GeForce GTX 1660 Ti vs Radeon HD 7770

Intro

Compare those specs to the Radeon HD 7770, which has GPU core speed of 1000 MHz, and 1024 MB of GDDR5 RAM running at 1125 MHz through a 128-bit bus. It also is comprised of 640 Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
GeForce GTX 1660 Ti		120 Watts
	Difference: 40 Watts (50%)

Memory Bandwidth

The GeForce GTX 1660 Ti should theoretically perform a lot faster than the Radeon HD 7770 in general. (explain)

GeForce GTX 1660 Ti		294912 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 222912 (310%)

Texel Rate

The GeForce GTX 1660 Ti is a lot (approximately 260%) faster with regards to anisotropic filtering than the Radeon HD 7770. (explain)

GeForce GTX 1660 Ti		144000 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 104000 (260%)

Pixel Rate

The GeForce GTX 1660 Ti is quite a bit (about 350%) better at full screen anti-aliasing than the Radeon HD 7770, and should be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 1660 Ti		72000 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 56000 (350%)

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 transported over the external memory interface in a second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka 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 bandwidth is, the lower the potential to reach the maximum fill rate.