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GeForce GTX 660 Ti vs Radeon HD 4870 512MB

Intro

The GeForce GTX 660 Ti has a GPU core speed of 915 MHz, and the 2048 MB of GDDR5 RAM runs at 1500 MHz through a 192-bit bus. It also features 1344 SPUs, 112 Texture Address Units, and 24 Raster Operation Units.

Compare those specifications to the Radeon HD 4870 512MB, which has GPU core speed of 750 MHz, and 512 MB of GDDR5 RAM set to run at 900 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

The GeForce GTX 660 Ti, in theory, should perform quite a bit faster than the Radeon HD 4870 512MB in general. (explain)

GeForce GTX 660 Ti 144000 MB/sec
Radeon HD 4870 512MB 115200 MB/sec
Difference: 28800 (25%)

Texel Rate

The GeForce GTX 660 Ti should be a lot (more or less 242%) better at AF than the Radeon HD 4870 512MB. (explain)

GeForce GTX 660 Ti 102480 Mtexels/sec
Radeon HD 4870 512MB 30000 Mtexels/sec
Difference: 72480 (242%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 660 Ti is superior to the Radeon HD 4870 512MB, by far. (explain)

GeForce GTX 660 Ti 21960 Mpixels/sec
Radeon HD 4870 512MB 12000 Mpixels/sec
Difference: 9960 (83%)

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

Display Prices

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GeForce GTX 660 Ti

Amazon.com

Check prices at:

Radeon HD 4870 512MB

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

Display Specifications

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Model GeForce GTX 660 Ti Radeon HD 4870 512MB
Manufacturer nVidia AMD
Year August 2012 Jun 25, 2008
Code Name GK104 RV770 XT
Memory 2048 MB 512 MB
Core Speed 915 MHz 750 MHz
Memory Speed 6000 MHz 3600 MHz
Power (Max TDP) 150 watts 150 watts
Bandwidth 144000 MB/sec 115200 MB/sec
Texel Rate 102480 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 21960 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 1344 800(160x5)
Texture Mapping Units 112 40
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 28 nm 55 nm
Transistors 3540 million 956 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: Bandwidth is the largest amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in one 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 - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant 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.

Display Prices

Hide Prices

GeForce GTX 660 Ti

Amazon.com

Check prices at:

Radeon HD 4870 512MB

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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