GeForce GTX 970 vs Radeon HD 5770

Intro

Compare all that to the Radeon HD 5770, which uses a 40 nm design. AMD has set the core frequency at 850 MHz. The GDDR5 memory is set to run at a frequency of 1200 MHz on this particular card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
GeForce GTX 970		145 Watts
	Difference: 37 Watts (34%)

Memory Bandwidth

In theory, the GeForce GTX 970 should be 192% faster than the Radeon HD 5770 overall, due to its greater bandwidth. (explain)

GeForce GTX 970		224000 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 147200 (192%)

Texel Rate

The GeForce GTX 970 should be a lot (approximately 221%) better at anisotropic filtering than the Radeon HD 5770. (explain)

GeForce GTX 970		109200 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 75200 (221%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 970 is superior to the Radeon HD 5770, and very much so. (explain)

GeForce GTX 970		67200 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 53600 (394%)

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 (counted in megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many 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.