GeForce 820M vs Radeon HD 7750

Intro

Compare all of that to the Radeon HD 7750, which has a core clock speed of 800 MHz and a GDDR5 memory speed of 1125 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It features 512 SPUs, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

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

As far as performance goes, the Radeon HD 7750 should theoretically be much better than the GeForce 820M overall. (explain)

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

Texel Rate

The Radeon HD 7750 should be much (about 123%) more effective at texture filtering 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 is a lot (more or less 345%) more effective at FSAA than the GeForce 820M, and also will be capable of handling higher screen resolutions better. (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 MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher 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 maximum amount of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units 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 fill rate also depends on quite a few 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.