Radeon HD 4830 1GB vs Radeon R9 M395X

Intro

Compare all of that to the Radeon R9 M395X, which features a core clock speed of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 256-bit bus, and uses a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 1GB		95 Watts
Radeon R9 M395X		125 Watts
	Difference: 30 Watts (32%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M395X is 178% quicker than the Radeon HD 4830 1GB in general, due to its greater bandwidth. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 102400 (178%)

Texel Rate

The Radeon R9 M395X will be a lot (more or less 403%) faster with regards to anisotropic filtering than the Radeon HD 4830 1GB. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 74144 (403%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M395X is superior to the Radeon HD 4830 1GB, by a large margin. (explain)

Radeon R9 M395X		23136 Mpixels/sec
Radeon HD 4830 1GB		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 information (in units of MB per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.