GeForce GTX 980M vs Radeon HD 7990

Intro

Compare all of that to the Radeon HD 7990, which comes with core speeds of 950 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

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

Radeon HD 7990		15520 points
GeForce GTX 980M		9476 points
	Difference: 6044 (64%)

Zcash Mining Hash Rate

Radeon HD 7990		513 Sol/s
GeForce GTX 980M		155 Sol/s
	Difference: 358 (231%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
Radeon HD 7990		375 Watts
	Difference: 275 Watts (275%)

Memory Bandwidth

Theoretically, the Radeon HD 7990 should perform much faster than the GeForce GTX 980M overall. (explain)

Radeon HD 7990		576000 MB/sec
GeForce GTX 980M		128000 MB/sec
	Difference: 448000 (350%)

Texel Rate

The Radeon HD 7990 is quite a bit (about 144%) faster with regards to anisotropic filtering than the GeForce GTX 980M. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce GTX 980M		99648 Mtexels/sec
	Difference: 143552 (144%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 980M is a better choice, but it probably won't make a huge difference. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 5632 (9%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.