GeForce GTX 970 vs Radeon HD 7770

Intro

Compare those specifications to the Radeon HD 7770, which comes with a GPU core clock speed of 1000 MHz, and 1024 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also is made up of 640 Stream Processors, 40 Texture Address Units, 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 970		10867 points
Radeon HD 7770		3180 points
	Difference: 7687 (242%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
GeForce GTX 970		145 Watts
	Difference: 65 Watts (81%)

Memory Bandwidth

In theory, the GeForce GTX 970 should perform quite a bit faster than the Radeon HD 7770 overall. (explain)

GeForce GTX 970		224000 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 152000 (211%)

Texel Rate

The GeForce GTX 970 will be quite a bit (approximately 173%) faster with regards to anisotropic filtering than the Radeon HD 7770. (explain)

GeForce GTX 970		109200 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 69200 (173%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 970 is superior to the Radeon HD 7770, by far. (explain)

GeForce GTX 970		67200 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 51200 (320%)

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 information (measured in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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