GeForce GT 450 (OEM) vs Radeon R9 390 8G

Intro

Compare all that to the Radeon R9 390 8G, which features a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 512-bit memory bus, and uses a 28 nm design. It is made up of 2560 SPUs, 160 TAUs, and 64 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
Radeon R9 390 8G		275 Watts
	Difference: 169 Watts (159%)

Memory Bandwidth

The Radeon R9 390 8G should in theory be a lot faster than the GeForce GT 450 (OEM) overall. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GT 450 (OEM)		96000 MB/sec
	Difference: 288000 (300%)

Texel Rate

The Radeon R9 390 8G should be much (approximately 744%) better at AF than the GeForce GT 450 (OEM). (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 141040 (744%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 390 8G is superior to the GeForce GT 450 (OEM), by a large margin. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GT 450 (OEM)		18960 Mpixels/sec
	Difference: 45040 (238%)

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 information (measured in megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total texture units of the card by the core 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.