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GeForce RTX 2080 Ti vs Radeon HD 7990

Intro

The GeForce RTX 2080 Ti has core clock speeds of 1350 MHz on the GPU, and 1750 MHz on the 11264 MB of GDDR6 memory. It features 4352 SPUs as well as 272 TAUs and 88 Rasterization Operator Units.

Compare those specs to the Radeon HD 7990, which has GPU clock speed of 950 MHz, and 3072 MB of GDDR5 memory set to run at 1500 MHz through a 384-bit bus. It also is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

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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

GeForce RTX 2080 Ti 31381 points
Radeon HD 7990 15520 points
Difference: 15861 (102%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 2080 Ti 250 Watts
Radeon HD 7990 375 Watts
Difference: 125 Watts (50%)

Memory Bandwidth

As far as performance goes, the GeForce RTX 2080 Ti should theoretically be just a bit superior to the Radeon HD 7990 overall. (explain)

GeForce RTX 2080 Ti 630784 MB/sec
Radeon HD 7990 576000 MB/sec
Difference: 54784 (10%)

Texel Rate

The GeForce RTX 2080 Ti will be quite a bit (approximately 51%) better at anisotropic filtering than the Radeon HD 7990. (explain)

GeForce RTX 2080 Ti 367200 Mtexels/sec
Radeon HD 7990 243200 Mtexels/sec
Difference: 124000 (51%)

Pixel Rate

The GeForce RTX 2080 Ti should be quite a bit (approximately 95%) more effective at FSAA than the Radeon HD 7990, and also will be able to handle higher resolutions while still performing well. (explain)

GeForce RTX 2080 Ti 118800 Mpixels/sec
Radeon HD 7990 60800 Mpixels/sec
Difference: 58000 (95%)

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

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GeForce RTX 2080 Ti

Amazon.com

Check prices at:

Radeon HD 7990

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

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Model GeForce RTX 2080 Ti Radeon HD 7990
Manufacturer nVidia AMD
Year September 2018 April 2013
Code Name TU102-300A-K1-A1 Malta
Memory 11264 MB 3072 MB (x2)
Core Speed 1350 MHz 950 MHz (x2)
Memory Speed 1750 GB/s 6000 MHz (x2)
Power (Max TDP) 250 watts 375 watts
Bandwidth 630784 MB/sec 576000 MB/sec
Texel Rate 367200 Mtexels/sec 243200 Mtexels/sec
Pixel Rate 118800 Mpixels/sec 60800 Mpixels/sec
Unified Shaders 4352 2048 (x2)
Texture Mapping Units 272 128 (x2)
Render Output Units 88 32 (x2)
Bus Type GDDR6 GDDR5
Bus Width 352-bit 384-bit (x2)
Fab Process 12 nm 28 nm
Transistors (Unknown) million 4313 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 11.1
OpenGL Version OpenGL 4.6 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce RTX 2080 Ti

Amazon.com

Check prices at:

Radeon HD 7990

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.

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