Radeon HD 7990 vs Radeon R5 M330

Intro

Compare all of that to the Radeon R5 M330, which has core clock speeds of 1030 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 RAM. It features 320 SPUs as well as 20 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 7990 should perform quite a bit faster than the Radeon R5 M330 overall. (explain)

Radeon HD 7990		576000 MB/sec
Radeon R5 M330		14400 MB/sec
	Difference: 561600 (3900%)

Texel Rate

The Radeon HD 7990 is much (approximately 1081%) more effective at anisotropic filtering than the Radeon R5 M330. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon R5 M330		20600 Mtexels/sec
	Difference: 222600 (1081%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7990 is superior to the Radeon R5 M330, and very much so. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon R5 M330		8240 Mpixels/sec
	Difference: 52560 (638%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units by the core 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core 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 rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.