GeForce GTX 970M vs Radeon HD 5770

Intro

Compare all that to the Radeon HD 5770, which makes use of a 40 nm design. AMD has set the core speed at 850 MHz. The GDDR5 memory works at a speed of 1200 MHz on this model. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 970M		75 Watts
Radeon HD 5770		108 Watts
	Difference: 33 Watts (44%)

Memory Bandwidth

Performance-wise, the GeForce GTX 970M should theoretically be much better than the Radeon HD 5770 in general. (explain)

GeForce GTX 970M		96000 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 19200 (25%)

Texel Rate

The GeForce GTX 970M is much (more or less 117%) more effective at texture filtering than the Radeon HD 5770. (explain)

GeForce GTX 970M		73920 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 39920 (117%)

Pixel Rate

The GeForce GTX 970M should be quite a bit (more or less 226%) more effective at full screen anti-aliasing than the Radeon HD 5770, and also will be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 970M		44352 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 30752 (226%)

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 information (counted in MB per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, 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 number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core 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 fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.