Iris Plus Graphics 640 vs Radeon HD 7990

Find out if it is worth upgrading your current GPU setup by comparing Iris Plus Graphics 640 and Radeon HD 7990. Here you can take a closer look at graphics cards specs, such as core clock speed, memory type and size, display connectors, etc. The price, overall benchmark and gaming performances are usually defining factors when it comes to choosing between Iris Plus Graphics 640 and Radeon HD 7990. Make sure that the graphics card has compatible dimensions and will properly fit in your new or current computer case. Also these graphics cards may have different system power recommendations, so take that into consideration and upgrade your PSU if necessary.

Iris Plus Graphics 640 is a Laptop Graphics Card

Note: Iris Plus Graphics 640 is only used in laptop graphics. It has lower GPU clock speed compared to the desktop variant, which results in lower power consumption, but also 10-30% lower gaming performance. Check available laptop models with Iris Plus Graphics 640 here:

Main Specs

  Iris Plus Graphics 640 Radeon HD 7990
Power consumption (TDP) 15 Watt 375 Watt
Interface PCIe 3.0 x1 PCIe 3.0 x16
Supplementary power connectors 2x 8-pin
Memory type DDR3L/LPDDR3/DDR4 GDDR5
Maximum RAM amount 32 GB 3 GB
Display Connectors No outputs 1x DVI, 4x mini-DisplayPort
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  • Radeon HD 7990 has 2400% more power consumption, than Iris Plus Graphics 640.
  • Iris Plus Graphics 640 is connected by PCIe 3.0 x1, and Radeon HD 7990 uses PCIe 3.0 x16 interface.
  • Iris Plus Graphics 640 has 29 GB more memory, than Radeon HD 7990.
  • Iris Plus Graphics 640 is used in Laptops, and Radeon HD 7990 - in Desktops.
  • Iris Plus Graphics 640 is build with Gen. 9.5 Kaby Lake architecture, and Radeon HD 7990 - with GCN 1.0.
  • Core clock speed of Radeon HD 7990 is 650 MHz higher, than Iris Plus Graphics 640.
  • Iris Plus Graphics 640 is manufactured by 14 nm process technology, and Radeon HD 7990 - by 28 nm process technology.

Game benchmarks

high / 1080p 6−7 35−40
ultra / 1080p 4−5 21−24
QHD / 1440p 0−1 16−18
4K / 2160p 10−11
low / 720p 16−18 60−65
medium / 1080p 8−9 40−45
The average gaming FPS of Radeon HD 7990 in Assassin's Creed Odyssey is 355% more, than Iris Plus Graphics 640.

Full Specs

  Iris Plus Graphics 640 Radeon HD 7990
Architecture Gen. 9.5 Kaby Lake GCN 1.0
Code name Kaby Lake GT3e Malta
Type Laptop Desktop
Release date 3 January 2017 24 April 2013
Pipelines 48 2048
Core clock speed 300 MHz 950 MHz
Boost Clock 1050 MHz 1000 MHz
Transistor count 189 million 4,313 million
Manufacturing process technology 14 nm 28 nm
Texture fill rate 52.80 128.0
Floating-point performance 2x 4,096 gflops
Length 307 mm
Memory bus width 64/128 Bit 384 Bit
Memory clock speed 6000 MHz
Memory bandwidth 288.0 GB/s
Shared memory +
DirectX 12 (12_1) 12 (11_1)
Shader Model 6.4 5.1
OpenGL 4.6 4.6
OpenCL 2.1 1.2
Vulkan 1.1.103 1.2.131
Bitcoin / BTC (SHA256) 459 Mh/s
Ethereum / ETH (DaggerHashimoto) 44 Mh/s
Quick Sync +
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