Submit Benchmarks!

Submit SSD Benchmark
Submit GPU Benchmark

Compare any two graphics cards:
VS

Radeon HD 6990 vs Radeon HD 7870 XT

Intro

The Radeon HD 6990 uses a 40 nm design. AMD has set the core speed at 830 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this specific card. It features 1536 SPUs as well as 96 TAUs and 32 Rasterization Operator Units.

Compare all of that to the Radeon HD 7870 XT, which comes with a clock speed of 925 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It is made up of 1536 SPUs, 96 Texture Address Units, and 32 Raster Operation Units.

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 7870 XT 6390 points
Radeon HD 6990 5820 points
Difference: 570 (10%)

Ethereum Mining Hash Rate

Radeon HD 6990 24 Mh/s
Radeon HD 7870 XT 15 Mh/s
Difference: 9 (60%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT 185 Watts
Radeon HD 6990 375 Watts
Difference: 190 Watts (103%)

Memory Bandwidth

In theory, the Radeon HD 6990 is 67% faster than the Radeon HD 7870 XT overall, because of its greater data rate. (explain)

Radeon HD 6990 320000 MB/sec
Radeon HD 7870 XT 192000 MB/sec
Difference: 128000 (67%)

Texel Rate

The Radeon HD 6990 should be quite a bit (approximately 79%) faster with regards to anisotropic filtering than the Radeon HD 7870 XT. (explain)

Radeon HD 6990 159360 Mtexels/sec
Radeon HD 7870 XT 88800 Mtexels/sec
Difference: 70560 (79%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6990 is a better choice, and very much so. (explain)

Radeon HD 6990 53120 Mpixels/sec
Radeon HD 7870 XT 29600 Mpixels/sec
Difference: 23520 (79%)

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

Display Prices

Hide Prices

Radeon HD 6990

Amazon.com

Check prices at:

Radeon HD 7870 XT

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Display Specifications

Hide Specifications

Model Radeon HD 6990 Radeon HD 7870 XT
Manufacturer AMD AMD
Year March 2011 November 2012
Code Name Antilles Tahiti LE
Memory 2048 MB (x2) 2048 MB
Core Speed 830 MHz (x2) 925 MHz
Memory Speed 5000 MHz (x2) 6000 MHz
Power (Max TDP) 375 watts 185 watts
Bandwidth 320000 MB/sec 192000 MB/sec
Texel Rate 159360 Mtexels/sec 88800 Mtexels/sec
Pixel Rate 53120 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 1536 (x2) 1536
Texture Mapping Units 96 (x2) 96
Render Output Units 32 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 256-bit
Fab Process 40 nm 28 nm
Transistors 2640 million 4313 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 6990

Amazon.com

Check prices at:

Radeon HD 7870 XT

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Comments

Be the first to leave a comment!

Your email address will not be published. Required fields are marked *


*

WordPress Anti-Spam by WP-SpamShield