GeForce GTX 980M vs Radeon HD 5770

Intro

Compare those specifications to the Radeon HD 5770, which comes with a core clock frequency of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
Radeon HD 5770		108 Watts
	Difference: 8 Watts (8%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 980M should in theory be much better than the Radeon HD 5770 overall. (explain)

GeForce GTX 980M		128000 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 51200 (67%)

Texel Rate

The GeForce GTX 980M is a lot (about 193%) faster with regards to texture filtering than the Radeon HD 5770. (explain)

GeForce GTX 980M		99648 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 65648 (193%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 980M is a better choice, by far. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 52832 (388%)

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: Bandwidth is the largest amount of data (measured in MB per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling 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 chip can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.