AMD Radeon RX 7800 XT vs AMD Radeon HD 8870 OEM

VS

AMD Radeon RX 7800 XT AMD Radeon HD 8870 OEM

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 7800 XT and 2GB VRAM Radeon HD 8870 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7800 XT 's Advantages

Released 10 years and 7 months late

Boost Clock2430MHz

More VRAM (16GB vs 2GB)

Larger VRAM bandwidth (624.1GB/s vs 153.6GB/s)

2560 additional rendering cores

AMD Radeon HD 8870 OEM 's Advantages

Lower TDP (175W vs 263W)

Score

Benchmark

FP32 (float)

Radeon RX 7800 XT +1357%

37.32 TFLOPS

Radeon HD 8870 OEM

2.56 TFLOPS

Radeon RX 7800 XT

VS

Radeon HD 8870 OEM

Graphics Card

Aug 2023

Release Date

Jan 2013

Navi III

Generation

Sea Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1295 MHz

Base Clock

-

2430 MHz

Boost Clock

-

2438 MHz

Memory Clock

1200 MHz

Memory

16GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

256bit

624.1GB/s

Bandwidth

153.6GB/s

Render Config

-

SM Count

-

60

Compute Units

20

3840

Shading Units

1280

240

TMUs

80

96

ROPs

32

-

Tensor Cores

-

60

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

4 MB

L2 Cache

512 KB

Theoretical Performance

233.3 GPixel/s

Pixel Rate

32.00 GPixel/s

583.2 GTexel/s

Texture Rate

80.00 GTexel/s

74.65 TFLOPS

FP16 (half)

-

37.32 TFLOPS

FP32 (float)

2.560 TFLOPS

1166 GFLOPS

FP64 (double)

160.0 GFLOPS

Graphics Processor

Navi 32

GPU Name

Pitcairn

Navi 32 XT (215-180000006)

GPU Variant

Pitcairn XT (215-0828047)

RDNA 3.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

5 nm

Process Size

28 nm

28.1 billion

Transistors

2.8 billion

346 mm²

Die Size

212 mm²

Board Design

263W

TDP

175W

600 W

Suggested PSU

450 W

1x HDMI 2.1a 3x DisplayPort 2.1

Outputs

1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

2x 8-pin

Power Connectors

2x 6-pin

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.2

OpenCL

1.2

1.3

Vulkan

1.2

-

CUDA

-

6.7

Shader Model

5.1

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