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GeForce GTX 960 vs Radeon HD 4850 X2 1GB

Intro

The GeForce GTX 960 makes use of a 28 nm design. nVidia has set the core speed at 1127 MHz. The GDDR5 memory runs at a speed of 1750 MHz on this specific card. It features 1024 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator Units.

Compare those specifications to the Radeon HD 4850 X2 1GB, which has core speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR3 RAM. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

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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

Performance-wise, the Radeon HD 4850 X2 1GB should theoretically be a bit better than the GeForce GTX 960 overall. (explain)

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

Texel Rate

The GeForce GTX 960 should be a lot (more or less 44%) more effective at AF 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

The GeForce GTX 960 is much (approximately 80%) more effective at FSAA than the Radeon HD 4850 X2 1GB, and also capable of handling higher screen resolutions without slowing down too much. (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

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.

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 max amount of information (measured in megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the 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 number of 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably 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 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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