Radeon HD 4870 512MB vs Radeon R5 M330

Intro

Compare all of that to the Radeon R5 M330, which features a clock frequency of 1030 MHz and a DDR3 memory frequency of 900 MHz. It also features a 64-bit memory bus, and makes use of a 28 nm design. It features 320 SPUs, 20 Texture Address Units, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 512MB will be 700% faster than the Radeon R5 M330 in general, due to its higher bandwidth. (explain)

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

Texel Rate

The Radeon HD 4870 512MB should be a lot (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 a high screen resolution is important to you, then the Radeon HD 4870 512MB is the winner, by a large margin. (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: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, 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 calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics 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 Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.