Compare any two graphics cards:

GeForce GT 315 vs Radeon R7 240

Intro

The GeForce GT 315 has a GPU core speed of 625 MHz, and the 512 MB of DDR3 RAM runs at 790 MHz through a 128-bit bus. It also is made up of 48 Stream Processors, 16 Texture Address Units, and 8 Raster Operation Units.

Compare those specifications to the Radeon R7 240, which has core speeds of 730 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 RAM. It features 320 SPUs along with 20 TAUs and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
GeForce GT 315		52 Watts
	Difference: 22 Watts (73%)

Memory Bandwidth

Performance-wise, the Radeon R7 240 should theoretically be a small bit better than the GeForce GT 315 overall. (explain)

Radeon R7 240		28800 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 3520 (14%)

Texel Rate

The Radeon R7 240 will be much (approximately 46%) faster with regards to anisotropic filtering than the GeForce GT 315. (explain)

Radeon R7 240		14600 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 4600 (46%)

Pixel Rate

The Radeon R7 240 will be a small bit (about 17%) faster with regards to full screen anti-aliasing than the GeForce GT 315, and able to handle higher resolutions better. (explain)

Radeon R7 240		5840 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 840 (17%)

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

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GeForce GT 315

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Radeon R7 240

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model	GeForce GT 315	Radeon R7 240
Manufacturer	nVidia	AMD
Year	November 2009	October 2013
Code Name	GT216	Oland PRO
Memory	512 MB	2048 MB
Core Speed	625 MHz	730 MHz
Memory Speed	1580 MHz	1800 MHz
Power (Max TDP)	52 watts	30 watts
Bandwidth	25280 MB/sec	28800 MB/sec
Texel Rate	10000 Mtexels/sec	14600 Mtexels/sec
Pixel Rate	5000 Mpixels/sec	5840 Mpixels/sec
Unified Shaders	48	320
Texture Mapping Units	16	20
Render Output Units	8	8
Bus Type	DDR3	DDR3
Bus Width	128-bit	128-bit
Fab Process	40 nm	28 nm
Transistors	486 million	1040 million
Bus	PCIe 2.0	PCIe 3.0 x16
DirectX Version	DirectX 10.1	DirectX 11.2
OpenGL Version	OpenGL 3.2	OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 are processed in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics 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 most pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

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