GeForce GT 340 1GB vs Radeon R9 285

Intro

Compare all that to the Radeon R9 285, which uses a 28 nm design. AMD has clocked the core speed at 918 MHz. The GDDR5 RAM is set to run at a speed of 1375 MHz on this model. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
Radeon R9 285		190 Watts
	Difference: 121 Watts (175%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 285 should be 224% faster than the GeForce GT 340 1GB overall, because of its higher bandwidth. (explain)

Radeon R9 285		176000 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 121600 (224%)

Texel Rate

The Radeon R9 285 will be quite a bit (approximately 484%) more effective at AF than the GeForce GT 340 1GB. (explain)

Radeon R9 285		102816 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 85216 (484%)

Pixel Rate

The Radeon R9 285 is a lot (more or less 568%) more effective at full screen anti-aliasing than the GeForce GT 340 1GB, and also should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 285		29376 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 24976 (568%)

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 largest amount of data (counted in MB per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must 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 high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total amount of texture units 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.