GeForce GTX 465 vs Radeon HD 4770

Intro

Compare that to the Radeon HD 4770, which has core speeds of 750 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 memory. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770		80 Watts
GeForce GTX 465		200 Watts
	Difference: 120 Watts (150%)

Memory Bandwidth

In theory, the GeForce GTX 465 will be 100% quicker than the Radeon HD 4770 overall, due to its greater bandwidth. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 51392 (100%)

Texel Rate

The GeForce GTX 465 is just a bit (about 11%) more effective at texture filtering than the Radeon HD 4770. (explain)

GeForce GTX 465		26708 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 2708 (11%)

Pixel Rate

The GeForce GTX 465 should be a lot (approximately 62%) better at full screen anti-aliasing than the Radeon HD 4770, and able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 7424 (62%)

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 (counted in MB per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 processed in one 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 better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill 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 maximum fill rate.