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GeForce GTX 870M vs Radeon HD 4850 1GB

Intro

The GeForce GTX 870M has a GPU clock speed of 941 MHz, and the 3072 MB of GDDR5 memory runs at 1000 MHz through a 192-bit bus. It also is made up of 1344 SPUs, 112 TAUs, and 24 Raster Operation Units.

Compare those specs to the Radeon HD 4850 1GB, which makes use of a 55 nm design. AMD has set the core frequency at 625 MHz. The GDDR4 memory is set to run at a speed of 993 MHz on this specific model. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

As far as performance goes, the GeForce GTX 870M should in theory be quite a bit better than the Radeon HD 4850 1GB in general. (explain)

GeForce GTX 870M 96000 MB/sec
Radeon HD 4850 1GB 63552 MB/sec
Difference: 32448 (51%)

Texel Rate

The GeForce GTX 870M will be quite a bit (approximately 322%) better at anisotropic filtering than the Radeon HD 4850 1GB. (explain)

GeForce GTX 870M 105392 Mtexels/sec
Radeon HD 4850 1GB 25000 Mtexels/sec
Difference: 80392 (322%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 870M is the winner, by far. (explain)

GeForce GTX 870M 22584 Mpixels/sec
Radeon HD 4850 1GB 10000 Mpixels/sec
Difference: 12584 (126%)

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 870M

Amazon.com

Check prices at:

Radeon HD 4850 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 870M Radeon HD 4850 1GB
Manufacturer nVidia AMD
Year March 12 2014 Jun 25, 2008
Code Name GK104 RV770 PRO
Memory 3072 MB 1024 MB
Core Speed 941 MHz 625 MHz
Memory Speed 4000 MHz 1986 MHz
Power (Max TDP) 110 watts 110 watts
Bandwidth 96000 MB/sec 63552 MB/sec
Texel Rate 105392 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 22584 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 1344 800(160x5)
Texture Mapping Units 112 40
Render Output Units 24 16
Bus Type GDDR5 GDDR4
Bus Width 192-bit 256-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million 956 million
Bus PCIe 3.0 x16 PCIe 2.0 x16
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. 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 faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount 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 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 video card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number 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 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

Hide Prices

GeForce GTX 870M

Amazon.com

Check prices at:

Radeon HD 4850 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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