GeForce GTX 980M vs Radeon HD 7850

Intro

Compare that to the Radeon HD 7850, which features GPU clock speed of 860 MHz, and 2048 MB of GDDR5 memory running at 1200 MHz through a 256-bit bus. It also is comprised of 1024 SPUs, 64 TAUs, and 32 ROPs.

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 7850		5200 points
	Difference: 4276 (82%)

Zcash Mining Hash Rate

Radeon HD 7850		171 Sol/s
GeForce GTX 980M		155 Sol/s
	Difference: 16 (10%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
Radeon HD 7850		130 Watts
	Difference: 30 Watts (30%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7850 will be 20% faster than the GeForce GTX 980M overall, due to its greater bandwidth. (explain)

Radeon HD 7850		153600 MB/sec
GeForce GTX 980M		128000 MB/sec
	Difference: 25600 (20%)

Texel Rate

The GeForce GTX 980M will be quite a bit (about 81%) faster with regards to anisotropic filtering than the Radeon HD 7850. (explain)

GeForce GTX 980M		99648 Mtexels/sec
Radeon HD 7850		55040 Mtexels/sec
	Difference: 44608 (81%)

Pixel Rate

The GeForce GTX 980M will be quite a bit (about 141%) more effective at anti-aliasing than the Radeon HD 7850, and also should be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon HD 7850		27520 Mpixels/sec
	Difference: 38912 (141%)

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 maximum amount of information (in units of MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling 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 that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs 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 rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.