AMD Radeon HD 7770 GHz vs AMD Radeon HD 7950 Full Specs

Summary

640 Shaders 1GHz	1,792 Shaders 800MHz
1GB GDDR572GB/s	3GB GDDR5240GB/s
Peak·FP32·FP16 1.28 TFLOPS	Peak·FP32·FP16 2.87 TFLOPS
Form Factor PCIe Card	Form Factor PCIe Card
TDP 80W	TDP 200W
Power Connectors 1x 6-Pin	Power Connectors 2x 6-Pin

Highlights

Peak OPS

Peak OPS FP32 FP64 Memory Bandwidth TDP

Radeon HD 7770 GHz1.28 TFLOPSFP32

x1

Radeon HD 79502.87 TFLOPSFP32

x2.24

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Theoretical Performance

Clock Speed1000MHz UC·Boost·OC	Clock Speed800MHz UC·Boost·OC
Peak OPS 1.28 TFLOPSFP32	Peak OPS 2.87 TFLOPSFP32
FP32 1.28 TFLOPS	FP32 2.87 TFLOPS
FP64 80 GFLOPS	FP64 716.8 GFLOPS
Pixel Rate 16 GPixel/s	Pixel Rate 25.6 GPixel/s
Texture Rate 40 GTexel/s	Texture Rate 89.6 GTexel/s

Core Config

Shaders 640 Shaders	Shaders 1,792 Shaders
TMUs 40 TMUs	TMUs 112 TMUs
ROPs 16 ROPs	ROPs 32 ROPs
CUs 10 CUs	CUs 28 CUs

Clocks

Boost Clock 1GHz

Boost Clock 800MHz

Cache

L2 Cache 256KB shared

L2 Cache 768KB shared

Memory

1GB GDDR5	3GB GDDR5
Memory Bus 128-bit	Memory Bus 384-bit
Memory Speed 4.5GT/s	Memory Speed 5GT/s
Memory Bandwidth 72GB/s	Memory Bandwidth 240GB/s

Power & Thermals

TDP 80W

TDP 200W

Video Output

Multi-Monitor 3

Multi-Monitor 3

Ports

2x Mini DisplayPort 1.2	2x Mini DisplayPort 1.2
1x HDMI 1.4	1x HDMI 1.4
1x DVI-I Dual-Link	1x DVI-I Dual-Link

Encoder

Encoder Model VCE 1.0

Encoder Model VCE 1.0

Decoder

Decoder Model UVD 4.0

Decoder Model UVD 3.2

Card

Form Factor PCIe Card	Form Factor PCIe Card
PCIe 2-Slots	PCIe 2-Slots
Height 111 mm (4.37") Width 210 mm (8.27") Depth 37 mm (1.46")	Height 111 mm (4.37") Width 275 mm (10.83") Depth 38 mm (1.5")
Cooling Open-Air 1x Fan	Cooling Open-Air 1x Fan
Power Connectors 1x 6-Pin	Power Connectors 2x 6-Pin

Chip

Manufacturer AMD	Manufacturer AMD
Chip Designer AMD	Chip Designer AMD
Architecture GCN 1	Architecture GCN 1
Family Radeon HD 7000	Family Radeon HD 7000
Branding	Branding
Codename Cape Verde	Codename Tahiti
Chip Variant Cape Verde LE	Chip Variant Tahiti LE
Market Segment Desktop	Market Segment Desktop
Release Date Feb 1, 2012	Release Date Jan 31, 2012

Fabrication

Foundry TSMC	Foundry TSMC
Fabrication Node 28nm	Fabrication Node 28nm
Die Size 123mm²	Die Size 352mm²
Transistor Count 1.5 Billion	Transistor Count 4.3 Billion
Transistor Density 12.2 MTr/mm²	Transistor Density 12.25 MTr/mm²

Images

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