AMD Radeon HD 8870 OEM vs AMD Radeon RX 7900 XT

VS

AMD Radeon HD 8870 OEM

AMD Radeon RX 7900 XT

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 8870 OEM and 20GB VRAM Radeon RX 7900 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8870 OEM 's Advantages

Lower TDP (175W vs 300W)

AMD Radeon RX 7900 XT 's Advantages

Released 9 years and 10 months late

Boost Clock2394MHz

More VRAM (20GB vs 2GB)

Larger VRAM bandwidth (800.0GB/s vs 153.6GB/s)

4096 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 8870 OEM

2.56 TFLOPS

Radeon RX 7900 XT +1910%

51.48 TFLOPS

Radeon HD 8870 OEM

VS

Radeon RX 7900 XT

Graphics Card

Jan 2013

Release Date

Nov 2022

Sea Islands

Generation

Navi III

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

1387 MHz

-

Boost Clock

2394 MHz

1200 MHz

Memory Clock

2500 MHz

Memory

2GB

Memory Size

20GB

GDDR5

Memory Type

GDDR6

256bit

Memory Bus

320bit

153.6GB/s

Bandwidth

800.0GB/s

Render Config

20

Compute Units

84

-

1280

Shading Units

5376

80

TMUs

336

32

ROPs

192

-

RT Cores

84

16 KB (per CU)

L1 Cache

256 KB per Array

512 KB

L2 Cache

6 MB

-

L3 Cache

80 MB

Theoretical Performance

32.00 GPixel/s

Pixel Rate

459.6 GPixel/s

80.00 GTexel/s

Texture Rate

804.4 GTexel/s

-

FP16 (half)

103.0 TFLOPS

2.560 TFLOPS

FP32 (float)

51.48 TFLOPS

160.0 GFLOPS

FP64 (double)

1.609 TFLOPS

Board Design

175W

TDP

300W

450 W

Suggested PSU

700 W

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

Outputs

1x HDMI 2.1a 2x DisplayPort 2.1 1x USB Type-C

2x 6-pin

Power Connectors

2x 8-pin

Graphics Processor

Pitcairn

GPU Name

Navi 31

Pitcairn XT (215-0828047)

GPU Variant

Navi 31 XT (215-145000156)

GCN 1.0

Architecture

RDNA 3.0

TSMC

Foundry

TSMC

28 nm

Process Size

5 nm

2.8 billion

Transistors

57.7 billion

212 mm²

Die Size

529 mm²

Graphics Features

12 (11_1)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

1.2

OpenCL

2.2

1.2

Vulkan

1.3

-

5.1

Shader Model

6.7

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