Radeon HD 6990 vs Radeon R5 M330

Intro

Compare that to the Radeon R5 M330, which has GPU core speed of 1030 MHz, and 2048 MB of DDR3 RAM 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

Theoretically speaking, the Radeon HD 6990 will be 2122% faster than the Radeon R5 M330 overall, because of its higher data rate. (explain)

Radeon HD 6990		320000 MB/sec
Radeon R5 M330		14400 MB/sec
	Difference: 305600 (2122%)

Texel Rate

The Radeon HD 6990 should be quite a bit (about 674%) faster with regards to AF than the Radeon R5 M330. (explain)

Radeon HD 6990		159360 Mtexels/sec
Radeon R5 M330		20600 Mtexels/sec
	Difference: 138760 (674%)

Pixel Rate

The Radeon HD 6990 should be much (approximately 545%) more effective at FSAA than the Radeon R5 M330, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 6990		53120 Mpixels/sec
Radeon R5 M330		8240 Mpixels/sec
	Difference: 44880 (545%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of 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 speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate 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 drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.