GeForce GT 340 1GB vs Radeon HD 4770

Intro

Compare those specifications to the Radeon HD 4770, which features a core clock speed of 750 MHz and a GDDR5 memory frequency of 800 MHz. It also uses a 128-bit bus, and uses a 40 nm design. It is comprised of 640(128x5) SPUs, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
Radeon HD 4770		80 Watts
	Difference: 11 Watts (16%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 340 1GB should be just a bit faster than the Radeon HD 4770 in general. (explain)

GeForce GT 340 1GB		54400 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 3200 (6%)

Texel Rate

The Radeon HD 4770 will be quite a bit (approximately 36%) better at texture filtering than the GeForce GT 340 1GB. (explain)

Radeon HD 4770		24000 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 6400 (36%)

Pixel Rate

The Radeon HD 4770 should be quite a bit (more or less 173%) more effective at full screen anti-aliasing than the GeForce GT 340 1GB, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 4770		12000 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 7600 (173%)

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 data (measured in MB per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. 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 lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.