Geforce GTX 770 vs Radeon HD 7790

Intro

Compare that to the Radeon HD 7790, which makes use of a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 memory is set to run at a frequency of 1500 MHz on this card. It features 896 SPUs as well as 56 Texture Address Units and 16 Rasterization Operator Units.

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 770		7854 points
Radeon HD 7790		4330 points
	Difference: 3524 (81%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
Geforce GTX 770		230 Watts
	Difference: 145 Watts (171%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 770 will be 134% faster than the Radeon HD 7790 in general, due to its greater data rate. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 128384 (134%)

Texel Rate

The Geforce GTX 770 is quite a bit (more or less 139%) more effective at AF than the Radeon HD 7790. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 77888 (139%)

Pixel Rate

The Geforce GTX 770 should be a lot (more or less 109%) faster with regards to AA than the Radeon HD 7790, and will be able to handle higher screen resolutions while still performing well. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 17472 (109%)

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 (measured in MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics 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 maximum amount of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends 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 max fill rate.