GeForce GTX 980M vs Radeon HD 7990

Intro

Compare those specifications 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 RAM. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

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 speaking, the Radeon HD 7990 should be quite a bit 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 will be a lot (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

The GeForce GTX 980M will be a little bit (approximately 9%) faster with regards to full screen anti-aliasing than the Radeon HD 7990, and also capable of handling higher resolutions without slowing down too much. (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 max amount of information (in units of MB per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR 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 texture units by the core speed of the chip. The higher this number, 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 most pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.