GeForce 830M vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which uses a 28 nm design. AMD has clocked the core frequency at 723 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this specific card. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Radeon R9 M390X		125 Watts
	Difference: 100 Watts (400%)

Memory Bandwidth

Performance-wise, the Radeon R9 M390X should theoretically be a lot superior to the GeForce 830M overall. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 145600 (1011%)

Texel Rate

The Radeon R9 M390X should be a lot (approximately 462%) more effective at texture filtering than the GeForce 830M. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 76080 (462%)

Pixel Rate

The Radeon R9 M390X will be quite a bit (approximately 181%) more effective at full screen anti-aliasing than the GeForce 830M, and also will be able to handle higher screen resolutions better. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 14904 (181%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, 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 chip can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.