AMD Radeon HD 8870 vs AMD Radeon RX 7400 Full Specs

Summary

1,280 Shaders 1GHz	1,792 Shaders 1.1GHz
2GB GDDR5153.6GB/s	8GB GDDR6172.8GB/s
Peak·FP32·FP16 2.56 TFLOPS	Peak·FP32·FP16 7.88 TFLOPS
Form Factor PCIe Card	Form Factor PCIe Card
TDP 150W	TDP 55W
Power Connectors - 2x 6-Pin	Power Connectors 1x 8-Pin -

Highlights

Peak OPS

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

Radeon HD 88702.56 TFLOPSFP32

x1

Radeon RX 740031.54 TOPSINT4 Tensor

x12.32

Show Top Score

Theoretical Performance

Clock Speed1000MHz UC·Boost·OC	Clock Speed1100MHz UC·Base·Boost·OC
Peak OPS 2.56 TFLOPSFP32	Peak OPS 31.54 TOPSINT4 Tensor
-	Tensor FP16-16 7.88 TFLOPS Tensor FP16-32 7.88 TFLOPS
-	BF16 15.77 TFLOPS Tensor BF16 7.88 TFLOPS
FP32 2.56 TFLOPS	FP32 7.88 TFLOPS
FP64 160 GFLOPS	FP64 246.4 GFLOPS
Tensor INT4 -	Tensor INT4 31.54 TOPS
-	Tensor INT8 7.88 TOPS
Pixel Rate 32 GPixel/s	Pixel Rate 70.4 GPixel/s
Texture Rate 80 GTexel/s	Texture Rate 123.2 GTexel/s

Core Config

Shaders 1,280 Shaders	Shaders 1,792 Shaders
TMUs 80 TMUs	TMUs 112 TMUs
ROPs 32 ROPs	ROPs 64 ROPs
Tensor Cores -	Tensor Cores 56 T-Cores
RT Cores -	RT Cores 28 RT-Cores
CUs 20 CUs	CUs 28 CUs

Clocks

Base Clock -	Base Clock 1GHz
Boost Clock 1GHz	Boost Clock 1.1GHz

Cache

L2 Cache 512KB shared	L2 Cache 2MB shared
L3 Cache -	L3 Cache 32MB shared
L3 Bandwidth -	L3 Bandwidth 1.16TB/s

Memory

2GB GDDR5	8GB GDDR6
Memory Bus 256-bit	Memory Bus 128-bit
Memory Speed 4.8GT/s	Memory Speed 10.8GT/s
Memory Bandwidth 153.6GB/s	Memory Bandwidth 172.8GB/s

Power & Thermals

TDP 150W

TDP 55W

Video Output

Multi-Monitor 3	Multi-Monitor 3
HDCP -	HDCP HDCP 2.3

Ports

-	3x DisplayPort 2.1
2x Mini DisplayPort 1.2	-
-	1x HDMI 2.1
1x HDMI 1.4	-
1x DVI-I Dual-Link	-

Encoder

Encoder Model VCE 1.0

Encoder Model VCN 4.0

Decoder

Decoder Model UVD 4.0

Decoder Model VCN 4.0

Card

Form Factor PCIe Card	Form Factor PCIe Card
PCIe 2-Slots	PCIe 2-Slots
Height 111 mm (4.37") Width 241 mm (9.49") Depth 37 mm (1.46")	Height 115 mm (4.53") Width 204 mm (8.03") Depth 40 mm (1.57")
Cooling Blower 1x Fan	Cooling Open-Air 2x Fans
Power Connectors 2x 6-Pin	Power Connectors 1x 8-Pin

Chip

Manufacturer AMD	Manufacturer AMD
Chip Designer AMD	Chip Designer AMD
Architecture GCN 1	Architecture RDNA 3
Family Radeon HD 8000	Family Radeon RX 7000
Branding	Branding
Codename Pitcairn	Codename Hotpink Bonefish
Chip Variant Pitcairn Pro	Chip Variant Navi 33 XL
Market Segment Desktop	Market Segment Desktop
Release Date Jan 8, 2013	Release Date Aug 8, 2025

Fabrication

Foundry TSMC	Foundry TSMC
Fabrication Node 28nm	Fabrication Node N6
Die Size 212mm²	Die Size 204mm²
Transistor Count 2.8 Billion	Transistor Count 13.3 Billion
Transistor Density 13.21 MTr/mm²	Transistor Density 65.2 MTr/mm²

Images

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