AMD Radeon HD 6450 vs AMD Radeon HD 6990 Full Specs - HMC

160 Shaders 750MHz	3,072 Shaders 830MHz
1GB DDR312.8GB/s	4GB GDDR5320GB/s
·· 240 GFLOPS	·· 5.1 TFLOPS
Form Factor PCIe Card	Form Factor PCIe Card
TDP 27W	TDP 375W
Power Connectors -	Power Connectors 2x 8-Pin

Clock Speed ···	Clock Speed ··
Peak OPS 240 GFLOPSFP32	Peak OPS 5.1 TFLOPSFP32
FP32 240 GFLOPS	FP32 5.1 TFLOPS
-	FP64 1.27 TFLOPS
Pixel Rate 3 GPixel/s	Pixel Rate 26.6 GPixel/s
Texture Rate 6 GTexel/s	Texture Rate 79.7 GTexel/s

Shaders 160 Shaders	Shaders 3,072 Shaders
TMUs 8 TMUs	TMUs 192 TMUs
ROPs 4 ROPs	ROPs 64 ROPs
CUs 2 CUs	CUs 48 CUs

Base Clock 625MHz	Base Clock -
Boost Clock 750MHz	Boost Clock 830MHz

L2 Cache

128KB shared

L2 Cache

512KB shared

1GB DDR3	4GB GDDR5
Memory Bus 64-bit	Memory Bus 256-bit
Memory Speed 1.6GT/s	Memory Speed 5GT/s
Memory Bandwidth 12.8GB/s	Memory Bandwidth 320GB/s
ECC No	ECC No

TDP

27W

TDP

375W

Multi-Monitor

2

Multi-Monitor

4

-

1x HDMI 1.3

1x DVI-I Dual-Link

1x VGA

4x Mini DisplayPort 1.1

-

1x DVI-I Dual-Link

-

Decoder Model UVD 3.0	Decoder Model UVD 3.1
Codec MPEG-1 MPEG-2 MPEG-4 VC-1 AVC (H.264)	Codec MPEG-1 MPEG-2 MPEG-4 VC-1 AVC (H.264)

Form Factor PCIe Card	Form Factor PCIe Card
PCIe 1-Slots	PCIe 2-Slots
-	Height 115 mm (4.53") Width 310 mm (12.2") Depth 40 mm (1.57")
Cooling Open-Air 1x Fan	Cooling Blower 1x Fan
Power Connectors -	Power Connectors 2x 8-Pin

Manufacturer AMD	Manufacturer AMD
Chip Designer AMD	Chip Designer AMD
Architecture TeraScale 2	Architecture TeraScale 3
Family Radeon HD 6000	Family Radeon HD 6000
Branding	Branding
Codename Caicos	Codename Cayman
Chip Variant Caicos	Chip Variant Cayman CE
Market Segment Desktop	Market Segment Desktop
Release Date Apr 7, 2011	Release Date Mar 8, 2011

Foundry TSMC	Foundry TSMC
Fabrication Node 40nm	Fabrication Node 40nm
Die Size 67mm²	Die Size 389mm²
Transistor Count 370 Million	Transistor Count 2.6 Billion
Transistor Density 5.52 MTr/mm²	Transistor Density 6.79 MTr/mm²