GeForce RTX 3090 vs Radeon HD 7950 3GB

Intro

Compare all that to the Radeon HD 7950 3GB, which has a core clock frequency of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 384-bit memory bus, and makes use of a 28 nm design. It is made up of 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB		200 Watts
GeForce RTX 3090		350 Watts
	Difference: 150 Watts (75%)

Memory Bandwidth

The GeForce RTX 3090 should in theory be a lot faster than the Radeon HD 7950 3GB overall. (explain)

GeForce RTX 3090		958668 MB/sec
Radeon HD 7950 3GB		240000 MB/sec
	Difference: 718668 (299%)

Texel Rate

The GeForce RTX 3090 should be quite a bit (approximately 411%) better at anisotropic filtering than the Radeon HD 7950 3GB. (explain)

GeForce RTX 3090		457560 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 367960 (411%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce RTX 3090 is superior to the Radeon HD 7950 3GB, by far. (explain)

GeForce RTX 3090		156240 Mpixels/sec
Radeon HD 7950 3GB		25600 Mpixels/sec
	Difference: 130640 (510%)

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 information (in units of MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.