GeForce GT 340 1GB vs Radeon HD 4650 1GB

Intro

Compare those specs to the Radeon HD 4650 1GB, which makes use of a 55 nm design. AMD has clocked the core speed at 600 MHz. The GDDR3 RAM is set to run at a speed of 700 MHz on this specific model. It features 320(64x5) SPUs as well as 32 TAUs and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
GeForce GT 340 1GB		69 Watts
	Difference: 14 Watts (25%)

Memory Bandwidth

Theoretically, the GeForce GT 340 1GB should be a lot faster than the Radeon HD 4650 1GB in general. (explain)

GeForce GT 340 1GB		54400 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 32000 (143%)

Texel Rate

The Radeon HD 4650 1GB is a little bit (about 9%) better at anisotropic filtering than the GeForce GT 340 1GB. (explain)

Radeon HD 4650 1GB		19200 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 1600 (9%)

Pixel Rate

The Radeon HD 4650 1GB is a small bit (about 9%) more effective at FSAA than the GeForce GT 340 1GB, and should be able to handle higher resolutions while still performing well. (explain)

Radeon HD 4650 1GB		4800 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 400 (9%)

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 moved past the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once 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 number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the 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 most pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.