GeForce GT 640 DDR3 vs Radeon HD 4350

Intro

Compare those specs to the Radeon HD 4350, which comes with clock speeds of 575 MHz on the GPU, and 500 MHz on the 512 MB of DDR2 RAM. It features 80(16x5) SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4350		22 Watts
GeForce GT 640 DDR3		65 Watts
	Difference: 43 Watts (195%)

Memory Bandwidth

The GeForce GT 640 DDR3 should theoretically perform much faster than the Radeon HD 4350 in general. (explain)

GeForce GT 640 DDR3		57024 MB/sec
Radeon HD 4350		8000 MB/sec
	Difference: 49024 (613%)

Texel Rate

The GeForce GT 640 DDR3 should be quite a bit (approximately 526%) faster with regards to AF than the Radeon HD 4350. (explain)

GeForce GT 640 DDR3		28800 Mtexels/sec
Radeon HD 4350		4600 Mtexels/sec
	Difference: 24200 (526%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GT 640 DDR3 is the winner, by a large margin. (explain)

GeForce GT 640 DDR3		14400 Mpixels/sec
Radeon HD 4350		2300 Mpixels/sec
	Difference: 12100 (526%)

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 maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The higher 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 maximum amount of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's 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 also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.