Radeon HD 6450 (OEM) 1GB vs Radeon RX 7900 XT

Intro

Compare those specs to the Radeon RX 7900 XT, which comes with a clock frequency of 1500 MHz and a GDDR6 memory speed of 2500 MHz. It also makes use of a 320-bit bus, and uses a 5 nm design. It is comprised of 5376 SPUs, 336 Texture Address Units, and 192 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 1GB		31 Watts
Radeon RX 7900 XT		300 Watts
	Difference: 269 Watts (868%)

Memory Bandwidth

The Radeon RX 7900 XT, in theory, should perform much faster than the Radeon HD 6450 (OEM) 1GB overall. (explain)

Radeon RX 7900 XT		819200 MB/sec
Radeon HD 6450 (OEM) 1GB		28800 MB/sec
	Difference: 790400 (2744%)

Texel Rate

The Radeon RX 7900 XT should be quite a bit (approximately 8300%) better at AF than the Radeon HD 6450 (OEM) 1GB. (explain)

Radeon RX 7900 XT		504000 Mtexels/sec
Radeon HD 6450 (OEM) 1GB		6000 Mtexels/sec
	Difference: 498000 (8300%)

Pixel Rate

The Radeon RX 7900 XT is much (about 9500%) faster with regards to FSAA than the Radeon HD 6450 (OEM) 1GB, and also capable of handling higher screen resolutions while still performing well. (explain)

Radeon RX 7900 XT		288000 Mpixels/sec
Radeon HD 6450 (OEM) 1GB		3000 Mpixels/sec
	Difference: 285000 (9500%)

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: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, the result should 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 number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.