GeForce GTS 450 vs Radeon HD 6750 1GB

Intro

Compare all of that to the Radeon HD 6750 1GB, which uses a 40 nm design. ATi has set the core frequency at 725 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this specific model. It features 720 SPUs along with 36 TAUs and 16 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
GeForce GTS 450		106 Watts
	Difference: 20 Watts (23%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6750 1GB should be 11% quicker than the GeForce GTS 450 in general, due to its greater data rate. (explain)

Radeon HD 6750 1GB		64000 MB/sec
GeForce GTS 450		57728 MB/sec
	Difference: 6272 (11%)

Texel Rate

The Radeon HD 6750 1GB is a bit (approximately 4%) faster with regards to AF than the GeForce GTS 450. (explain)

Radeon HD 6750 1GB		26100 Mtexels/sec
GeForce GTS 450		25056 Mtexels/sec
	Difference: 1044 (4%)

Pixel Rate

The GeForce GTS 450 is a bit (about 8%) faster with regards to anti-aliasing than the Radeon HD 6750 1GB, and also will be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTS 450		12528 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 928 (8%)

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.