GPU Comparison

A

AMD

RADEON

AMD Radeon RX 6800 XT

CORE STATE Navi 21

VRAM 16 GB

CLOCK SPEED 2250 MHz

TDP 300 W

BUS WIDTH 256 bit

ARCHITECTURE RDNA 2.0

nm

PROCESS 7 nm

LAUNCH DATE 2020

VS

NVIDIA

GEFORCE

GeForce GTX 660

CORE STATE GK106

VRAM 2 GB

CLOCK SPEED 1032 MHz

TDP 140 W

BUS WIDTH 192 bit

ARCHITECTURE Kepler

nm

PROCESS 28 nm

LAUNCH DATE 2012

PERFORMANCE BENCHMARKS

3dmark_3dmark_steel_nomad_dx12

3,689

N/A

geekbench_metal

199,366

4,284

geekbench_opencl

154,506

11,347

geekbench_vulkan

152,200

11,368

passmark_directx_10

155

N/A

passmark_directx_11

264

N/A

passmark_directx_12

100

N/A

passmark_directx_9

265

N/A

passmark_g2d

1,030

N/A

passmark_g3d

24,980

N/A

passmark_gpu_compute

13,245

N/A

DETAILED SPECIFICATIONS

SPECIFICATION

RX 6800 XT

GTX 660

Core Specs

Shading Units

4,608

960 -79.2%

Shaders

4,608

960 -79.2%

TMUs

288

80 -72.2%

ROPs

128

24 -81.3%

Compute Units

72

—

Clocks

Base Clock

1825 MHz

980 MHz

Boost Clock

2250 MHz

1032 MHz

Game Clock

2015 MHz

—

Memory Clock

2000 MHz 16 Gbps effective

1502 MHz 6 Gbps effective

Memory

Memory Size

16 GB

2 GB

VRAM (MB)

16,384

2,048 -87.5%

Memory Type

GDDR6

GDDR5

Memory Bus

256 bit

192 bit

Bandwidth

512.0 GB/s

144.2 GB/s

Cache

L1 Cache

128 KB per Array

16 KB (per SMX)

L2 Cache

4 MB

384 KB

L3 Cache

128 MB

—

L0 Cache

32 KB per WGP

—

Performance

Pixel Rate

288.0 GPixel/s

20.64 GPixel/s

Texture Rate

648.0 GTexel/s

82.56 GTexel/s

FP32 (TFLOPS)

20.74 TFLOPS

1.981 TFLOPS

FP64 (TFLOPS)

1,296.0 GFLOPS (1:16)

82.56 GFLOPS (1:24)

FP16 (TFLOPS)

41.47 TFLOPS (2:1)

—

AI/RT

RT Cores

72

—

Power

TDP

300 W

140 W

TDP (W)

300

140 -53.3%

Suggested PSU

700 W

300 W

Power Connectors

2x 8-pin

1x 6-pin

Architecture

Architecture

RDNA 2.0

Kepler

GPU Name

Navi 21

GK106

Generation

Navi II (RX 6000)

GeForce 600

Process Size

7 nm

28 nm

Transistors

26,800 million

2,540 million

Die Size

520 mm²

221 mm²

Foundry

TSMC

TSMC

Density

51.5M / mm²

11.5M / mm²

API Support

DirectX

12 Ultimate (12_2)

12 (11_0)

OpenGL

4.6

4.6

Vulkan

1.4

1.2.175

OpenCL

2.1

3.0

CUDA

—

3.0

Shader Model

6.8

6.5 (5.1)

Physical

Slot Width

Dual-slot

Dual-slot

Length

267 mm 10.5 inches

241 mm 9.5 inches

Height

120 mm 4.7 inches

—

Outputs

1x HDMI 2.12x DisplayPort 1.4a1x USB Type-C

2x DVI1x HDMI 1.4a1x DisplayPort 1.2

Bus Interface

PCIe 4.0 x16

PCIe 3.0 x16

Other

Launch Price

649 USD

229 USD

Production

End-of-life

End-of-life

Predecessor

Navi

GeForce 500

Successor

Navi III

GeForce 700

View Radeon RX 6800 XT Details View GeForce GTX 660 Details