Radeon HD 5770 vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which features a clock speed of 800 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It features 512 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 5770		108 Watts
	Difference: 53 Watts (96%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5770 should perform a little bit faster than the Radeon HD 7750 overall. (explain)

Radeon HD 5770		76800 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 4800 (7%)

Texel Rate

The Radeon HD 5770 should be much (more or less 33%) faster with regards to anisotropic filtering than the Radeon HD 7750. (explain)

Radeon HD 5770		34000 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 8400 (33%)

Pixel Rate

The Radeon HD 5770 is a bit (more or less 6%) better at anti-aliasing than the Radeon HD 7750, and also should be able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 5770		13600 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 800 (6%)

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 maximum amount of data (measured in megabytes per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the card's bus 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 card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the card's clock speed. 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 output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.