Radeon HD 4870 2GB vs Radeon R5 M330

Intro

Compare those specifications to the Radeon R5 M330, which makes use of a 28 nm design. AMD has set the core frequency at 1030 MHz. The DDR3 memory runs at a frequency of 900 MHz on this specific model. It features 320 SPUs along with 20 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4870 2GB, in theory, should perform quite a bit faster than the Radeon R5 M330 overall. (explain)

Radeon HD 4870 2GB		115200 MB/sec
Radeon R5 M330		14400 MB/sec
	Difference: 100800 (700%)

Texel Rate

The Radeon HD 4870 2GB will be much (about 46%) more effective at texture filtering than the Radeon R5 M330. (explain)

Radeon HD 4870 2GB		30000 Mtexels/sec
Radeon R5 M330		20600 Mtexels/sec
	Difference: 9400 (46%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 4870 2GB is a better choice, by a large margin. (explain)

Radeon HD 4870 2GB		12000 Mpixels/sec
Radeon R5 M330		8240 Mpixels/sec
	Difference: 3760 (46%)

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 (counted in megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core 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 quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.