AMD Radeon HD 6850 X2 vs NVIDIA GeForce GTX 850M

Graphics Processor

GPU model Barts GM107
GPU variant Barts PRO (215-0798006) N15P-GT-A1
Architecture TeraScale 2 Maxwell
Foundry TSMC TSMC
Manufacturing process 40 nm 28 nm
Number of transistors 1,700 million 1,870 million
Die size 255 mm² 148 mm²

Graphics Card

Release date Sep 19th, 2011
Generation Northern Islands
Production End-of-life
Interface PCIe 2.0 x16
Reviews 105 in our database
Predecessor Evergreen
Successor Southern Islands

Clocks

GPU clock 800 MHz 902 MHz
Memory clock 1050 MHz 4.2 Gbps effective 1001 MHz 2 Gbps effective

Memory Configuration

Memory size 2 GB 2 GB
Memory type GDDR5 DDR3
Memory bus width 256 bit 128 bit
Bandwidth 134.4 GB/s 32.03 GB/s

Render Configuration

Shading units 960 640
TMUs 48 40
ROPs 32 16
Compute units 12
Cache L1 8 KB (per CU) 64 KB (per SMM)
Cache L2 512 KB 2 MB
SMM count 5

Performance

Pixel rate 25.60 GPixel/s 14.43 GPixel/s
Texture rate 38.40 GTexel/s 36.08 GTexel/s
FP32 (float) performance 1.536 TFLOPS 1,155 GFLOPS
FP64 (double) performance 36.08 GFLOPS (1:32)

Dimensions & Outputs

Slot width Dual-slot IGP
TDP 254 W 45 W
Suggested PSU 600 W
Outputs 2x DVI1x HDMI1x DisplayPort No outputs
Power connectors 2x 8-pin

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

Mobile graphics

Release date Mar 12th, 2014
Generation GeForce 800M
Production End-of-life
Interface PCIe 3.0 x16
Predecessor GeForce 700M
Successor GeForce 900M

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