Radeon HD 4350 vs Radeon HD 7770

Intro

Compare all that to the Radeon HD 7770, which makes use of a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 memory is set to run at a frequency of 1125 MHz on this specific card. It features 640 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 7770		80 Watts
	Difference: 58 Watts (264%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7770 should theoretically be quite a bit better than the Radeon HD 4350 overall. (explain)

Radeon HD 7770		72000 MB/sec
Radeon HD 4350		8000 MB/sec
	Difference: 64000 (800%)

Texel Rate

The Radeon HD 7770 is quite a bit (about 770%) faster with regards to anisotropic filtering than the Radeon HD 4350. (explain)

Radeon HD 7770		40000 Mtexels/sec
Radeon HD 4350		4600 Mtexels/sec
	Difference: 35400 (770%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7770 is a better choice, and very much so. (explain)

Radeon HD 7770		16000 Mpixels/sec
Radeon HD 4350		2300 Mpixels/sec
	Difference: 13700 (596%)

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 (in units of megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, it must 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, 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 is calculated 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number 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 outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.