Radeon HD 5770 vs Radeon R9 M395X

Intro

Compare those specifications to the Radeon R9 M395X, which has a clock frequency of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
Radeon R9 M395X		125 Watts
	Difference: 17 Watts (16%)

Memory Bandwidth

In theory, the Radeon R9 M395X should perform much faster than the Radeon HD 5770 overall. (explain)

Radeon R9 M395X		160000 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 83200 (108%)

Texel Rate

The Radeon R9 M395X will be much (about 172%) better at AF than the Radeon HD 5770. (explain)

Radeon R9 M395X		92544 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 58544 (172%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 M395X is a better choice, and very much so. (explain)

Radeon R9 M395X		23136 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 9536 (70%)

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 MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's interface 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 memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.