GeForce GT 340 vs Radeon HD 4730

Intro

Compare those specs to the Radeon HD 4730, which features a core clock speed of 700 MHz and a GDDR5 memory frequency of 900 MHz. It also uses a 128-bit memory bus, and uses a 55 nm design. It features 640(128x5) SPUs, 32 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
Radeon HD 4730		140 Watts
	Difference: 71 Watts (103%)

Memory Bandwidth

The Radeon HD 4730, in theory, should be a bit faster than the GeForce GT 340 overall. (explain)

Radeon HD 4730		57600 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 3200 (6%)

Texel Rate

The Radeon HD 4730 will be quite a bit (about 27%) better at texture filtering than the GeForce GT 340. (explain)

Radeon HD 4730		22400 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 4800 (27%)

Pixel Rate

The Radeon HD 4730 will be a lot (more or less 27%) better at full screen anti-aliasing than the GeForce GT 340, and will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 4730		5600 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 1200 (27%)

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 largest amount of data (measured in MB per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.