AMD Instinct MI250X vs AMD Radeon RX 6900 XT Full Specs

Summary

14,080 Shaders 1.7GHz	5,120 Shaders 2.25GHz
128GB HBM2e3.28TB/s	16GB GDDR6512GB/s
Peak·FP32·FP16 47.87 TFLOPS	Peak·FP32·FP16 23.04 TFLOPS
Form Factor OAM Module	Form Factor PCIe Card
TDP 560W	TDP 300W
Power Connectors -	Power Connectors 2x 8-Pin

Highlights

Peak OPS

Peak OPS FP32 FP16 Tensor FP16-16 Tensor FP16-32 Tensor FP32 FP64 Tensor FP64 Tensor BF16 Tensor INT8 Tensor INT4 Memory Bandwidth TDP

Instinct MI250X383 TOPSINT4 Tensor

x8.31

Radeon RX 6900 XT46.08 TFLOPSFP16

x1

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Theoretical Performance

Clock Speed1700MHz UC·Base·Boost·OC	Clock Speed2250MHz UC·Base·Boost·OC
Peak OPS 383 TOPSINT4 Tensor	Peak OPS 46.08 TFLOPSFP16
Tensor FP16-16 383 TFLOPS Tensor FP16-32 383 TFLOPS	-
Tensor BF16 383 TFLOPS	-
FP32 47.87 TFLOPS Tensor FP32 95.74 TFLOPS	FP32 23.04 TFLOPS Tensor FP32 -
FP64 47.87 TFLOPS Tensor FP64 95.74 TFLOPS	FP64 1.44 TFLOPS Tensor FP64 -
Tensor INT4 383 TOPS	Tensor INT4 -
Tensor INT8 383 TOPS	-
Pixel Rate -	Pixel Rate 288 GPixel/s
Texture Rate 1.5 TTexel/s	Texture Rate 720 GTexel/s

Core Config

Shaders 14,080 Shaders	Shaders 5,120 Shaders
TMUs 880 TMUs	TMUs 320 TMUs
ROPs -	ROPs 128 ROPs
Tensor Cores 880 T-Cores	Tensor Cores -
RT Cores -	RT Cores 80 RT-Cores
CUs 220 CUs	CUs 80 CUs

Clocks

Base Clock 1GHz	Base Clock 1.82GHz
Boost Clock 1.7GHz	Boost Clock 2.25GHz

Cache

L0 Cache -	L0 Cache 32KB/WGP
L1 16KB/CU	L1 128KB/Array
L2 Cache 16MB shared	L2 Cache 4MB shared
L3 Cache -	L3 Cache 128MB shared
L3 Bandwidth -	L3 Bandwidth 1.66TB/s

Memory

128GB HBM2e	16GB GDDR6
Memory Bus 8192-bit	Memory Bus 256-bit
Memory Speed 3.2GT/s	Memory Speed 16GT/s
Memory Bandwidth 3.28TB/s	Memory Bandwidth 512GB/s
ECC Yes	ECC No

Power & Thermals

TDP 560W	TDP 300W
Max Temp -	Max Temp 110°C Max

Video Output

Max Resolution -	Max Resolution 7680x4320
Refresh Rate Calculator -	Refresh Rate Calculator 7680x4320 Resolution8K UHD Refresh Rate 120Hz
Multi-Monitor -	Multi-Monitor 4
Adaptive Sync -	Adaptive Sync FreeSync
DSC Not Supported	DSC Supported
HDCP -	HDCP HDCP 2.3

Ports

-	2x DisplayPort 1.4 1x HDMI 2.1 1x USB-C

API Support

Shader Model -	Shader Model 6.5
-	DirectX DirectX 12 Direct3D 12_2
OpenGL - OpenCL 3 Vulkan -	OpenGL 4.6 OpenCL 2.1 Vulkan 1.2
GFX 9.4	GFX 10.3

Encoder

Encoder 2x VCN 2.6	Encoder VCN 3.0
Codec AVC (H.264) HEVC (H.265)	Codec AVC (H.264) HEVC (H.265)

Decoder

Decoder 2x VCN 2.6	Decoder VCN 3.0
Codec -	Codec MPEG-1 MPEG-2 MPEG-4 JPEG VC-1 VP9 AVC (H.264) HEVC (H.265) AV1

Card

Form Factor OAM Module	Form Factor PCIe Card
PCIe PCIe 4.0 x16 -	PCIe PCIe 4.0 x16 2.5-Slots
-	Height 120mm (4.72") Width 267mm (10.51") Depth 50mm (1.97")
Cooling Passive -	Cooling Open-Air 3x Fans
Power Connectors -	Power Connectors 2x 8-Pin
Multi-GPU Multi-GPU Support Supported Multi-GPU Type Infinity Fabric	Multi-GPU Multi-GPU Support Supported Multi-GPU Type Bridgeless

Chip

Manufacturer AMD	Manufacturer AMD
Chip Designer AMD	Chip Designer AMD
Architecture CDNA 2	Architecture RDNA 2
Family Instinct	Family Radeon RX 6000
Branding	Branding
Codename Aldebaran	Codename Sienna Cichlid
Chip Variant Aldebaran XTX	Chip Variant Navi 21 XL
Market Segment Server	Market Segment Desktop
Release Date Nov 8, 2021	Release Date Dec 8, 2020

Fabrication

Foundry TSMC	Foundry TSMC
Fabrication Node N6	Fabrication Node N7
Die Size 1448mm²	Die Size 520mm²
Transistor Count 56B	Transistor Count 26.8B
Transistor Density 38.67 MTr/mm²	Transistor Density 51.56 MTr/mm²

Images