Radeon HD 5770 vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which features core speeds of 800 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 memory. It features 512 SPUs as well as 32 TAUs and 16 Rasterization Operator 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

The Radeon HD 5770 should in theory perform a 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 will be a lot (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 will be a bit (more or less 6%) more effective at anti-aliasing than the Radeon HD 7750, and also should be able to handle higher 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: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling 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 could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.