Radeon HD 4870 512MB vs Radeon R5 M330

Intro

Compare all of that to the Radeon R5 M330, which uses a 28 nm design. AMD has set the core frequency at 1030 MHz. The DDR3 RAM runs at a speed of 900 MHz on this model. 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 4870 512MB should perform a lot faster than the Radeon R5 M330 overall. (explain)

Radeon HD 4870 512MB		115200 MB/sec
Radeon R5 M330		14400 MB/sec
	Difference: 100800 (700%)

Texel Rate

The Radeon HD 4870 512MB is much (approximately 46%) better at texture filtering than the Radeon R5 M330. (explain)

Radeon HD 4870 512MB		30000 Mtexels/sec
Radeon R5 M330		20600 Mtexels/sec
	Difference: 9400 (46%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4870 512MB is a better choice, and very much so. (explain)

Radeon HD 4870 512MB		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 (in units of megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 amount of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video 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 most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.