Geforce GTX 670 vs Radeon HD 7770

Intro

Compare all that to the Radeon HD 7770, which features a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also features 640 SPUs, 40 TAUs, and 16 ROPs.

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

Geforce GTX 670		7351 points
Radeon HD 7770		3180 points
	Difference: 4171 (131%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Geforce GTX 670		170 Watts
	Difference: 90 Watts (113%)

Memory Bandwidth

In theory, the Geforce GTX 670 should be much faster than the Radeon HD 7770 in general. (explain)

Geforce GTX 670		192000 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 120000 (167%)

Texel Rate

The Geforce GTX 670 will be a lot (approximately 156%) more effective at AF than the Radeon HD 7770. (explain)

Geforce GTX 670		102480 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 62480 (156%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Geforce GTX 670 is a better choice, and very much so. (explain)

Geforce GTX 670		29280 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 13280 (83%)

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 MB per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can 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 Render Output Units 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 output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.