GeForce GT 240 GDDR5 1GB vs Radeon R9 390X 8G

Intro

Compare those specs to the Radeon R9 390X 8G, which comes with GPU core speed of 1050 MHz, and 8192 MB of GDDR5 RAM running at 1500 MHz through a 512-bit bus. It also is comprised of 2816 SPUs, 176 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 205 Watts (293%)

Memory Bandwidth

As far as performance goes, the Radeon R9 390X 8G should theoretically be much superior to the GeForce GT 240 GDDR5 1GB in general. (explain)

Radeon R9 390X 8G		384000 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 329600 (606%)

Texel Rate

The Radeon R9 390X 8G should be quite a bit (more or less 950%) more effective at AF than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 167200 (950%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 390X 8G is superior to the GeForce GT 240 GDDR5 1GB, and very much so. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 62800 (1427%)

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 (in units of MB per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.