GeForce GT 640 DDR3 vs Radeon HD 4350

Intro

Compare those specifications to the Radeon HD 4350, which uses a 55 nm design. AMD has set the core frequency at 575 MHz. The DDR2 RAM runs at a speed of 500 MHz on this specific card. It features 80(16x5) SPUs as well as 8 Texture Address Units 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

Theoretically speaking, the GeForce GT 640 DDR3 should perform a lot faster than the Radeon HD 4350 overall. (explain)

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

Texel Rate

The GeForce GT 640 DDR3 is a lot (more or less 526%) faster with regards to texture filtering 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 running with high levels of AA is important to you, then the GeForce GT 640 DDR3 is a better choice, 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: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.