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GeForce GTX 660 vs Radeon HD 3470 256MB

Intro

The GeForce GTX 660 comes with a clock speed of 980 MHz and a GDDR5 memory speed of 1502 MHz. It also uses a 192-bit memory bus, and makes use of a 28 nm design. It features 960 SPUs, 80 Texture Address Units, and 24 Raster Operation Units.

Compare those specifications to the Radeon HD 3470 256MB, which comes with core speeds of 800 MHz on the GPU, and 950 MHz on the 256 MB of DDR2 RAM. It features 40(8x5) SPUs along with 4 Texture Address Units and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 660 should in theory be much faster than the Radeon HD 3470 256MB overall. (explain)

GeForce GTX 660 144192 MB/sec
Radeon HD 3470 256MB 30400 MB/sec
Difference: 113792 (374%)

Texel Rate

The GeForce GTX 660 will be quite a bit (about 2350%) better at AF than the Radeon HD 3470 256MB. (explain)

GeForce GTX 660 78400 Mtexels/sec
Radeon HD 3470 256MB 3200 Mtexels/sec
Difference: 75200 (2350%)

Pixel Rate

The GeForce GTX 660 will be a lot (approximately 635%) faster with regards to full screen anti-aliasing than the Radeon HD 3470 256MB, and should be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 660 23520 Mpixels/sec
Radeon HD 3470 256MB 3200 Mpixels/sec
Difference: 20320 (635%)

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

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GeForce GTX 660

Amazon.com

Check prices at:

Radeon HD 3470 256MB

Amazon.com

Check prices at:

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

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Model GeForce GTX 660 Radeon HD 3470 256MB
Manufacturer nVidia AMD
Year September 2012 2008
Code Name GK106 RV620 PRO
Memory 2048 MB 256 MB
Core Speed 980 MHz 800 MHz
Memory Speed 6008 MHz 1900 MHz
Power (Max TDP) 140 watts (Unknown) watts
Bandwidth 144192 MB/sec 30400 MB/sec
Texel Rate 78400 Mtexels/sec 3200 Mtexels/sec
Pixel Rate 23520 Mpixels/sec 3200 Mpixels/sec
Unified Shaders 960 40(8x5)
Texture Mapping Units 80 4
Render Output Units 24 4
Bus Type GDDR5 DDR2
Bus Width 192-bit 128-bit
Fab Process 28 nm 55 nm
Transistors 2540 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 2.0 x16
DirectX Version DirectX 11.0 DirectX 10.1
OpenGL Version OpenGL 4.3 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once again. If it uses 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher 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 number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka 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 of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GTX 660

Amazon.com

Check prices at:

Radeon HD 3470 256MB

Amazon.com

Check prices at:

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.

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