Radeon HD 4870 X2 vs Radeon HD 7990

In this comparison between Radeon HD 4870 X2 and Radeon HD 7990 you will find out which graphics card performs better in today's games. Bear in mind that third-party versions may have more efficient cooling and higher clock speeds. This will increase cards' performance, though not by much. In addition to raw power you should also take into account the dimensions. Thicker models simply will not fit into a small mini-ITX case. The resolution of your monitor also affects the choice, since 4K gameplay requires a more powerful GPU. And don't overspend on the graphics card. Other parts of your build may also need to be upgraded, save some money for the CPU or power supply. For some people Radeon HD 4870 X2 will be the best choice, for others Radeon HD 7990 will be their preference. Study the comparison tables below and make your choice.

Main Specs

  Radeon HD 4870 X2 Radeon HD 7990
Power consumption (TDP) 286 Watt 375 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x16
Supplementary power connectors 1x 6-pin + 1x 8-pin 2x 8-pin
Memory type GDDR5 GDDR5
Maximum RAM amount 1 GB 3 GB
Display Connectors 2x DVI, 1x S-Video 1x DVI, 4x mini-DisplayPort
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  • Radeon HD 7990 has 31% more power consumption, than Radeon HD 4870 X2.
  • Radeon HD 4870 X2 is connected by PCIe 2.0 x16, and Radeon HD 7990 uses PCIe 3.0 x16 interface.
  • Radeon HD 7990 has 2 GB more memory, than Radeon HD 4870 X2.
  • Both cards are used in Desktops.
  • Radeon HD 4870 X2 is build with TeraScale architecture, and Radeon HD 7990 - with GCN 1.0.
  • Core clock speed of Radeon HD 7990 is 250 MHz higher, than Radeon HD 4870 X2.
  • Radeon HD 4870 X2 is manufactured by 55 nm process technology, and Radeon HD 7990 - by 28 nm process technology.
  • Radeon HD 7990 is 40 mm longer, than Radeon HD 4870 X2.
  • Memory clock speed of Radeon HD 7990 is 2400 MHz higher, than Radeon HD 4870 X2.

Game benchmarks

high / 1080p 3−4 35−40
ultra / 1080p 1−2 21−24
QHD / 1440p 0−1 16−18
4K / 2160p 10−11
low / 720p 14−16 60−65
medium / 1080p 6−7 40−45
The average gaming FPS of Radeon HD 7990 in Assassin's Creed Odyssey is 583% more, than Radeon HD 4870 X2.

Full Specs

  Radeon HD 4870 X2 Radeon HD 7990
Architecture TeraScale GCN 1.0
Code name R700 Malta
Type Desktop Desktop
Release date 12 August 2008 24 April 2013
Pipelines 800 2048
Core clock speed 700 MHz 950 MHz
Boost Clock 1000 MHz
Transistor count 956 million 4,313 million
Manufacturing process technology 55 nm 28 nm
Texture fill rate 28.00 128.0
Floating-point performance 2x 1,120.0 gflops 2x 4,096 gflops
Length 267 mm 307 mm
Memory bus width 256 Bit 384 Bit
Memory clock speed 3600 MHz 6000 MHz
Memory bandwidth 115.2 GB/s 288.0 GB/s
DirectX 10.1 (10_1) 12 (11_1)
Shader Model 4.1 5.1
OpenGL 3.3 4.6
OpenCL 1.1 1.2
Vulkan N/A 1.2.131
Bitcoin / BTC (SHA256) 459 Mh/s
Ethereum / ETH (DaggerHashimoto) 44 Mh/s
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