Radeon HD 6770 vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which features a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also features 512 SPUs, 32 TAUs, 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 7750		2240 points
Radeon HD 6770		1520 points
	Difference: 720 (47%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 6770		108 Watts
	Difference: 53 Watts (96%)

Memory Bandwidth

In theory, the Radeon HD 7750 is 7% faster than the Radeon HD 6770 overall, because of its greater data rate. (explain)

Radeon HD 7750		72000 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 4800 (7%)

Texel Rate

The Radeon HD 6770 is quite a bit (about 41%) more effective at texture filtering than the Radeon HD 7750. (explain)

Radeon HD 6770		36000 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 10400 (41%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6770 is the winner, but only just. (explain)

Radeon HD 6770		14400 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 1600 (13%)

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 (in units of megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.