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GeForce GTX 950 vs Radeon HD 4850 2GB

Intro

The GeForce GTX 950 has a GPU core speed of 1024 MHz, and the 2048 MB of GDDR5 RAM is set to run at 1652 MHz through a 128-bit bus. It also is comprised of 768 Stream Processors, 48 Texture Address Units, and 32 Raster Operation Units.

Compare all of that to the Radeon HD 4850 2GB, which features core speeds of 625 MHz on the GPU, and 993 MHz on the 2048 MB of GDDR4 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950 90 Watts
Radeon HD 4850 2GB 110 Watts
Difference: 20 Watts (22%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 950 should be 66% quicker than the Radeon HD 4850 2GB overall, due to its higher data rate. (explain)

GeForce GTX 950 105728 MB/sec
Radeon HD 4850 2GB 63552 MB/sec
Difference: 42176 (66%)

Texel Rate

The GeForce GTX 950 should be a lot (more or less 97%) better at texture filtering than the Radeon HD 4850 2GB. (explain)

GeForce GTX 950 49152 Mtexels/sec
Radeon HD 4850 2GB 25000 Mtexels/sec
Difference: 24152 (97%)

Pixel Rate

The GeForce GTX 950 is much (more or less 228%) more effective at AA than the Radeon HD 4850 2GB, and able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 950 32768 Mpixels/sec
Radeon HD 4850 2GB 10000 Mpixels/sec
Difference: 22768 (228%)

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.

Price Comparison

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GeForce GTX 950

Amazon.com

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Radeon HD 4850 2GB

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 950 Radeon HD 4850 2GB
Manufacturer nVidia AMD
Year August 2015 Jun 25, 2008
Code Name GM206 RV770 PRO
Memory 2048 MB 2048 MB
Core Speed 1024 MHz 625 MHz
Memory Speed 6608 MHz 1986 MHz
Power (Max TDP) 90 watts 110 watts
Bandwidth 105728 MB/sec 63552 MB/sec
Texel Rate 49152 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 32768 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 768 800(160x5)
Texture Mapping Units 48 40
Render Output Units 32 16
Bus Type GDDR5 GDDR4
Bus Width 128-bit 256-bit
Fab Process 28 nm 55 nm
Transistors 2940 million 956 million
Bus PCIe 3.0 x16 PCIe 2.0 x16
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 (measured in megabytes per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units of the card by the core 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill 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 reach the maximum fill rate.

Display Prices

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GeForce GTX 950

Amazon.com

Check prices at:

Radeon HD 4850 2GB

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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