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GeForce GTX 860M vs Radeon HD 4850 1GB

Intro

The GeForce GTX 860M uses a 28 nm design. nVidia has clocked the core speed at 797 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this particular model. It features 1152 SPUs as well as 96 Texture Address Units and 16 ROPs.

Compare that to the Radeon HD 4850 1GB, which has core clock speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR4 memory. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M 45 Watts
Radeon HD 4850 1GB 110 Watts
Difference: 65 Watts (144%)

Memory Bandwidth

The GeForce GTX 860M, in theory, should perform a small bit faster than the Radeon HD 4850 1GB overall. (explain)

GeForce GTX 860M 64000 MB/sec
Radeon HD 4850 1GB 63552 MB/sec
Difference: 448 (1%)

Texel Rate

The GeForce GTX 860M should be quite a bit (about 206%) better at texture filtering than the Radeon HD 4850 1GB. (explain)

GeForce GTX 860M 76512 Mtexels/sec
Radeon HD 4850 1GB 25000 Mtexels/sec
Difference: 51512 (206%)

Pixel Rate

The GeForce GTX 860M is quite a bit (approximately 28%) faster with regards to FSAA than the Radeon HD 4850 1GB, and also capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 860M 12752 Mpixels/sec
Radeon HD 4850 1GB 10000 Mpixels/sec
Difference: 2752 (28%)

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 860M

Amazon.com

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Radeon HD 4850 1GB

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 860M Radeon HD 4850 1GB
Manufacturer nVidia AMD
Year March 12 2014 Jun 25, 2008
Code Name GM107 RV770 PRO
Memory 4096 MB 1024 MB
Core Speed 797 MHz 625 MHz
Memory Speed 4000 MHz 1986 MHz
Power (Max TDP) 45 watts 110 watts
Bandwidth 64000 MB/sec 63552 MB/sec
Texel Rate 76512 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 12752 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 1152 800(160x5)
Texture Mapping Units 96 40
Render Output Units 16 16
Bus Type GDDR5 GDDR4
Bus Width 128-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 largest amount of data (in units of megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce GTX 860M

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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