GeForce GTX 465 vs Radeon HD 6770 1GB

Intro

Compare all that to the Radeon HD 6770 1GB, which makes use of a 40 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 memory is set to run at a speed of 1050 MHz on this specific card. It features 800 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
GeForce GTX 465		200 Watts
	Difference: 92 Watts (85%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 465 will be 53% quicker than the Radeon HD 6770 1GB overall, because of its higher bandwidth. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 35392 (53%)

Texel Rate

The Radeon HD 6770 1GB should be much (approximately 35%) more effective at AF than the GeForce GTX 465. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 9292 (35%)

Pixel Rate

The GeForce GTX 465 is a lot (approximately 35%) better at anti-aliasing than the Radeon HD 6770 1GB, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 5024 (35%)

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 maximum amount of data (measured in megabytes per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's 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 texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.