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GeForce GTX 960 vs Radeon HD 4850 X2 512MB

Intro

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

Compare all of that to the Radeon HD 4850 X2 512MB, which comes with a core clock frequency of 625 MHz and a GDDR3 memory speed of 993 MHz. It also uses a 256-bit bus, and uses a 55 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 960 120 Watts
Radeon HD 4850 X2 512MB 250 Watts
Difference: 130 Watts (108%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4850 X2 512MB should be a small bit faster than the GeForce GTX 960 in general. (explain)

Radeon HD 4850 X2 512MB 127104 MB/sec
GeForce GTX 960 112000 MB/sec
Difference: 15104 (13%)

Texel Rate

The GeForce GTX 960 should be a lot (approximately 44%) better at texture filtering than the Radeon HD 4850 X2 512MB. (explain)

GeForce GTX 960 72128 Mtexels/sec
Radeon HD 4850 X2 512MB 50000 Mtexels/sec
Difference: 22128 (44%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 960 is a better choice, by a large margin. (explain)

GeForce GTX 960 36064 Mpixels/sec
Radeon HD 4850 X2 512MB 20000 Mpixels/sec
Difference: 16064 (80%)

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 4850 X2 512MB

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 4850 X2 512MB
Manufacturer nVidia AMD
Year January 2015 Nov 7, 2008
Code Name GM206 R700
Memory 2048 MB 512 MB (x2)
Core Speed 1127 MHz 625 MHz (x2)
Memory Speed 7000 MHz 1986 MHz (x2)
Power (Max TDP) 120 watts 250 watts
Bandwidth 112000 MB/sec 127104 MB/sec
Texel Rate 72128 Mtexels/sec 50000 Mtexels/sec
Pixel Rate 36064 Mpixels/sec 20000 Mpixels/sec
Unified Shaders 1024 800(160x5) (x2)
Texture Mapping Units 64 40 (x2)
Render Output Units 32 16 (x2)
Bus Type GDDR5 GDDR3
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 max amount of data (in units of megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core 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 output rate also depends on lots of other factors, especially the memory bandwidth - the lower the 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 4850 X2 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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