Geforce GTX 770 vs Radeon HD 7770

Intro

Compare those specs to the Radeon HD 7770, which has 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 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 770		7854 points
Radeon HD 7770		3180 points
	Difference: 4674 (147%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Geforce GTX 770		230 Watts
	Difference: 150 Watts (188%)

Memory Bandwidth

In theory, the Geforce GTX 770 should be 212% quicker than the Radeon HD 7770 in general, because of its higher data rate. (explain)

Geforce GTX 770		224384 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 152384 (212%)

Texel Rate

The Geforce GTX 770 is a lot (more or less 235%) faster with regards to texture filtering than the Radeon HD 7770. (explain)

Geforce GTX 770		133888 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 93888 (235%)

Pixel Rate

The Geforce GTX 770 is a lot (about 109%) faster with regards to AA than the Radeon HD 7770, and able to handle higher resolutions without slowing down too much. (explain)

Geforce GTX 770		33472 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 17472 (109%)

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: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If 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 amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at 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 can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs 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 fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.