Radeon HD 4890 vs Radeon RX 640

Find out if it is worth upgrading your current GPU setup by comparing Radeon HD 4890 and Radeon RX 640. 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 Radeon HD 4890 and Radeon RX 640. 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.

Radeon RX 640 is a Laptop Graphics Card

Note: Radeon RX 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 Radeon RX 640 here:

Main Specs

  Radeon HD 4890 Radeon RX 640
Power consumption (TDP) 190 Watt 50 Watt
Interface PCIe 2.0 x16 PCIe 3.0 x8
Supplementary power connectors 2x 6-pin None
Memory type GDDR5 GDDR5
Maximum RAM amount 1 GB 4 GB
Display Connectors 2x DVI, 1x S-Video 1x DVI, 1x HDMI, 1x DisplayPort
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  • Radeon HD 4890 has 280% more power consumption, than Radeon RX 640.
  • Radeon HD 4890 is connected by PCIe 2.0 x16, and Radeon RX 640 uses PCIe 3.0 x8 interface.
  • Radeon RX 640 has 3 GB more memory, than Radeon HD 4890.
  • Radeon HD 4890 is used in Desktops, and Radeon RX 640 - in Laptops.
  • Radeon HD 4890 is build with TeraScale architecture, and Radeon RX 640 - with Polaris.
  • Core clock speed of Radeon RX 640 is 368 MHz higher, than Radeon HD 4890.
  • Radeon HD 4890 is manufactured by 55 nm process technology, and Radeon RX 640 - by 14 nm process technology.
  • Memory clock speed of Radeon RX 640 is 2100 MHz higher, than Radeon HD 4890.

Game benchmarks

high / 1080p 7−8 5−6
ultra / 1080p 4−5 3−4
QHD / 1440p 0−1 2−3
low / 720p 16−18 16−18
medium / 1080p 8−9 7−8
The average gaming FPS of Radeon HD 4890 in Assassin's Creed Odyssey is 12% more, than Radeon RX 640.

Full Specs

  Radeon HD 4890 Radeon RX 640
Architecture TeraScale Polaris
Code name RV790 Polaris 12
Type Desktop Laptop
Release date 2 April 2009 12 August 2019
Pipelines 800 640
Core clock speed 850 MHz 1218 MHz
Boost Clock 1218 MHz
Transistor count 959 million 2,200 million
Manufacturing process technology 55 nm 14 nm
Texture fill rate 34.00 38.98
Floating-point performance 1,360.0 gflops
Length 241 mm
Memory bus width 256 Bit 64 Bit
Memory clock speed 3900 MHz 6000 MHz
Memory bandwidth 124.8 GB/s 112.0 GB/s
Shared memory -
DirectX 10.1 (10_1) 12 (12_0)
Shader Model 4.1 6.4
OpenGL 3.3 4.6
OpenCL 1.1 2.0
Vulkan N/A 1.2.131
FreeSync +
Laptop size large
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