Radeon HD 4850 512MB vs Radeon HD 5750 512MB

Intro

Compare all of that to the Radeon HD 5750 512MB, which has core clock speeds of 700 MHz on the GPU, and 1150 MHz on the 512 MB of GDDR5 RAM. It features 720(144x5) SPUs along with 36 TAUs and 16 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 512MB		86 Watts
Radeon HD 4850 512MB		110 Watts
	Difference: 24 Watts (28%)

Memory Bandwidth

The Radeon HD 5750 512MB should theoretically perform a bit faster than the Radeon HD 4850 512MB in general. (explain)

Radeon HD 5750 512MB		73600 MB/sec
Radeon HD 4850 512MB		63552 MB/sec
	Difference: 10048 (16%)

Texel Rate

The Radeon HD 5750 512MB is just a bit (approximately 1%) faster with regards to AF than the Radeon HD 4850 512MB. (explain)

Radeon HD 5750 512MB		25200 Mtexels/sec
Radeon HD 4850 512MB		25000 Mtexels/sec
	Difference: 200 (1%)

Pixel Rate

The Radeon HD 5750 512MB should be just a bit (about 12%) more effective at AA than the Radeon HD 4850 512MB, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 5750 512MB		11200 Mpixels/sec
Radeon HD 4850 512MB		10000 Mpixels/sec
	Difference: 1200 (12%)

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 data (measured in megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the 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 number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.