GeForce GT 340 vs Radeon R9 M385X

Intro

Compare those specs to the Radeon R9 M385X, which uses a 28 nm design. AMD has clocked the core speed at 1100 MHz. The GDDR5 RAM runs at a speed of 1500 MHz on this specific card. It features 896 SPUs along with 56 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M385X is 76% quicker than the GeForce GT 340 overall, because of its higher bandwidth. (explain)

Radeon R9 M385X		96000 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 41600 (76%)

Texel Rate

The Radeon R9 M385X is much (more or less 250%) better at texture filtering than the GeForce GT 340. (explain)

Radeon R9 M385X		61600 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 44000 (250%)

Pixel Rate

The Radeon R9 M385X will be much (about 300%) better at FSAA than the GeForce GT 340, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 M385X		17600 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 13200 (300%)

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 largest amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR memory, it 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock 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 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 max fill rate.