GeForce GT 340 1GB vs Radeon HD 7950

Intro

Compare those specifications to the Radeon HD 7950, which has a clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 384-bit bus, and uses a 28 nm design. It is comprised of 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
Radeon HD 7950		200 Watts
	Difference: 131 Watts (190%)

Memory Bandwidth

Theoretically, the Radeon HD 7950 should perform a lot faster than the GeForce GT 340 1GB in general. (explain)

Radeon HD 7950		240000 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 185600 (341%)

Texel Rate

The Radeon HD 7950 should be quite a bit (approximately 409%) more effective at texture filtering than the GeForce GT 340 1GB. (explain)

Radeon HD 7950		89600 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 72000 (409%)

Pixel Rate

The Radeon HD 7950 is quite a bit (more or less 482%) better at FSAA than the GeForce GT 340 1GB, and also able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 7950		25600 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 21200 (482%)

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 data (counted in megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 can be applied per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.