AMD Radeon RX 7400 vs ATI Radeon HD 4870 Mac Full Specs

Summary

1,792 Shaders 1.1GHz	800 Shaders 750MHz
8GB GDDR6172.8GB/s	524MB GDDR5108.8GB/s
Peak·FP32·FP16 7.88 TFLOPS	Peak·FP32·FP16 1.2 TFLOPS
Form Factor PCIe Card	Form Factor PCIe Card
TDP 55W	TDP 150W
Power Connectors 1x 8-Pin -	Power Connectors - 2x 6-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 RX 740031.54 TOPSINT4 Tensor

x26.28

Radeon HD 4870 Mac1.2 TFLOPSFP32

x1

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Theoretical Performance

Clock Speed1100MHz UC·Base·Boost·OC	Clock Speed750MHz UC·Boost·OC
Peak OPS 31.54 TOPSINT4 Tensor	Peak OPS 1.2 TFLOPSFP32
Tensor FP16-16 7.88 TFLOPS Tensor FP16-32 7.88 TFLOPS	-
BF16 15.77 TFLOPS Tensor BF16 7.88 TFLOPS	-
FP32 7.88 TFLOPS	FP32 1.2 TFLOPS
FP64 246.4 GFLOPS	FP64 240 GFLOPS
Tensor INT4 31.54 TOPS	Tensor INT4 -
Tensor INT8 7.88 TOPS	-
Pixel Rate 70.4 GPixel/s	Pixel Rate 12 GPixel/s
Texture Rate 123.2 GTexel/s	Texture Rate 30 GTexel/s

Core Config

Shaders 1,792 Shaders	Shaders 800 Shaders
TMUs 112 TMUs	TMUs 40 TMUs
ROPs 64 ROPs	ROPs 16 ROPs
Tensor Cores 56 T-Cores	Tensor Cores -
RT Cores 28 RT-Cores	RT Cores -
CUs 28 CUs	CUs 10 CUs

Clocks

Base Clock 1GHz	Base Clock -
Boost Clock 1.1GHz	Boost Clock 750MHz

Cache

L2 Cache 2MB shared	L2 Cache 256KB shared
L3 Cache 32MB shared	L3 Cache -
L3 Bandwidth 1.16TB/s	L3 Bandwidth -

Memory

8GB GDDR6	524MB GDDR5
Memory Bus 128-bit	Memory Bus 256-bit
Memory Speed 10.8GT/s	Memory Speed 3.4GT/s
Memory Bandwidth 172.8GB/s	Memory Bandwidth 108.8GB/s
ECC No	ECC No

Power & Thermals

TDP 55W

TDP 150W

Video Output

Multi-Monitor 3	Multi-Monitor 2
HDCP HDCP 2.3	HDCP -

Ports

3x DisplayPort 2.1	-
-	1x Mini DisplayPort 1.0
1x HDMI 2.1	-
-	1x DVI-I Dual-Link

Encoder

Encoder Model VCN 4.0

-

Decoder

Decoder Model VCN 4.0

Decoder Model UVD 2.0

Card

Form Factor PCIe Card	Form Factor PCIe Card
PCIe 2-Slots	PCIe 2-Slots
Height 115 mm (4.53") Width 204 mm (8.03") Depth 40 mm (1.57")	Height 110 mm (4.33") Width 250 mm (9.84") Depth 37 mm (1.46")
Cooling Open-Air 2x Fans	Cooling Blower 1x Fan
Power Connectors 1x 8-Pin	Power Connectors 2x 6-Pin

Chip

Manufacturer AMD	Manufacturer ATI
Chip Designer AMD	Chip Designer ATI
Architecture RDNA 3	Architecture TeraScale 1
Family Radeon RX 7000	Family Radeon HD 4000
Branding	Branding
Codename Hotpink Bonefish	Codename Wekiva
Chip Variant Navi 33 XL	Chip Variant RV770 CE
Market Segment Desktop	Market Segment Desktop
Release Date Aug 8, 2025	Release Date Jun 25, 2008

Fabrication

Foundry TSMC	Foundry TSMC
Fabrication Node N6	Fabrication Node 55nm
Die Size 204mm²	Die Size 256mm²
Transistor Count 13.3 Billion	Transistor Count 956 Million
Transistor Density 65.2 MTr/mm²	Transistor Density 3.73 MTr/mm²

Images

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Used In

Desktops -

Desktops Mac Pro(Early 2009)Mac Pro(Dual-Socket, Early 2009)

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