GeForce 8800 Ultra vs Radeon HD 7750

Intro

Compare all that to the Radeon HD 7750, which features a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also is comprised of 512 Stream Processors, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
GeForce 8800 Ultra		171 Watts
	Difference: 116 Watts (211%)

Memory Bandwidth

In theory, the GeForce 8800 Ultra should be 44% quicker than the Radeon HD 7750 in general, because of its higher bandwidth. (explain)

GeForce 8800 Ultra		103680 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 31680 (44%)

Texel Rate

The GeForce 8800 Ultra is a lot (approximately 53%) faster with regards to texture filtering than the Radeon HD 7750. (explain)

GeForce 8800 Ultra		39168 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 13568 (53%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce 8800 Ultra is a better choice, though only just barely. (explain)

GeForce 8800 Ultra		14688 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 1888 (15%)

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 max amount of information (counted in MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.