AMD Radeon RX 6600 XT vs AMD Radeon HD 8770 OEM

VS

AMD Radeon RX 6600 XT

AMD Radeon HD 8770 OEM

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 XT and 1024MB VRAM Radeon HD 8770 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600 XT 's Advantages

Released 7 years and 10 months late

Boost Clock2589MHz

More VRAM (8GB vs 1024GB)

Larger VRAM bandwidth (256.0GB/s vs 96.00GB/s)

1152 additional rendering cores

AMD Radeon HD 8770 OEM 's Advantages

Lower TDP (85W vs 160W)

Score

Benchmark

FP32 (float)

Radeon RX 6600 XT +463%

10.6 TFLOPS

Radeon HD 8770 OEM

1.882 TFLOPS

Radeon RX 6600 XT

VS

Radeon HD 8770 OEM

Graphics Card

Jul 2021

Release Date

Sep 2013

Navi II

Generation

Sea Islands

Desktop

Type

Desktop

PCIe 4.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1968 MHz

Base Clock

-

2589 MHz

Boost Clock

-

2000 MHz

Memory Clock

1500 MHz

Memory

8GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

128bit

Memory Bus

128bit

256.0GB/s

Bandwidth

96.00GB/s

Render Config

32

Compute Units

14

-

2048

Shading Units

896

128

TMUs

56

64

ROPs

16

-

32

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

2 MB

L2 Cache

256 KB

32 MB

L3 Cache

-

Theoretical Performance

165.7 GPixel/s

Pixel Rate

16.80 GPixel/s

331.4 GTexel/s

Texture Rate

58.80 GTexel/s

21.21 TFLOPS

FP16 (half)

-

10.60 TFLOPS

FP32 (float)

1.882 TFLOPS

662.8 GFLOPS

FP64 (double)

117.6 GFLOPS

Board Design

160W

TDP

85W

450 W

Suggested PSU

250 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

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

1x 8-pin

Power Connectors

1x 6-pin

Graphics Processor

Navi 23

GPU Name

Bonaire

Navi 23 XT (215-130000006)

GPU Variant

Bonaire XT (215-0839039)

RDNA 2.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

11.06 billion

Transistors

2.08 billion

237 mm²

Die Size

160 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.1

OpenCL

2.0

1.3

Vulkan

1.2

-

6.7

Shader Model

6.3

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