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GeForce GTX 480 vs GeForce GTX 660

Intro

The GeForce GTX 480 comes with core speeds of 700 MHz on the GPU, and 924 MHz on the 1536 MB of GDDR5 RAM. It features 480 SPUs as well as 60 TAUs and 48 ROPs.

Compare those specs to the GeForce GTX 660, which has a core clock frequency of 980 MHz and a GDDR5 memory frequency of 1502 MHz. It also features a 192-bit memory bus, and uses a 28 nm design. It is made up of 960 SPUs, 80 TAUs, and 24 ROPs.

(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

In theory, the GeForce GTX 480 is 23% quicker than the GeForce GTX 660 overall, because of 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 should be a lot (approximately 87%) more effective 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

The GeForce GTX 480 is quite a bit (more or less 43%) more effective at full screen anti-aliasing than the GeForce GTX 660, and should be capable of handling higher screen resolutions without losing too much performance. (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: Bandwidth is the largest amount of data (measured in MB per second) that can be moved 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 it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max 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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