Radeon HD 5670 vs Radeon HD 5750 512MB

Intro

Compare those specs to the Radeon HD 5750 512MB, which features GPU clock speed of 700 MHz, and 512 MB of GDDR5 RAM running at 1150 MHz through a 128-bit bus. It also features 720(144x5) Stream Processors, 36 Texture Address Units, and 16 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670		61 Watts
Radeon HD 5750 512MB		86 Watts
	Difference: 25 Watts (41%)

Memory Bandwidth

In theory, the Radeon HD 5750 512MB is 15% quicker than the Radeon HD 5670 overall, due to its higher bandwidth. (explain)

Radeon HD 5750 512MB		73600 MB/sec
Radeon HD 5670		64000 MB/sec
	Difference: 9600 (15%)

Texel Rate

The Radeon HD 5750 512MB is quite a bit (more or less 63%) more effective at anisotropic filtering than the Radeon HD 5670. (explain)

Radeon HD 5750 512MB		25200 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 9700 (63%)

Pixel Rate

The Radeon HD 5750 512MB will be much (more or less 81%) better at AA than the Radeon HD 5670, and should be able to handle higher resolutions while still performing well. (explain)

Radeon HD 5750 512MB		11200 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 5000 (81%)

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 (measured in MB per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, the result 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core 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 most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.