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GeForce GTX 850M vs Radeon HD 4830 512MB

Intro

The GeForce GTX 850M makes use of a 28 nm design. nVidia has clocked the core frequency at 876 MHz. The DDR3 RAM is set to run at a frequency of 1000 MHz on this particular model. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon HD 4830 512MB, which has a clock speed of 575 MHz and a GDDR3 memory speed of 900 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It is made up of 640(128x5) SPUs, 32 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M 40 Watts
Radeon HD 4830 512MB 95 Watts
Difference: 55 Watts (138%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4830 512MB should perform quite a bit faster than the GeForce GTX 850M overall. (explain)

Radeon HD 4830 512MB 57600 MB/sec
GeForce GTX 850M 32000 MB/sec
Difference: 25600 (80%)

Texel Rate

The GeForce GTX 850M will be much (about 90%) more effective at AF than the Radeon HD 4830 512MB. (explain)

GeForce GTX 850M 35040 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 16640 (90%)

Pixel Rate

The GeForce GTX 850M will be a lot (more or less 52%) more effective at anti-aliasing than the Radeon HD 4830 512MB, and will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 850M 14016 Mpixels/sec
Radeon HD 4830 512MB 9200 Mpixels/sec
Difference: 4816 (52%)

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 850M

Amazon.com

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Radeon HD 4830 512MB

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 850M Radeon HD 4830 512MB
Manufacturer nVidia AMD
Year March 12 2014 Oct 21, 2008
Code Name GM107 RV770 LE
Memory 2048 MB 512 MB
Core Speed 876 MHz 575 MHz
Memory Speed 2000 MHz 1800 MHz
Power (Max TDP) 40 watts 95 watts
Bandwidth 32000 MB/sec 57600 MB/sec
Texel Rate 35040 Mtexels/sec 18400 Mtexels/sec
Pixel Rate 14016 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 640 640(128x5)
Texture Mapping Units 40 32
Render Output Units 16 16
Bus Type DDR3 GDDR3
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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR memory, 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units by the core clock 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. 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 many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 850M

Amazon.com

Check prices at:

Radeon HD 4830 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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