AMD Radeon RX 7990 XTX vs AMD Radeon HD 8870 OEM

VS

AMD Radeon RX 7990 XTX AMD Radeon HD 8870 OEM

We compared two Desktop platform GPUs: 24GB VRAM Radeon RX 7990 XTX 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 7990 XTX 's Advantages

Boost Clock3599MHz

More VRAM (24GB vs 2GB)

Larger VRAM bandwidth (1152GB/s vs 153.6GB/s)

4864 additional rendering cores

AMD Radeon HD 8870 OEM 's Advantages

Lower TDP (175W vs 405W)

Score

Benchmark

FP32 (float)

Radeon RX 7990 XTX +3355%

88.45 TFLOPS

Radeon HD 8870 OEM

2.56 TFLOPS

Radeon RX 7990 XTX

VS

Radeon HD 8870 OEM

Graphics Card

Unknown

Release Date

Jan 2013

Navi III

Generation

Sea Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

2500 MHz

Base Clock

-

3599 MHz

Boost Clock

-

3000 MHz

Memory Clock

1200 MHz

Memory

24GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

384bit

Memory Bus

256bit

1152GB/s

Bandwidth

153.6GB/s

Render Config

-

SM Count

-

96

Compute Units

20

6144

Shading Units

1280

384

TMUs

80

192

ROPs

32

-

Tensor Cores

-

96

RT Cores

-

256 KB per Array

L1 Cache

16 KB (per CU)

6 MB

L2 Cache

512 KB

Theoretical Performance

691.0 GPixel/s

Pixel Rate

32.00 GPixel/s

1382 GTexel/s

Texture Rate

80.00 GTexel/s

176.9 TFLOPS

FP16 (half)

-

88.45 TFLOPS

FP32 (float)

2.560 TFLOPS

2.764 TFLOPS

FP64 (double)

160.0 GFLOPS

Graphics Processor

Navi 31

GPU Name

Pitcairn

Navi 31 XTX+

GPU Variant

Pitcairn XT (215-0828047)

RDNA 3.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

5 nm

Process Size

28 nm

57.7 billion

Transistors

2.8 billion

529 mm²

Die Size

212 mm²

Board Design

405W

TDP

175W

800 W

Suggested PSU

450 W

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

Outputs

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

3x 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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