GeForce GTX 980M vs Radeon HD 6770

Intro

Compare that to the Radeon HD 6770, which has a clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 128-bit bus, and uses a 40 nm design. It is made up of 800 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 980M		9476 points
Radeon HD 6770		1520 points
	Difference: 7956 (523%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
Radeon HD 6770		108 Watts
	Difference: 8 Watts (8%)

Memory Bandwidth

Performance-wise, the GeForce GTX 980M should theoretically be a lot better than the Radeon HD 6770 in general. (explain)

GeForce GTX 980M		128000 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 60800 (90%)

Texel Rate

The GeForce GTX 980M will be quite a bit (more or less 177%) better at AF than the Radeon HD 6770. (explain)

GeForce GTX 980M		99648 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 63648 (177%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 980M is superior to the Radeon HD 6770, by a large margin. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 52032 (361%)

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 max amount of data (in units of MB per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. 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 can be applied in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.