Radeon R9 290X vs Radeon R9 M395X

Intro

Compare all of that to the Radeon R9 M395X, which uses a 28 nm design. AMD has set the core speed at 723 MHz. The GDDR5 memory works at a frequency of 1250 MHz on this card. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
Radeon R9 290X		300 Watts
	Difference: 175 Watts (140%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 290X should be much faster than the Radeon R9 M395X overall. (explain)

Radeon R9 290X		320000 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 160000 (100%)

Texel Rate

The Radeon R9 290X is much (about 52%) faster with regards to AF than the Radeon R9 M395X. (explain)

Radeon R9 290X		140800 Mtexels/sec
Radeon R9 M395X		92544 Mtexels/sec
	Difference: 48256 (52%)

Pixel Rate

The Radeon R9 290X is a lot (about 121%) more effective at FSAA than the Radeon R9 M395X, and also will be able to handle higher resolutions without slowing down too much. (explain)

Radeon R9 290X		51200 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 28064 (121%)

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 (counted in MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.