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GeForce 930M vs Radeon HD 4870 1GB

Intro

The GeForce 930M comes with clock speeds of 928 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 memory. It features 384 SPUs along with 24 TAUs and 8 ROPs.

Compare those specs to the Radeon HD 4870 1GB, which features a GPU core clock speed of 750 MHz, and 1024 MB of GDDR5 RAM set to run at 900 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4870 1GB should in theory perform quite a bit faster than the GeForce 930M in general. (explain)

Radeon HD 4870 1GB 115200 MB/sec
GeForce 930M 14400 MB/sec
Difference: 100800 (700%)

Texel Rate

The Radeon HD 4870 1GB will be a lot (more or less 35%) more effective at anisotropic filtering than the GeForce 930M. (explain)

Radeon HD 4870 1GB 30000 Mtexels/sec
GeForce 930M 22272 Mtexels/sec
Difference: 7728 (35%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 4870 1GB is superior to the GeForce 930M, by far. (explain)

Radeon HD 4870 1GB 12000 Mpixels/sec
GeForce 930M 7424 Mpixels/sec
Difference: 4576 (62%)

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 930M

Amazon.com

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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 930M Radeon HD 4870 1GB
Manufacturer nVidia AMD
Year March 12 2015 Jun 25, 2008
Code Name GM108 RV770 XT
Memory 2048 MB 1024 MB
Core Speed 928 MHz 750 MHz
Memory Speed 1800 MHz 3600 MHz
Power (Max TDP) (Unknown) watts 150 watts
Bandwidth 14400 MB/sec 115200 MB/sec
Texel Rate 22272 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 7424 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 384 800(160x5)
Texture Mapping Units 24 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: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's 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 is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce 930M

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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