AMD Radeon HD 6870 X2 vs NVIDIA GeForce GTX 745 OEM

Table of Contents

Graphics Processor

GPU model Barts GM107
GPU variant Barts XT (215-0798000) GM107-220-A2
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 Jul 8th, 2011 Feb 18th, 2014
Generation Northern Islands GeForce 700
Production End-of-life End-of-life
Launch price 520 USD
Interface PCIe 2.0 x16 PCIe 3.0 x16
Reviews 170 in our database
Predecessor Evergreen GeForce 600
Successor Southern Islands GeForce 900

Clocks

GPU clock 900 MHz 1033 MHz
Memory clock 1050 MHz 4.2 Gbps effective 900 MHz 1800 Mbps effective

Memory Configuration

Memory size 1024 MB 4 GB
Memory type GDDR5 DDR3
Memory bus width 256 bit 128 bit
Bandwidth 134.4 GB/s 28.80 GB/s

Render Configuration

Shading units 1120 384
TMUs 56 24
ROPs 32 16
Compute units 14
Cache L1 8 KB (per CU) 64 KB (per SMM)
Cache L2 512 KB 2 MB
SMM count 3

Performance

Pixel rate 28.80 GPixel/s 16.53 GPixel/s
Texture rate 50.40 GTexel/s 24.79 GTexel/s
FP32 (float) performance 2.016 TFLOPS 793.3 GFLOPS
FP64 (double) performance 24.79 GFLOPS (1:32)

Dimensions & Outputs

Slot width Dual-slot Single-slot
Length 304 mm 12 inches 145 mm 5.7 inches
TDP 300 W 55 W
Suggested PSU 700 W 250 W
Outputs 2x DVI1x HDMI2x mini-DisplayPort 1x DVI1x HDMI1x VGA
Power connectors None
Board number P2012 SKU 50

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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