GeForce GT 440 1.5GB vs Radeon HD 7990

Intro

Compare those specs to the Radeon HD 7990, which comes with core 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 Texture Address Units and 32 Rasterization Operator Units.

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 7990		15520 points
GeForce GT 440 1.5GB		840 points
	Difference: 14680 (1748%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
Radeon HD 7990		375 Watts
	Difference: 319 Watts (570%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 should be 1233% quicker than the GeForce GT 440 1.5GB in general, due to its greater data rate. (explain)

Radeon HD 7990		576000 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 532800 (1233%)

Texel Rate

The Radeon HD 7990 will be a lot (more or less 1606%) more effective at anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 228944 (1606%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7990 is a better choice, by far. (explain)

Radeon HD 7990		60800 Mpixels/sec
GeForce GT 440 1.5GB		14256 Mpixels/sec
	Difference: 46544 (326%)

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 maximum amount of data (counted in MB per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.