Radeon HD 5870 vs Radeon HD 7750

Intro

Compare all of that to the Radeon HD 7750, which has core speeds of 800 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 RAM. It features 512 SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 5870		188 Watts
	Difference: 133 Watts (242%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5870 should be a lot faster than the Radeon HD 7750 in general. (explain)

Radeon HD 5870		153600 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 81600 (113%)

Texel Rate

The Radeon HD 5870 should be much (about 166%) more effective at texture filtering than the Radeon HD 7750. (explain)

Radeon HD 5870		68000 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 42400 (166%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 5870 is superior to the Radeon HD 7750, by a large margin. (explain)

Radeon HD 5870		27200 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 14400 (113%)

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 max amount of data (measured in MB per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card 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 video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.