AMD Radeon RX 7900 GRE vs AMD Radeon HD 6870 X2

VS

AMD Radeon RX 7900 GRE

AMD Radeon HD 6870 X2

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 7900 GRE and 1024MB VRAM Radeon HD 6870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7900 GRE 's Advantages

Released 12 years late

Boost Clock2245MHz

More VRAM (16GB vs 1024GB)

Larger VRAM bandwidth (576.0GB/s vs 134.4GB/s)

4000 additional rendering cores

Lower TDP (260W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 GRE +2180%

45.98 TFLOPS

Radeon HD 6870 X2

2.016 TFLOPS

Radeon RX 7900 GRE

VS

Radeon HD 6870 X2

Graphics Card

Jul 2023

Release Date

Jul 2011

Navi III

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1287 MHz

Base Clock

-

2245 MHz

Boost Clock

-

2250 MHz

Memory Clock

1050 MHz

Memory

16GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

256bit

576.0GB/s

Bandwidth

134.4GB/s

Render Config

80

Compute Units

14

-

5120

Shading Units

1120

320

TMUs

56

160

ROPs

32

-

80

RT Cores

-

256 KB per Array

L1 Cache

8 KB (per CU)

6 MB

L2 Cache

512 KB

64 MB

L3 Cache

-

Theoretical Performance

359.2 GPixel/s

Pixel Rate

28.80 GPixel/s

718.4 GTexel/s

Texture Rate

50.40 GTexel/s

91.96 TFLOPS

FP16 (half)

-

45.98 TFLOPS

FP32 (float)

2.016 TFLOPS

1437 GFLOPS

FP64 (double)

-

Board Design

260W

TDP

300W

600 W

Suggested PSU

700 W

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

Outputs

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

2x 8-pin

Power Connectors

-

Graphics Processor

Navi 31

GPU Name

Barts

Navi 31 XL (215-145000206)

GPU Variant

Barts XT (215-0798000)

RDNA 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

5 nm

Process Size

40 nm

57.7 billion

Transistors

1.7 billion

529 mm²

Die Size

255 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.2

OpenCL

1.2

1.3

Vulkan

N/A

-

6.7

Shader Model

5.0

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