GeForce RTX 3090 vs Radeon HD 7950

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically, the GeForce RTX 3090 should be a lot faster than the Radeon HD 7950 in general. (explain)

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

Texel Rate

The GeForce RTX 3090 is quite a bit (approximately 411%) more effective at anisotropic filtering than the Radeon HD 7950. (explain)

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

Pixel Rate

The GeForce RTX 3090 will be quite a bit (approximately 510%) better at FSAA than the Radeon HD 7950, and capable of handling higher resolutions while still performing well. (explain)

GeForce RTX 3090		156240 Mpixels/sec
Radeon HD 7950		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 largest amount of information (in units of MB per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.