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GeForce 830M vs Radeon HD 4870 1GB

Intro

The GeForce 830M comes with a core clock frequency of 1029 MHz and a DDR3 memory frequency of 900 MHz. It also features a 64-bit memory bus, and uses a 28 nm design. It features 256 SPUs, 16 TAUs, and 8 ROPs.

Compare all that to the Radeon HD 4870 1GB, which has GPU core speed of 750 MHz, and 1024 MB of GDDR5 RAM set to run at 900 MHz through a 256-bit bus. It also is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M 25 Watts
Radeon HD 4870 1GB 150 Watts
Difference: 125 Watts (500%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 1GB should perform quite a bit faster than the GeForce 830M in general. (explain)

Radeon HD 4870 1GB 115200 MB/sec
GeForce 830M 14400 MB/sec
Difference: 100800 (700%)

Texel Rate

The Radeon HD 4870 1GB will be a lot (approximately 82%) faster with regards to AF than the GeForce 830M. (explain)

Radeon HD 4870 1GB 30000 Mtexels/sec
GeForce 830M 16464 Mtexels/sec
Difference: 13536 (82%)

Pixel Rate

The Radeon HD 4870 1GB is a lot (more or less 46%) more effective at anti-aliasing than the GeForce 830M, and should be capable of handling higher resolutions more effectively. (explain)

Radeon HD 4870 1GB 12000 Mpixels/sec
GeForce 830M 8232 Mpixels/sec
Difference: 3768 (46%)

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 830M

Amazon.com

Check prices at:

Radeon HD 4870 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 830M Radeon HD 4870 1GB
Manufacturer nVidia AMD
Year March 12 2014 Jun 25, 2008
Code Name GM108 RV770 XT
Memory 2048 MB 1024 MB
Core Speed 1029 MHz 750 MHz
Memory Speed 1800 MHz 3600 MHz
Power (Max TDP) 25 watts 150 watts
Bandwidth 14400 MB/sec 115200 MB/sec
Texel Rate 16464 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 256 800(160x5)
Texture Mapping Units 16 40
Render Output Units 8 16
Bus Type DDR3 GDDR5
Bus Width 64-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 largest amount of data (in units of megabytes per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range 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 calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 830M

Amazon.com

Check prices at:

Radeon HD 4870 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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