GeForce GT 340 vs Radeon HD 7950

Intro

Compare those specs to the Radeon HD 7950, which comes with GPU clock speed of 800 MHz, and 1536 MB of GDDR5 memory running at 1250 MHz through a 384-bit bus. It also is made up of 1792 SPUs, 112 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

As far as performance goes, the Radeon HD 7950 should in theory be quite a bit superior to the GeForce GT 340 in general. (explain)

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

Texel Rate

The Radeon HD 7950 is a lot (approximately 409%) more effective at AF than the GeForce GT 340. (explain)

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

Pixel Rate

The Radeon HD 7950 will be much (about 482%) faster with regards to anti-aliasing than the GeForce GT 340, and also should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 7950		25600 Mpixels/sec
GeForce GT 340		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 transferred over the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher 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 maximum number of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated 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 lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.