Radeon HD 4730 vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which features clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
Radeon HD 4730		140 Watts
	Difference: 15 Watts (12%)

Memory Bandwidth

In theory, the Radeon R9 M390X should be quite a bit faster than the Radeon HD 4730 in general. (explain)

Radeon R9 M390X		160000 MB/sec
Radeon HD 4730		57600 MB/sec
	Difference: 102400 (178%)

Texel Rate

The Radeon R9 M390X is much (about 313%) faster with regards to AF than the Radeon HD 4730. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon HD 4730		22400 Mtexels/sec
	Difference: 70144 (313%)

Pixel Rate

The Radeon R9 M390X should be a lot (about 313%) faster with regards to full screen anti-aliasing than the Radeon HD 4730, and capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 M390X		23136 Mpixels/sec
Radeon HD 4730		5600 Mpixels/sec
	Difference: 17536 (313%)

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 information (measured in megabytes per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units of the card 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends 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.