Radeon HD 7870 XT vs Radeon R5 M330

Intro

Compare those specs to the Radeon R5 M330, which makes use of a 28 nm design. AMD has set the core speed at 1030 MHz. The DDR3 memory runs at a speed of 900 MHz on this card. It features 320 SPUs as well as 20 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 7870 XT, in theory, should be much faster than the Radeon R5 M330 overall. (explain)

Radeon HD 7870 XT		192000 MB/sec
Radeon R5 M330		14400 MB/sec
	Difference: 177600 (1233%)

Texel Rate

The Radeon HD 7870 XT is quite a bit (approximately 331%) more effective at AF than the Radeon R5 M330. (explain)

Radeon HD 7870 XT		88800 Mtexels/sec
Radeon R5 M330		20600 Mtexels/sec
	Difference: 68200 (331%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7870 XT is superior to the Radeon R5 M330, by far. (explain)

Radeon HD 7870 XT		29600 Mpixels/sec
Radeon R5 M330		8240 Mpixels/sec
	Difference: 21360 (259%)

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 megabytes per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 amount of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

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