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GeForce GTX 950 vs Radeon HD 4850 512MB

Intro

The GeForce GTX 950 features a clock frequency of 1024 MHz and a GDDR5 memory frequency of 1652 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It features 768 SPUs, 48 Texture Address Units, and 32 Raster Operation Units.

Compare those specifications to the Radeon HD 4850 512MB, which features core speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950 90 Watts
Radeon HD 4850 512MB 110 Watts
Difference: 20 Watts (22%)

Memory Bandwidth

Performance-wise, the GeForce GTX 950 should in theory be quite a bit better than the Radeon HD 4850 512MB in general. (explain)

GeForce GTX 950 105728 MB/sec
Radeon HD 4850 512MB 63552 MB/sec
Difference: 42176 (66%)

Texel Rate

The GeForce GTX 950 will be quite a bit (more or less 97%) more effective at anisotropic filtering than the Radeon HD 4850 512MB. (explain)

GeForce GTX 950 49152 Mtexels/sec
Radeon HD 4850 512MB 25000 Mtexels/sec
Difference: 24152 (97%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 950 is a better choice, by a large margin. (explain)

GeForce GTX 950 32768 Mpixels/sec
Radeon HD 4850 512MB 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

Check prices at:

Radeon HD 4850 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 950 Radeon HD 4850 512MB
Manufacturer nVidia AMD
Year August 2015 Jun 25, 2008
Code Name GM206 RV770 PRO
Memory 2048 MB 512 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 GDDR3
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 max amount of data (measured in megabytes per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 950

Amazon.com

Check prices at:

Radeon HD 4850 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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