GeForce GT 340 vs Radeon HD 5770

Intro

Compare that to the Radeon HD 5770, which has a GPU core clock speed of 850 MHz, and 1024 MB of GDDR5 memory set to run at 1200 MHz through a 128-bit bus. It also is comprised of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
Radeon HD 5770		108 Watts
	Difference: 39 Watts (57%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5770 should be 41% faster than the GeForce GT 340 overall, because of its greater bandwidth. (explain)

Radeon HD 5770		76800 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 22400 (41%)

Texel Rate

The Radeon HD 5770 is much (about 93%) better at texture filtering than the GeForce GT 340. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 16400 (93%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 5770 is a better choice, by far. (explain)

Radeon HD 5770		13600 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 9200 (209%)

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 data (in units of MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, 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 figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling 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 the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. 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 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 max fill rate.