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GeForce 830M vs Radeon R9 390 8G

Intro

The GeForce 830M features a GPU core speed of 1029 MHz, and the 2048 MB of DDR3 RAM is set to run at 900 MHz through a 64-bit bus. It also features 256 Stream Processors, 16 TAUs, and 8 Raster Operation Units.

Compare all of that to the Radeon R9 390 8G, which makes use of a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 memory works at a frequency of 1500 MHz on this specific model. It features 2560 SPUs as well as 160 Texture Address Units and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M 25 Watts
Radeon R9 390 8G 275 Watts
Difference: 250 Watts (1000%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390 8G is 2567% faster than the GeForce 830M in general, because of its higher data rate. (explain)

Radeon R9 390 8G 384000 MB/sec
GeForce 830M 14400 MB/sec
Difference: 369600 (2567%)

Texel Rate

The Radeon R9 390 8G is much (about 872%) better at texture filtering than the GeForce 830M. (explain)

Radeon R9 390 8G 160000 Mtexels/sec
GeForce 830M 16464 Mtexels/sec
Difference: 143536 (872%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 390 8G is superior to the GeForce 830M, and very much so. (explain)

Radeon R9 390 8G 64000 Mpixels/sec
GeForce 830M 8232 Mpixels/sec
Difference: 55768 (677%)

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 R9 390 8G

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 R9 390 8G
Manufacturer nVidia AMD
Year March 12 2014 June 2015
Code Name GM108 Grenada PRO
Memory 2048 MB 8192 MB
Core Speed 1029 MHz 1000 MHz
Memory Speed 1800 MHz 6000 MHz
Power (Max TDP) 25 watts 275 watts
Bandwidth 14400 MB/sec 384000 MB/sec
Texel Rate 16464 Mtexels/sec 160000 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 64000 Mpixels/sec
Unified Shaders 256 2560
Texture Mapping Units 16 160
Render Output Units 8 64
Bus Type DDR3 GDDR5
Bus Width 64-bit 512-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million 6200 million
Bus PCIe 3.0 x16 PCIe 3.0 ×16
DirectX Version DirectX 12 DirectX 12.0
OpenGL Version OpenGL 4.5 OpenGL 4.5

Memory Bandwidth: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the video 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 the video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce 830M

Amazon.com

Check prices at:

Radeon R9 390 8G

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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