Radeon HD 6870 vs Radeon HD 7750

Intro

Compare all that to the Radeon HD 7750, which has a core clock speed of 800 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is comprised of 512 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 6870		2870 points
Radeon HD 7750		2240 points
	Difference: 630 (28%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 6870		151 Watts
	Difference: 96 Watts (175%)

Memory Bandwidth

Performance-wise, the Radeon HD 6870 should theoretically be much superior to the Radeon HD 7750 overall. (explain)

Radeon HD 6870		134400 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 62400 (87%)

Texel Rate

The Radeon HD 6870 will be quite a bit (approximately 97%) more effective at texture filtering than the Radeon HD 7750. (explain)

Radeon HD 6870		50400 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 24800 (97%)

Pixel Rate

The Radeon HD 6870 will be quite a bit (approximately 125%) faster with regards to anti-aliasing than the Radeon HD 7750, and should be able to handle higher resolutions better. (explain)

Radeon HD 6870		28800 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 16000 (125%)

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 maximum amount of data (counted in MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could 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 Render Output Units by the the card's clock speed. 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 quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.