AMD Radeon HD 6870 X2 vs AMD Radeon HD 7770 GHz Edition

Edit	AMD Radeon HD 6870 X2 Check Price	AMD Radeon HD 7770 GHz Edition Check Price

Table of Contents

Graphics Processor
Graphics Card
Clocks
Memory Configuration
Render Configuration
Performance
Dimensions & Outputs
API Support & Features
Other Features

Graphics Processor

GPU model	Barts	Cape Verde
GPU variant	Barts XT (215-0798000)	Cape Verde XT
Architecture	TeraScale 2	GCN 1.0
Foundry	TSMC	TSMC
Manufacturing process	40 nm	28 nm
Number of transistors	1,700 million	1,500 million
Die size	255 mm²	123 mm²

Graphics Card

Release date	Jul 8th, 2011	Feb 15th, 2012
Generation	Northern Islands	Southern Islands
Production	End-of-life	End-of-life
Launch price	520 USD	159 USD
Interface	PCIe 2.0 x16	PCIe 3.0 x16
Reviews	170 in our database	97 in our database
Predecessor	Evergreen	Northern Islands
Successor	Southern Islands	Sea Islands

Clocks

GPU clock	900 MHz	1000 MHz
Memory clock	1050 MHz 4.2 Gbps effective	1125 MHz 4.5 Gbps effective

Memory Configuration

Memory size	1024 MB	1024 MB
Memory type	GDDR5	GDDR5
Memory bus width	256 bit	128 bit
Bandwidth	134.4 GB/s	72.00 GB/s

Render Configuration

Shading units	1120	640
TMUs	56	40
ROPs	32	16
Compute units	14	10
Cache L1	8 KB (per CU)	16 KB (per CU)
Cache L2	512 KB	256 KB

Performance

Pixel rate	28.80 GPixel/s	16.00 GPixel/s
Texture rate	50.40 GTexel/s	40.00 GTexel/s
FP32 (float) performance	2.016 TFLOPS	1,280 GFLOPS
FP64 (double) performance	—	80.00 GFLOPS (1:16)

Dimensions & Outputs

Slot width	Dual-slot	Dual-slot
Length	304 mm 12 inches	210 mm 8.3 inches
TDP	300 W	80 W
Suggested PSU	700 W	250 W
Outputs	2x DVI1x HDMI2x mini-DisplayPort	1x DVI1x HDMI2x mini-DisplayPort
Power connectors	—	1x 6-pin
Board number	—	C441, C468

API Support & Features

DirectX	11.2 (11_0)	12 (11_1)
OpenGL	4.4	4.6
OpenCL	1.2	1.2
Vulkan	—	1.2
Shader model	5.0	5.1

Other Features

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