Radeon HD 4830 512MB vs Radeon R9 M395X

Intro

Compare all that to the Radeon R9 M395X, which features GPU core speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB		95 Watts
Radeon R9 M395X		125 Watts
	Difference: 30 Watts (32%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M395X should perform much faster than the Radeon HD 4830 512MB overall. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon HD 4830 512MB		57600 MB/sec
	Difference: 102400 (178%)

Texel Rate

The Radeon R9 M395X is much (about 403%) more effective at AF than the Radeon HD 4830 512MB. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon HD 4830 512MB		18400 Mtexels/sec
	Difference: 74144 (403%)

Pixel Rate

The Radeon R9 M395X should be quite a bit (more or less 151%) faster with regards to anti-aliasing than the Radeon HD 4830 512MB, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 M395X		23136 Mpixels/sec
Radeon HD 4830 512MB		9200 Mpixels/sec
	Difference: 13936 (151%)

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: Bandwidth is the largest amount of data (measured in MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.