Radeon HD 7770 vs Radeon RX 7900 XTX

Intro

Compare that to the Radeon RX 7900 XTX, which has clock speeds of 1855 MHz on the GPU, and 2500 MHz on the 24576 MB of GDDR6 RAM. It features 6144 SPUs as well as 384 Texture Address Units and 192 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon RX 7900 XTX		355 Watts
	Difference: 275 Watts (344%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 7900 XTX should be 1265% faster than the Radeon HD 7770 in general, because of its greater data rate. (explain)

Radeon RX 7900 XTX		983040 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 911040 (1265%)

Texel Rate

The Radeon RX 7900 XTX should be much (about 1681%) faster with regards to texture filtering than the Radeon HD 7770. (explain)

Radeon RX 7900 XTX		712320 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 672320 (1681%)

Pixel Rate

The Radeon RX 7900 XTX should be much (approximately 2126%) better at AA than the Radeon HD 7770, and also should be able to handle higher resolutions while still performing well. (explain)

Radeon RX 7900 XTX		356160 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 340160 (2126%)

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 transported over the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of texture units of the card 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core 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 also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.