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GeForce GTX 870M vs Radeon HD 4850 1GB

Intro

The GeForce GTX 870M makes use of a 28 nm design. nVidia has set the core frequency at 941 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this card. It features 1344 SPUs along with 112 Texture Address Units and 24 Rasterization Operator Units.

Compare those specifications to the Radeon HD 4850 1GB, which has clock speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR4 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically speaking, the GeForce GTX 870M should perform much faster 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 a lot (more or less 322%) faster with regards to texture 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

The GeForce GTX 870M is a lot (approximately 126%) better at anti-aliasing than the Radeon HD 4850 1GB, and should be able to handle higher screen resolutions more effectively. (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: Bandwidth is the max amount of data (counted in MB per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max 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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