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GeForce GTX 960 vs Radeon HD 4850 X2 512MB

Intro

The GeForce GTX 960 comes with a GPU core clock speed of 1127 MHz, and the 2048 MB of GDDR5 RAM is set to run at 1750 MHz through a 128-bit bus. It also is made up of 1024 SPUs, 64 TAUs, and 32 ROPs.

Compare that to the Radeon HD 4850 X2 512MB, which comes with clock speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 memory. It features 800(160x5) SPUs as well as 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

In theory, the Radeon HD 4850 X2 512MB should be just a bit faster than the GeForce GTX 960 overall. (explain)

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

Texel Rate

The GeForce GTX 960 will be much (more or less 44%) more effective 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

The GeForce GTX 960 will be a lot (approximately 80%) better at FSAA than the Radeon HD 4850 X2 512MB, and will be able to handle higher resolutions more effectively. (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

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.

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 largest amount of information (counted in MB per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip 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 number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on 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 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 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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