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GeForce GTX 960 vs Radeon HD 4850 X2 1GB

Intro

The GeForce GTX 960 uses a 28 nm design. nVidia has set the core frequency at 1127 MHz. The GDDR5 memory runs at a frequency of 1750 MHz on this model. It features 1024 SPUs along with 64 TAUs and 32 ROPs.

Compare all that to the Radeon HD 4850 X2 1GB, which comes with a GPU core clock speed of 625 MHz, and 1024 MB of GDDR3 RAM set to run at 993 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 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 1GB 250 Watts
Difference: 130 Watts (108%)

Memory Bandwidth

In theory, the Radeon HD 4850 X2 1GB is 13% faster than the GeForce GTX 960 in general, because of its greater data rate. (explain)

Radeon HD 4850 X2 1GB 127104 MB/sec
GeForce GTX 960 112000 MB/sec
Difference: 15104 (13%)

Texel Rate

The GeForce GTX 960 is much (approximately 44%) faster with regards to texture filtering than the Radeon HD 4850 X2 1GB. (explain)

GeForce GTX 960 72128 Mtexels/sec
Radeon HD 4850 X2 1GB 50000 Mtexels/sec
Difference: 22128 (44%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 960 is the winner, and very much so. (explain)

GeForce GTX 960 36064 Mpixels/sec
Radeon HD 4850 X2 1GB 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 1GB

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 1GB
Manufacturer nVidia AMD
Year January 2015 Nov 7, 2008
Code Name GM206 R700
Memory 2048 MB 1024 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 largest amount of data (measured in megabytes per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, 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 most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 960

Amazon.com

Check prices at:

Radeon HD 4850 X2 1GB

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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