Radeon HD 7770 vs Radeon RX 470

Intro

Compare that to the Radeon RX 470, which has core clock speeds of 926 MHz on the GPU, and 1650 MHz on the 8192 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon RX 470		11756 points
Radeon HD 7770		3180 points
	Difference: 8576 (270%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon RX 470		120 Watts
	Difference: 40 Watts (50%)

Memory Bandwidth

In theory, the Radeon RX 470 should perform a lot faster than the Radeon HD 7770 overall. (explain)

Radeon RX 470		211200 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 139200 (193%)

Texel Rate

The Radeon RX 470 will be a lot (about 196%) faster with regards to AF than the Radeon HD 7770. (explain)

Radeon RX 470		118528 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 78528 (196%)

Pixel Rate

The Radeon RX 470 is quite a bit (more or less 85%) more effective at AA than the Radeon HD 7770, and capable of handling higher resolutions better. (explain)

Radeon RX 470		29632 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 13632 (85%)

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 (counted in megabytes per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once 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, 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 amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.