GeForce GTX 850M vs Radeon HD 5770

Intro

Compare those specifications 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 card. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
Radeon HD 5770		108 Watts
	Difference: 68 Watts (170%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5770 should perform quite a bit faster than the GeForce GTX 850M overall. (explain)

Radeon HD 5770		76800 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 44800 (140%)

Texel Rate

The GeForce GTX 850M will be just a bit (approximately 3%) better at anisotropic filtering than the Radeon HD 5770. (explain)

GeForce GTX 850M		35040 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 1040 (3%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 850M is superior to the Radeon HD 5770, but it probably won't make a huge difference. (explain)

GeForce GTX 850M		14016 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 416 (3%)

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 (in units of megabytes per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units of the card by the core clock 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its 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 clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.