Radeon HD 6750 1GB vs Radeon HD 7770

Intro

Compare those specifications to the Radeon HD 7770, which features a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit memory bus, and uses a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon HD 6750 1GB		86 Watts
	Difference: 6 Watts (8%)

Memory Bandwidth

In theory, the Radeon HD 7770 is 13% quicker than the Radeon HD 6750 1GB overall, due to its higher data rate. (explain)

Radeon HD 7770		72000 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 8000 (13%)

Texel Rate

The Radeon HD 7770 is a lot (about 53%) faster with regards to AF than the Radeon HD 6750 1GB. (explain)

Radeon HD 7770		40000 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 13900 (53%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7770 is superior to the Radeon HD 6750 1GB, and very much so. (explain)

Radeon HD 7770		16000 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 4400 (38%)

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 transported across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 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 high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per 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 figure 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 filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.