Radeon HD 4350 vs Radeon HD 6790

Intro

Compare that to the Radeon HD 6790, which makes use of a 40 nm design. AMD has set the core speed at 840 MHz. The GDDR5 RAM is set to run at a speed of 1050 MHz on this card. It features 800 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4350		22 Watts
Radeon HD 6790		150 Watts
	Difference: 128 Watts (582%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6790 is 1580% quicker than the Radeon HD 4350 overall, because of its higher data rate. (explain)

Radeon HD 6790		134400 MB/sec
Radeon HD 4350		8000 MB/sec
	Difference: 126400 (1580%)

Texel Rate

The Radeon HD 6790 is much (more or less 630%) better at anisotropic filtering than the Radeon HD 4350. (explain)

Radeon HD 6790		33600 Mtexels/sec
Radeon HD 4350		4600 Mtexels/sec
	Difference: 29000 (630%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 6790 is superior to the Radeon HD 4350, by a large margin. (explain)

Radeon HD 6790		13440 Mpixels/sec
Radeon HD 4350		2300 Mpixels/sec
	Difference: 11140 (484%)

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 data (in units of MB per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.