GeForce GTX 950 vs Radeon HD 7990

Intro

Compare those specs to the Radeon HD 7990, which comes with a core clock frequency of 950 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 384-bit memory bus, and uses a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, 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 950		6536 points
	Difference: 8984 (137%)

Ethereum Mining Hash Rate

Radeon HD 7990		32 Mh/s
GeForce GTX 950		10 Mh/s
	Difference: 22 (220%)

Zcash Mining Hash Rate

Radeon HD 7990		513 Sol/s
GeForce GTX 950		155 Sol/s
	Difference: 358 (231%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950		90 Watts
Radeon HD 7990		375 Watts
	Difference: 285 Watts (317%)

Memory Bandwidth

The Radeon HD 7990 should theoretically perform a lot faster than the GeForce GTX 950 overall. (explain)

Radeon HD 7990		576000 MB/sec
GeForce GTX 950		105728 MB/sec
	Difference: 470272 (445%)

Texel Rate

The Radeon HD 7990 will be much (about 395%) more effective at texture filtering than the GeForce GTX 950. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce GTX 950		49152 Mtexels/sec
	Difference: 194048 (395%)

Pixel Rate

The Radeon HD 7990 is quite a bit (approximately 86%) faster with regards to AA than the GeForce GTX 950, and also should be capable of handling higher screen resolutions better. (explain)

Radeon HD 7990		60800 Mpixels/sec
GeForce GTX 950		32768 Mpixels/sec
	Difference: 28032 (86%)

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 max amount of data (in units of megabytes per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it must 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 high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.