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ATI Mobility Radeon HD 4870 1 GB

Graphics Processor
M98
Cores
800
TMUs
40
ROPs
16
Memory Size
1024 MB
Memory Type
GDDR5
Bus Width
256 bit
Front GPU Chip
GPU Chip
GPU

Graphics Processor

GPU Name
M98
GPU Variant
M98 XT L2
(216-0732023)
Architecture
TeraScale
Foundry
TSMC
Process Size
55 nm
Transistors
956 million
Density
3.7M / mm²
Die Size
256 mm²
Chip Package
HFCBGA-1492

Mobile Graphics

Release Date
Jan 9th, 2009
Generation
M9x
(Mobility HD 4800)
Predecessor
M8x
Successor
Manhattan
Production
End-of-life
Bus Interface
PCIe 2.0 x16

Clock Speeds

GPU Clock
550 MHz
Memory Clock
888 MHz
700 MHz (-21%)
1776 Mbps effective
2.8 Gbps effective

Memory

Memory Size
512 MB
1024 MB
Memory Type
GDDR3
GDDR5
Memory Bus
256 bit
Bandwidth
56.83 GB/s
89.60 GB/s

Render Config

Shading Units
800
TMUs
40
ROPs
16
Compute Units
10
L1 Cache
16 KB (per CU)
L2 Cache
256 KB

Theoretical Performance

Pixel Rate
8.800 GPixel/s
Texture Rate
22.00 GTexel/s
FP32 (float)
880.0 GFLOPS
FP64 (double)
176.0 GFLOPS (1:5)

Board Design

Slot Width
MXM Module
TDP
unknown
Outputs
Portable Device Dependent
Power Connectors
None

Graphics Features

DirectX
10.1 (10_1)
OpenGL
3.3
OpenCL
1.1
Vulkan
N/A
Shader Model
4.1

M98 GPU Notes

Desktop Variant: RV770
Codename: Wekiva
Graphics/Compute: GFX3
Display Core Engine: 3.1
Unified Video Decoder: 2.0

Chip Codes:
216-0732000 - M98 A11
216-0732019 - M98 A12
216-0732004 - M98 XT A11
216-0732023 - M98 XT A12

Other retail boards based on this design (1)

Name GPU Clock Memory Clock Other Changes
ATI Mobility Radeon HD 4870 1 GB
550 MHz 700 MHz 1024 MB, GDDR5
May 11th, 2024 15:45 EDT change timezone

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