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GeForce GTX 870M vs Radeon HD 4830 1GB

Intro

The GeForce GTX 870M comes with a core clock speed of 941 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 192-bit memory bus, and makes use of a 28 nm design. It is made up of 1344 SPUs, 112 Texture Address Units, and 24 ROPs.

Compare those specs to the Radeon HD 4830 1GB, which comes with a core clock frequency of 575 MHz and a GDDR4 memory frequency of 900 MHz. It also uses a 256-bit memory bus, and makes use of a 55 nm design. It features 640(128x5) SPUs, 32 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 1GB 95 Watts
GeForce GTX 870M 110 Watts
Difference: 15 Watts (16%)

Memory Bandwidth

In theory, the GeForce GTX 870M should perform much faster than the Radeon HD 4830 1GB overall. (explain)

GeForce GTX 870M 96000 MB/sec
Radeon HD 4830 1GB 57600 MB/sec
Difference: 38400 (67%)

Texel Rate

The GeForce GTX 870M will be a lot (approximately 473%) faster with regards to AF than the Radeon HD 4830 1GB. (explain)

GeForce GTX 870M 105392 Mtexels/sec
Radeon HD 4830 1GB 18400 Mtexels/sec
Difference: 86992 (473%)

Pixel Rate

The GeForce GTX 870M should be a lot (about 145%) more effective at anti-aliasing than the Radeon HD 4830 1GB, and also will be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 870M 22584 Mpixels/sec
Radeon HD 4830 1GB 9200 Mpixels/sec
Difference: 13384 (145%)

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

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Radeon HD 4830 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 870M Radeon HD 4830 1GB
Manufacturer nVidia AMD
Year March 12 2014 Oct 21, 2008
Code Name GK104 RV770 LE
Memory 3072 MB 1024 MB
Core Speed 941 MHz 575 MHz
Memory Speed 4000 MHz 1800 MHz
Power (Max TDP) 110 watts 95 watts
Bandwidth 96000 MB/sec 57600 MB/sec
Texel Rate 105392 Mtexels/sec 18400 Mtexels/sec
Pixel Rate 22584 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 1344 640(128x5)
Texture Mapping Units 112 32
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 largest amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 can be processed in one second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX 870M

Amazon.com

Check prices at:

Radeon HD 4830 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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