GeForce GTX 470 vs Radeon HD 7770

Intro

Compare all that to the Radeon HD 7770, which features GPU core speed of 1000 MHz, and 1024 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also features 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

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

Radeon HD 7770		3180 points
GeForce GTX 470		2937 points
	Difference: 243 (8%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
GeForce GTX 470		215 Watts
	Difference: 135 Watts (169%)

Memory Bandwidth

In theory, the GeForce GTX 470 will be 86% quicker than the Radeon HD 7770 in general, due to its higher data rate. (explain)

GeForce GTX 470		133920 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 61920 (86%)

Texel Rate

The Radeon HD 7770 will be a bit (more or less 18%) better at AF than the GeForce GTX 470. (explain)

Radeon HD 7770		40000 Mtexels/sec
GeForce GTX 470		33992 Mtexels/sec
	Difference: 6008 (18%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 470 is the winner, and very much so. (explain)

GeForce GTX 470		24280 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 8280 (52%)

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 (counted in MB per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.