GeForce GTX 860M vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which has a clock frequency of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M		45 Watts
Radeon HD 5770		108 Watts
	Difference: 63 Watts (140%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5770 is 20% quicker than the GeForce GTX 860M overall, because of its higher bandwidth. (explain)

Radeon HD 5770		76800 MB/sec
GeForce GTX 860M		64000 MB/sec
	Difference: 12800 (20%)

Texel Rate

The GeForce GTX 860M is much (approximately 125%) more effective at AF than the Radeon HD 5770. (explain)

GeForce GTX 860M		76512 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 42512 (125%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 5770 is a better choice, not by a very large margin though. (explain)

Radeon HD 5770		13600 Mpixels/sec
GeForce GTX 860M		12752 Mpixels/sec
	Difference: 848 (7%)

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 maximum amount of data (counted in megabytes per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses 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 number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.