speed 3696 MHz 6008 MHz
Power (Max TDP) 250 watts 140 watts
Bandwidth 177408 MB/sec 144192 MB/sec
Texel Rate 42000 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 33600 Mpixels/sec 23520 Mpixels/sec
Unified Shaders 480 960
Texture Mapping Units 60 80
Render Output Units 48 24
Bus Type GDDR5 GDDR5
Bus Width 384-bit 192-bit
Fab Process 40 nm 28 nm
Transistors 3000 million 2540 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.0
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

GeForce GTX 480

GeForce GTX 660

Comments

2 Responses to “GeForce GTX 480 vs GeForce GTX 660”
Help! I need a new graphics card. says:

[...] £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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