GeForce GTS 250 512MB vs Radeon R7 240

Intro

Compare those specs to the Radeon R7 240, which has GPU core speed of 730 MHz, and 2048 MB of DDR3 RAM running at 900 MHz through a 128-bit bus. It also is comprised of 320 Stream Processors, 20 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 115 Watts (383%)

Memory Bandwidth

In theory, the GeForce GTS 250 512MB is 144% quicker than the Radeon R7 240 in general, due to its greater data rate. (explain)

GeForce GTS 250 512MB		70400 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 41600 (144%)

Texel Rate

The GeForce GTS 250 512MB will be quite a bit (approximately 224%) faster with regards to AF than the Radeon R7 240. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 32632 (224%)

Pixel Rate

The GeForce GTS 250 512MB will be quite a bit (approximately 102%) better at anti-aliasing than the Radeon R7 240, and capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTS 250 512MB		11808 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 5968 (102%)

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 data (measured in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.