GeForce GTX 980 Ti vs Radeon HD 7770

Intro

Compare all of that to the Radeon HD 7770, which features core speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 640 SPUs along with 40 TAUs and 16 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 980 Ti		17120 points
Radeon HD 7770		3180 points
	Difference: 13940 (438%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
GeForce GTX 980 Ti		250 Watts
	Difference: 170 Watts (213%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 980 Ti should be 367% quicker than the Radeon HD 7770 in general, because of its greater bandwidth. (explain)

GeForce GTX 980 Ti		336000 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 264000 (367%)

Texel Rate

The GeForce GTX 980 Ti is a lot (about 340%) faster with regards to texture filtering than the Radeon HD 7770. (explain)

GeForce GTX 980 Ti		176000 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 136000 (340%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 980 Ti is a better choice, and very much so. (explain)

GeForce GTX 980 Ti		96000 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 80000 (500%)

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 largest amount of information (counted in megabytes 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 speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.