GeForce GTS 450 1GB vs Radeon HD 6770

Intro

Compare those specifications to the Radeon HD 6770, which has a GPU core clock speed of 900 MHz, and 512 MB of GDDR5 RAM running at 1050 MHz through a 128-bit bus. It also is comprised of 800 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
Radeon HD 6770		108 Watts
	Difference: 2 Watts (2%)

Memory Bandwidth

The Radeon HD 6770 should in theory perform a little bit faster than the GeForce GTS 450 1GB overall. (explain)

Radeon HD 6770		67200 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 9472 (16%)

Texel Rate

The Radeon HD 6770 will be quite a bit (about 44%) faster with regards to AF than the GeForce GTS 450 1GB. (explain)

Radeon HD 6770		36000 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 10944 (44%)

Pixel Rate

The Radeon HD 6770 is a bit (approximately 15%) more effective at full screen anti-aliasing than the GeForce GTS 450 1GB, and also should be capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 6770		14400 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 1872 (15%)

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 max amount of information (measured in MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, 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 texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour 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 rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.