Radeon R5 M330 vs Radeon R9 390 8G

Intro

Compare those specs to the Radeon R9 390 8G, which has a clock speed of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 512-bit bus, and uses a 28 nm design. It features 2560 SPUs, 160 TAUs, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon R9 390 8G should in theory be a lot better than the Radeon R5 M330 in general. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon R5 M330		14400 MB/sec
	Difference: 369600 (2567%)

Texel Rate

The Radeon R9 390 8G is quite a bit (about 677%) better at texture filtering than the Radeon R5 M330. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon R5 M330		20600 Mtexels/sec
	Difference: 139400 (677%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 390 8G is the winner, by far. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon R5 M330		8240 Mpixels/sec
	Difference: 55760 (677%)

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 max amount of information (in units of megabytes per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number 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 speed of the chip. The higher the texel rate, the better the 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 most pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.