AMD Radeon HD 8950 vs AMD Radeon HD 8990 Full Specs

Summary

1,792 Shaders 925MHz	4,096 Shaders 1GHz
3GB GDDR5240GB/s	6GB GDDR5576GB/s
Peak·FP32·FP16 3.31 TFLOPS	Peak·FP32·FP16 8.19 TFLOPS
Form Factor PCIe Card	Form Factor PCIe Card
TDP 225W	TDP 375W
Power Connectors 1x 8-Pin 1x 6-Pin	Power Connectors 2x 8-Pin -

Highlights

Peak OPS

Peak OPS FP32 FP64 Memory Bandwidth TDP

Radeon HD 89503.31 TFLOPSFP32

x1

Radeon HD 89908.19 TFLOPSFP32 (2x 4.1 TFLOPS)

x2.47

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Theoretical Performance

Clock Speed925MHz UC·Base·Boost·OC	Clock Speed1000MHz UC·Base·Boost·OC
Peak OPS 3.31 TFLOPSFP32	Peak OPS 8.19 TFLOPSFP32
FP32 3.31 TFLOPS	FP32 8.19 TFLOPS
FP64 828.8 GFLOPS	FP64 2.05 TFLOPS
Pixel Rate 29.6 GPixel/s	Pixel Rate 32 GPixel/s
Texture Rate 103.6 GTexel/s	Texture Rate 128 GTexel/s

Core Config

Shaders 1,792 Shaders	Shaders 4,096 Shaders
TMUs 112 TMUs	TMUs 256 TMUs
ROPs 32 ROPs	ROPs 64 ROPs
CUs 28 CUs	CUs 64 CUs

Clocks

Base Clock 850MHz	Base Clock 950MHz
Boost Clock 925MHz	Boost Clock 1GHz

Cache

L2 Cache 768KB shared

L2 Cache 768KB shared

Memory

3GB GDDR5	6GB GDDR5
Memory Bus 384-bit	Memory Bus 384-bit
Memory Speed 5GT/s	Memory Speed 6GT/s
Memory Bandwidth 240GB/s	Memory Bandwidth 576GB/s

Power & Thermals

TDP 225W

TDP 375W

Video Output

Multi-Monitor 3

Multi-Monitor 4

Ports

2x Mini DisplayPort 1.2	4x Mini DisplayPort 1.2
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 3.2

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 267 mm (10.51") Depth 38 mm (1.5")	Height 115 mm (4.53") Width 304 mm (11.97") Depth 38 mm (1.5")
Cooling Blower 1x Fan	Cooling Open-Air 3x Fans
Power Connectors 1x 8-Pin, 1x 6-Pin	Power Connectors 2x 8-Pin

Chip

Manufacturer AMD	Manufacturer AMD
Chip Designer AMD	Chip Designer AMD
Architecture GCN 1	Architecture GCN 1
Family Radeon HD 8000	Family Radeon HD 8000
Branding	Branding
Codename Tahiti	Codename Tahiti
Chip Variant Tahiti LE	Chip Variant Tahiti LE
Market Segment Desktop	Market Segment Desktop
Release Date Jan 8, 2013	Release Date Apr 24, 2013

Fabrication

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

Images

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