GeForce GTS 150 vs Radeon HD 6750 1GB

Intro

Compare that to the Radeon HD 6750 1GB, which makes use of a 40 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR5 RAM is set to run at a speed of 1000 MHz on this particular card. It features 720 SPUs along with 36 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
GeForce GTS 150		141 Watts
	Difference: 55 Watts (64%)

Memory Bandwidth

In theory, the Radeon HD 6750 1GB is 100% faster than the GeForce GTS 150 overall, due to its greater data rate. (explain)

Radeon HD 6750 1GB		64000 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 32000 (100%)

Texel Rate

The GeForce GTS 150 will be much (about 81%) more effective at AF than the Radeon HD 6750 1GB. (explain)

GeForce GTS 150		47360 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 21260 (81%)

Pixel Rate

The GeForce GTS 150 is just a bit (about 2%) better at full screen anti-aliasing than the Radeon HD 6750 1GB, and also will be capable of handling higher resolutions better. (explain)

GeForce GTS 150		11840 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 240 (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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of 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 output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.