GeForce GTX 650 vs Radeon HD 6770

Intro

Compare those specifications to the Radeon HD 6770, which comes with a GPU core clock speed of 900 MHz, and 512 MB of GDDR5 RAM set to run at 1050 MHz through a 128-bit bus. It also is comprised of 800 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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 650		2263 points
Radeon HD 6770		1520 points
	Difference: 743 (49%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon HD 6770		108 Watts
	Difference: 44 Watts (69%)

Memory Bandwidth

The GeForce GTX 650, in theory, should be a bit faster than the Radeon HD 6770 in general. (explain)

GeForce GTX 650		80000 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 12800 (19%)

Texel Rate

The Radeon HD 6770 will be a bit (approximately 6%) faster with regards to texture filtering than the GeForce GTX 650. (explain)

Radeon HD 6770		36000 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 2144 (6%)

Pixel Rate

The GeForce GTX 650 should be a little bit (approximately 18%) faster with regards to AA than the Radeon HD 6770, and also will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 2528 (18%)

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 MB per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.