GeForce GTS 250 1GB vs Radeon HD 6750

Intro

Compare those specifications to the Radeon HD 6750, which has a core clock speed of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 720 SPUs, 36 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
GeForce GTS 250 1GB		145 Watts
	Difference: 59 Watts (69%)

Memory Bandwidth

Performance-wise, the GeForce GTS 250 1GB should in theory be a small bit better than the Radeon HD 6750 overall. (explain)

GeForce GTS 250 1GB		70400 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 6400 (10%)

Texel Rate

The GeForce GTS 250 1GB is quite a bit (about 81%) more effective at AF than the Radeon HD 6750. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 21132 (81%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTS 250 1GB is superior to the Radeon HD 6750, though only just barely. (explain)

GeForce GTS 250 1GB		11808 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 208 (2%)

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 information (counted in megabytes per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.