GeForce GT 340 vs Radeon HD 4850 1GB

Intro

Compare all of that to the Radeon HD 4850 1GB, which makes use of a 55 nm design. AMD has set the core speed at 625 MHz. The GDDR4 RAM runs at a speed of 993 MHz on this card. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
Radeon HD 4850 1GB		110 Watts
	Difference: 41 Watts (59%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4850 1GB should theoretically be a little bit superior to the GeForce GT 340 overall. (explain)

Radeon HD 4850 1GB		63552 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 9152 (17%)

Texel Rate

The Radeon HD 4850 1GB will be much (about 42%) better at texture filtering than the GeForce GT 340. (explain)

Radeon HD 4850 1GB		25000 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 7400 (42%)

Pixel Rate

The Radeon HD 4850 1GB will be much (about 127%) faster with regards to FSAA than the GeForce GT 340, and also should be able to handle higher resolutions more effectively. (explain)

Radeon HD 4850 1GB		10000 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 5600 (127%)

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 data (counted in MB per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 can be applied per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of 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 rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.