Radeon HD 6770 vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which comes with GPU core speed of 800 MHz, and 1024 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also is made up of 512 Stream Processors, 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

The Radeon HD 7750 should in theory be a bit faster than the Radeon HD 6770 overall. (explain)

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

Texel Rate

The Radeon HD 6770 should be much (approximately 41%) more effective at AF than the Radeon HD 7750. (explain)

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

Pixel Rate

The Radeon HD 6770 should be a bit (more or less 13%) better at AA than the Radeon HD 7750, and also will be able to handle higher resolutions better. (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 maximum amount of data (measured in MB per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units by the core 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.