GeForce GTX 650 vs Radeon HD 6990

Intro

Compare those specifications to the Radeon HD 6990, which features a clock frequency of 830 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It features 1536 SPUs, 96 Texture Address Units, and 32 ROPs.

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 6990		5820 points
GeForce GTX 650		2263 points
	Difference: 3557 (157%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon HD 6990		375 Watts
	Difference: 311 Watts (486%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6990 should be 300% quicker than the GeForce GTX 650 overall, due to its higher data rate. (explain)

Radeon HD 6990		320000 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 240000 (300%)

Texel Rate

The Radeon HD 6990 should be much (more or less 371%) better at texture filtering than the GeForce GTX 650. (explain)

Radeon HD 6990		159360 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 125504 (371%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6990 is superior to the GeForce GTX 650, by far. (explain)

Radeon HD 6990		53120 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 36192 (214%)

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: Bandwidth is the max amount of data (counted in MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.