AMD Radeon HD 7670A vs NVIDIA GeForce 840M

Graphics Processor

GPU model Turks GM108
GPU variant Turks XT (215-0803000) N15S-GT
Architecture TeraScale 2 Maxwell
Foundry TSMC TSMC
Manufacturing process 40 nm 28 nm
Number of transistors 716 million unknown
Die size 118 mm² unknown

Mobile graphics

Release date Jan 5th, 2012 Mar 12th, 2014
Generation All-In-One (HD 7000) GeForce 800M
Production End-of-life End-of-life
Interface MXM-A (3.0) PCIe 3.0 x8
Predecessor GeForce 700M
Successor GeForce 900M

Clocks

GPU clock 600 MHz
Memory clock 1000 MHz 4 Gbps effective 1001 MHz 2 Gbps effective
Base clock 1029 MHz
Boost clock 1124 MHz

Memory Configuration

Memory size 1024 MB 2 GB
Memory type GDDR5 DDR3
Memory bus width 128 bit 64 bit
Bandwidth 64.00 GB/s 16.02 GB/s

Render Configuration

Shading units 480 384
TMUs 24 16
ROPs 8 8
Compute units 6
Cache L1 8 KB (per CU) 64 KB (per SMM)
Cache L2 256 KB 1024 KB
SMM count 3

Performance

Pixel rate 4.800 GPixel/s 8.992 GPixel/s
Texture rate 14.40 GTexel/s 17.98 GTexel/s
FP32 (float) performance 576.0 GFLOPS 863.2 GFLOPS
FP64 (double) performance 26.98 GFLOPS (1:32)

Dimensions & Outputs

Slot width MXM Module IGP
TDP 45 W 33 W
Outputs No outputs No outputs

API Support & Features

DirectX 11.2 (11_0) 12 (11_0)
OpenGL 4.4 4.6
OpenCL 1.2 3.0
Vulkan 1.1
Shader model 5.0 5.1
CUDA 5.0

Other Features

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