GeForce GTX 970 vs Geforce GTX 780

Intro

Compare all that to the Geforce GTX 780, which has a clock frequency of 863 MHz and a GDDR5 memory speed of 1502 MHz. It also uses a 384-bit bus, and makes use of a 28 nm design. It is made up of 2304 SPUs, 192 Texture Address Units, and 48 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

GeForce GTX 970		10867 points
Geforce GTX 780		10082 points
	Difference: 785 (8%)

Ethereum Mining Hash Rate

Geforce GTX 780		20 Mh/s
GeForce GTX 970		19 Mh/s
	Difference: 1 (5%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 970		145 Watts
Geforce GTX 780		250 Watts
	Difference: 105 Watts (72%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 780 should in theory be a lot better than the GeForce GTX 970 overall. (explain)

Geforce GTX 780		288384 MB/sec
GeForce GTX 970		224000 MB/sec
	Difference: 64384 (29%)

Texel Rate

The Geforce GTX 780 is much (about 52%) faster with regards to AF than the GeForce GTX 970. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce GTX 970		109200 Mtexels/sec
	Difference: 56496 (52%)

Pixel Rate

The GeForce GTX 970 is much (more or less 62%) better at anti-aliasing than the Geforce GTX 780, and capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 970		67200 Mpixels/sec
Geforce GTX 780		41424 Mpixels/sec
	Difference: 25776 (62%)

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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per 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 this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels 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. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.