Geforce GTX 780 vs Radeon HD 7970

Intro

Compare all of that to the Radeon HD 7970, which comes with a core clock speed of 925 MHz and a GDDR5 memory speed of 1375 MHz. It also uses a 384-bit memory bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 Texture Address Units, 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 780		10082 points
Radeon HD 7970		8225 points
	Difference: 1857 (23%)

Grand Theft Auto V | 1920x1080 | Very High

Geforce GTX 780		48 FPS
Radeon HD 7970		37 FPS
	Difference: 11 (30%)

Ethereum Mining Hash Rate

Radeon HD 7970		21 Mh/s
Geforce GTX 780		20 Mh/s
	Difference: 1 (5%)

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically, the Geforce GTX 780 should be a small bit faster than the Radeon HD 7970 overall. (explain)

Geforce GTX 780		288384 MB/sec
Radeon HD 7970		264000 MB/sec
	Difference: 24384 (9%)

Texel Rate

The Geforce GTX 780 will be a lot (approximately 40%) faster with regards to texture filtering than the Radeon HD 7970. (explain)

Geforce GTX 780		165696 Mtexels/sec
Radeon HD 7970		118400 Mtexels/sec
	Difference: 47296 (40%)

Pixel Rate

The Geforce GTX 780 will be much (more or less 40%) better at anti-aliasing than the Radeon HD 7970, and able to handle higher resolutions while still performing well. (explain)

Geforce GTX 780		41424 Mpixels/sec
Radeon HD 7970		29600 Mpixels/sec
	Difference: 11824 (40%)

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: Bandwidth is the max amount of data (in units of MB per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling 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 that the graphics card could possibly write to its local memory in one 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 - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.