GeForce GTX 980M vs Radeon HD 5670

Intro

Compare those specifications to the Radeon HD 5670, which uses a 40 nm design. AMD has clocked the core frequency at 775 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this card. It features 400(80x5) SPUs as well as 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
GeForce GTX 980M		100 Watts
	Difference: 39 Watts (64%)

Memory Bandwidth

In theory, the GeForce GTX 980M will be 100% faster than the Radeon HD 5670 overall, because of its greater data rate. (explain)

GeForce GTX 980M		128000 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 64000 (100%)

Texel Rate

The GeForce GTX 980M is much (more or less 543%) better at texture filtering than the Radeon HD 5670. (explain)

GeForce GTX 980M		99648 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 84148 (543%)

Pixel Rate

The GeForce GTX 980M should be much (more or less 971%) more effective at FSAA than the Radeon HD 5670, and will be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 60232 (971%)

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 largest amount of data (counted in megabytes per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the graphics 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 maximum amount of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.