GeForce GTX 980M vs Radeon HD 7990

Intro

Compare that to the Radeon HD 7990, which features a GPU core clock speed of 950 MHz, and 3072 MB of GDDR5 RAM set to run at 1500 MHz through a 384-bit bus. It also is comprised of 2048 Stream Processors, 128 TAUs, and 32 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

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

Performance-wise, the Radeon HD 7990 should in theory be much better than the GeForce GTX 980M in general. (explain)

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

Texel Rate

The Radeon HD 7990 will be much (about 144%) better at 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 screen resolution is important to you, then the GeForce GTX 980M is the winner, 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: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.