Radeon HD 7990 vs Radeon R5 M230

Intro

Compare all that to the Radeon R5 M230, which uses a 28 nm design. AMD has clocked the core frequency at 780 MHz. The DDR3 memory works at a speed of 1000 MHz on this card. It features 320 SPUs along with 20 Texture Address Units and 4 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7990		15520 points
Radeon R5 M230		1281 points
	Difference: 14239 (1112%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 7990 should be 3500% faster than the Radeon R5 M230 overall, due to its greater bandwidth. (explain)

Radeon HD 7990		576000 MB/sec
Radeon R5 M230		16000 MB/sec
	Difference: 560000 (3500%)

Texel Rate

The Radeon HD 7990 should be quite a bit (more or less 1459%) faster with regards to texture filtering than the Radeon R5 M230. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon R5 M230		15600 Mtexels/sec
	Difference: 227600 (1459%)

Pixel Rate

The Radeon HD 7990 is much (approximately 1849%) better at FSAA than the Radeon R5 M230, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon R5 M230		3120 Mpixels/sec
	Difference: 57680 (1849%)

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: Bandwidth is the max amount of information (counted in megabytes per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's 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 processed per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card 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 amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.