Radeon HD 5830 vs Radeon R9 M270X

Intro

Compare those specifications to the Radeon R9 M270X, which uses a 28 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR5 memory works at a frequency of 1125 MHz on this model. It features 640 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 5830 should theoretically perform much faster than the Radeon R9 M270X in general. (explain)

Radeon HD 5830		128000 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 56000 (78%)

Texel Rate

The Radeon HD 5830 will be much (approximately 54%) faster with regards to texture filtering than the Radeon R9 M270X. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon R9 M270X		29000 Mtexels/sec
	Difference: 15800 (54%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 5830 is a better choice, but not by far. (explain)

Radeon HD 5830		12800 Mpixels/sec
Radeon R9 M270X		11600 Mpixels/sec
	Difference: 1200 (10%)

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 maximum amount of data (counted in MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the card's clock speed. 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 also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.