GeForce GT 450 (OEM) vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which has a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also features 512 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
GeForce GT 450 (OEM)		106 Watts
	Difference: 51 Watts (93%)

Memory Bandwidth

The GeForce GT 450 (OEM), in theory, should be quite a bit faster than the Radeon HD 7750 overall. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 24000 (33%)

Texel Rate

The Radeon HD 7750 will be quite a bit (more or less 35%) more effective at texture filtering than the GeForce GT 450 (OEM). (explain)

Radeon HD 7750		25600 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 6640 (35%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GT 450 (OEM) is superior to the Radeon HD 7750, by far. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 6160 (48%)

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 data (counted in MB per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video 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 the graphics card could possibly write to its local memory per 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 - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.