GeForce RTX 3090 vs Radeon HD 7770

Intro

Compare that to the Radeon HD 7770, which comes with a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit bus, and uses a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
GeForce RTX 3090		350 Watts
	Difference: 270 Watts (338%)

Memory Bandwidth

As far as performance goes, the GeForce RTX 3090 should theoretically be a lot better than the Radeon HD 7770 overall. (explain)

GeForce RTX 3090		958668 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 886668 (1231%)

Texel Rate

The GeForce RTX 3090 will be much (approximately 1044%) faster with regards to anisotropic filtering than the Radeon HD 7770. (explain)

GeForce RTX 3090		457560 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 417560 (1044%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce RTX 3090 is a better choice, and very much so. (explain)

GeForce RTX 3090		156240 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 140240 (877%)

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 data (measured in MB per second) that can be transferred over the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write 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 core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.