Radeon HD 4650 1GB vs Radeon R5 M330

Intro

Compare all of that to the Radeon R5 M330, which comes with GPU core speed of 1030 MHz, and 2048 MB of DDR3 memory running at 900 MHz through a 64-bit bus. It also is made up of 320 SPUs, 20 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 4650 1GB should in theory be quite a bit better than the Radeon R5 M330 overall. (explain)

Radeon HD 4650 1GB		22400 MB/sec
Radeon R5 M330		14400 MB/sec
	Difference: 8000 (56%)

Texel Rate

The Radeon R5 M330 is just a bit (approximately 7%) faster with regards to texture filtering than the Radeon HD 4650 1GB. (explain)

Radeon R5 M330		20600 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 1400 (7%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R5 M330 is the winner, and very much so. (explain)

Radeon R5 M330		8240 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 3440 (72%)

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 information (counted in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.