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GeForce GTX 960 vs Radeon HD 4870 X2

Intro

The GeForce GTX 960 has a clock frequency of 1127 MHz and a GDDR5 memory speed of 1750 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is comprised of 1024 SPUs, 64 TAUs, and 32 Raster Operation Units.

Compare those specs to the Radeon HD 4870 X2, which features a clock frequency of 750 MHz and a GDDR5 memory speed of 900 MHz. It also features a 256-bit bus, and uses a 55 nm design. It is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 960 120 Watts
Radeon HD 4870 X2 350 Watts
Difference: 230 Watts (192%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 X2 should perform a lot faster than the GeForce GTX 960 overall. (explain)

Radeon HD 4870 X2 230400 MB/sec
GeForce GTX 960 112000 MB/sec
Difference: 118400 (106%)

Texel Rate

The GeForce GTX 960 should be a small bit (approximately 20%) better at anisotropic filtering than the Radeon HD 4870 X2. (explain)

GeForce GTX 960 72128 Mtexels/sec
Radeon HD 4870 X2 60000 Mtexels/sec
Difference: 12128 (20%)

Pixel Rate

The GeForce GTX 960 should be quite a bit (approximately 50%) better at AA than the Radeon HD 4870 X2, and also will be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 960 36064 Mpixels/sec
Radeon HD 4870 X2 24000 Mpixels/sec
Difference: 12064 (50%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 960

Amazon.com

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Radeon HD 4870 X2

Amazon.com

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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 960 Radeon HD 4870 X2
Manufacturer nVidia AMD
Year January 2015 Aug 12, 2008
Code Name GM206 R700
Memory 2048 MB 1024 MB (x2)
Core Speed 1127 MHz 750 MHz (x2)
Memory Speed 7000 MHz 3600 MHz (x2)
Power (Max TDP) 120 watts 350 watts
Bandwidth 112000 MB/sec 230400 MB/sec
Texel Rate 72128 Mtexels/sec 60000 Mtexels/sec
Pixel Rate 36064 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 1024 800(160x5) (x2)
Texture Mapping Units 64 40 (x2)
Render Output Units 32 16 (x2)
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit (x2)
Fab Process 28 nm 55 nm
Transistors 2940 million 956 million
Bus PCIe 3.0 x16 PCIe 2.0 x16 (PCIe bridge)
DirectX Version DirectX 12.0 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR 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 better 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 processed per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core 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 rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX 960

Amazon.com

Check prices at:

Radeon HD 4870 X2

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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