AMD Radeon HD 6670 vs ATI Radeon HD 4870 X2

Table of Contents

Graphics Processor

GPU model Turks R700
GPU variant Turks XT (215-0803000) R700 XT (215-0669045)
Architecture TeraScale 2 TeraScale
Foundry TSMC TSMC
Manufacturing process 40 nm 55 nm
Number of transistors 716 million 956 million
Die size 118 mm² 256 mm²

Graphics Card

Release date Apr 19th, 2011 Aug 12th, 2008
Generation Northern Islands Radeon R700
Production End-of-life End-of-life
Launch price 99 USD 550 USD
Interface PCIe 2.0 x16 PCIe 2.0 x16
Reviews 35 in our database 79 in our database
Predecessor Evergreen Radeon R600
Successor Southern Islands Evergreen

Clocks

GPU clock 800 MHz 750 MHz
Memory clock 1000 MHz 4 Gbps effective 900 MHz 3.6 Gbps effective

Memory Configuration

Memory size 1024 MB 1024 MB
Memory type GDDR5 GDDR5
Memory bus width 128 bit 256 bit
Bandwidth 64.00 GB/s 115.2 GB/s

Render Configuration

Shading units 480 800
TMUs 24 40
ROPs 8 16
Compute units 6 10
Cache L1 8 KB (per CU) 16 KB (per CU)
Cache L2 256 KB 256 KB

Performance

Pixel rate 6.400 GPixel/s 12.00 GPixel/s
Texture rate 19.20 GTexel/s 30.00 GTexel/s
FP32 (float) performance 768.0 GFLOPS 1,200 GFLOPS
FP64 (double) performance 240.0 GFLOPS (1:5)

Dimensions & Outputs

Slot width Single-slot Dual-slot
Length 168 mm 6.6 inches 267 mm 10.5 inches
TDP 66 W 286 W
Suggested PSU 250 W 600 W
Outputs 1x DVI1x HDMI1x VGA 2x DVI1x S-Video
Power connectors None 1x 6-pin + 1x 8-pin
Board number C334 B509-37
Width 111 mm 4.4 inches
Height 38 mm 1.5 inches

API Support & Features

DirectX 11.2 (11_0) 10.1 (10_1)
OpenGL 4.4 3.3
OpenCL 1.2 1.1
Vulkan
Shader model 5.0 4.1

Other Features

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