Radeon HD 4350 vs Radeon HD 7990

Intro

Compare all of that to the Radeon HD 7990, which comes with clock speeds of 950 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4350		22 Watts
Radeon HD 7990		375 Watts
	Difference: 353 Watts (1605%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 should be 7100% quicker than the Radeon HD 4350 in general, because of its higher bandwidth. (explain)

Radeon HD 7990		576000 MB/sec
Radeon HD 4350		8000 MB/sec
	Difference: 568000 (7100%)

Texel Rate

The Radeon HD 7990 is a lot (more or less 5187%) better at AF than the Radeon HD 4350. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon HD 4350		4600 Mtexels/sec
	Difference: 238600 (5187%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7990 is the winner, by a large margin. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon HD 4350		2300 Mpixels/sec
	Difference: 58500 (2543%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.