Radeon R5 M330 vs Radeon R9 390 8G

Intro

Compare all of that to the Radeon R9 390 8G, which features GPU core speed of 1000 MHz, and 8192 MB of GDDR5 memory set to run at 1500 MHz through a 512-bit bus. It also is comprised of 2560 Stream Processors, 160 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 390 8G should be 2567% faster than the Radeon R5 M330 in general, due to its greater data rate. (explain)

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

Texel Rate

The Radeon R9 390 8G will be a lot (approximately 677%) more effective at AF 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 a high screen resolution is important to you, then the Radeon R9 390 8G is a better choice, and very much so. (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 maximum amount of information (measured in megabytes per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory per 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 - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.