Radeon HD 3690/3830 vs Radeon R5 M330

Intro

Compare all that to the Radeon R5 M330, which comes with clock speeds of 1030 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 memory. It features 320 SPUs along with 20 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 3690/3830 will be 84% quicker than the Radeon R5 M330 in general, because of its higher bandwidth. (explain)

Radeon HD 3690/3830		26496 MB/sec
Radeon R5 M330		14400 MB/sec
	Difference: 12096 (84%)

Texel Rate

The Radeon R5 M330 will be a lot (about 93%) better at anisotropic filtering than the Radeon HD 3690/3830. (explain)

Radeon R5 M330		20600 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 9912 (93%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 3690/3830 is a better choice, by a large margin. (explain)

Radeon HD 3690/3830		10688 Mpixels/sec
Radeon R5 M330		8240 Mpixels/sec
	Difference: 2448 (30%)

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 (measured in megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, the result should 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.