GeForce GT 645M vs Radeon R9 380

When comparing GeForce GT 645M and Radeon R9 380, we look primarily at benchmarks and game tests. But it is not only about the numbers. Often you can find third-party models with higher clock speeds, better cooling, or a customizable RGB lighting. Not all of them will have all the features you need. Another thing to consider is the port selection. Most graphics cards have at least one DisplayPort and HDMI interface, but some monitors require DVI. Before you buy, check the TDP of the graphics card - this characteristic will help you estimate the consumption of the graphics card. You may even have to upgrade your PSU to meet its requirements. An important factor when choosing between GeForce GT 645M and Radeon R9 380 is the price. Does the additional cost justify the performance hit? Our comparison should help you make the right decision.

GeForce GT 645M is a Laptop Graphics Card

Note: GeForce GT 645M 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 GeForce GT 645M here:

Main Specs

  GeForce GT 645M Radeon R9 380
Power consumption (TDP) 32 Watt 190 Watt
Interface PCIe 3.0 x16 PCIe 3.0 x16
Supplementary power connectors 2 x 6-pin
Memory type DDR3\GDDR5 GDDR5
Maximum RAM amount 2 GB 4 GB
Display Connectors No outputs 2x DVI, 1x HDMI, 1x DisplayPort
  Check Price Check Price
  • Radeon R9 380 has 493% more power consumption, than GeForce GT 645M.
  • Both video cards are using PCIe 3.0 x16 interface connection to a motherboard.
  • Radeon R9 380 has 2 GB more memory, than GeForce GT 645M.
  • GeForce GT 645M is used in Laptops, and Radeon R9 380 - in Desktops.
  • GeForce GT 645M is build with Kepler architecture, and Radeon R9 380 - with GCN.
  • GeForce GT 645M and Radeon R9 380 are manufactured by 28 nm process technology.
  • Memory clock speed of GeForce GT 645M is 830 MHz higher, than Radeon R9 380.

Game benchmarks

high / 1080p 1−2 35−40
ultra / 1080p 0−1 21−24
QHD / 1440p 0−1 16−18
4K / 2160p 10−11
low / 720p 12−14 60−65
medium / 1080p 2−3 40−45
The average gaming FPS of Radeon R9 380 in Assassin's Creed Odyssey is 840% more, than GeForce GT 645M.

Full Specs

  GeForce GT 645M Radeon R9 380
Architecture Kepler GCN
Code name N13P-GS Tonga Pro
Type Laptop Desktop
Release date 22 March 2012 26 June 2015
Pipelines 384 1792
Boost Clock 970 MHz
Transistor count 1,270 million 5,000 million
Manufacturing process technology 28 nm 28 nm
Texture fill rate 22.7 billion/sec 108.6
Floating-point performance 544.5 gflops 3,476 gflops
Length 221 mm
Memory bus width 128bit 256 Bit
Memory clock speed 1800 MHz 970 MHz
Memory bandwidth 182.4 GB/s
Shared memory - -
DirectX 12 API
Shader Model 5.1 6.3
OpenGL 4.5 4.5
OpenCL 1.1 2.0
Vulkan 1.1.126 +
CUDA +
Monero / XMR (CryptoNight) 0.48 kh/s
FreeSync +
CUDA cores 384
Bus support PCI Express 2.0, PCI Express 3.0 PCIe 3.0
HDMI + +
HDCP +
Maximum VGA resolution Up to 2048x1536
3D Blu-Ray +
Bitcoin / BTC (SHA256) 19 Mh/s 404 Mh/s
Laptop size medium sized
Optimus +
Eyefinity +
HD3D +
PowerTune +
TrueAudio +
ZeroCore +
Mantle +
Design reference
Bridgeless CrossFire +
Number of Eyefinity displays 6
DisplayPort support +
CrossFire +
VCE +
DDMA audio +
Decred / DCR (Decred) 0.66 Gh/s
Ethereum / ETH (DaggerHashimoto) 18 Mh/s
Zcash / ZEC (Equihash) 168.45 Sol/s
Compute units 28
Form factor full height / full length / dual slot
High bandwidth memory (HBM) -
LiquidVR +
FRTC +
  Check Price Check Price