GeForce 820M vs Radeon HD 7750

Intro

Compare those specs to the Radeon HD 7750, which uses a 28 nm design. AMD has set the core speed at 800 MHz. The GDDR5 RAM works at a frequency of 1125 MHz on this particular card. It features 512 SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7750		2240 points
GeForce 820M		850 points
	Difference: 1390 (164%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Radeon HD 7750		55 Watts
	Difference: 40 Watts (267%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7750 is 350% faster than the GeForce 820M overall, due to its higher data rate. (explain)

Radeon HD 7750		72000 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 56000 (350%)

Texel Rate

The Radeon HD 7750 should be quite a bit (more or less 123%) more effective at AF than the GeForce 820M. (explain)

Radeon HD 7750		25600 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 14096 (123%)

Pixel Rate

The Radeon HD 7750 should be much (about 345%) better at FSAA than the GeForce 820M, and also should be able to handle higher resolutions more effectively. (explain)

Radeon HD 7750		12800 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 9924 (345%)

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 megabytes per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number 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 also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.