GeForce GT 340 1GB vs Radeon R9 M390X

Intro

Compare those specifications to the Radeon R9 M390X, which has a core clock frequency of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
Radeon R9 M390X		125 Watts
	Difference: 56 Watts (81%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M390X should in theory be quite a bit superior to the GeForce GT 340 1GB in general. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 105600 (194%)

Texel Rate

The Radeon R9 M390X is much (about 426%) better at AF than the GeForce GT 340 1GB. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 74944 (426%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 M390X is superior to the GeForce GT 340 1GB, by far. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 18736 (426%)

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 information (in units of MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core speed of the card. 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 many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.