Radeon HD 3870 X2 and Radeon RX 6600 XT - video card comparison
Passmark - benchmark score Radeon HD 3870 X2 vs Radeon RX 6600 XT
Radeon HD 3870 X2
729
Radeon RX 6600 XT
16985
Radeon HD 3870 X2
Radeon RX 6600 XT
Architecture
TeraScale (2005−2013)
Navi / RDNA2 (2020−2022)
GPU code name
R680
Navi 23
Market segment
Desktop
Desktop
Release date
January 2008
July 2021
Interface
PCIe 2.0 x16
PCIe 4.0 x8
Supplementary power connectors
1x 6-pin + 1x 8-pin
1x 8-pin
Boost clock speed
-
2589 MHz
Core clock speed
825 MHz
1968 MHz
Floating-point performance
2x 528.0 gflops
-
Manufacturing process technology
55 nm
7 nm
Number of transistors
666 million
11,060 million
Pipelines / CUDA cores
320
2048
Power consumption (TDP)
165 Watt
160 (TGP) Watt
Texture fill rate
13.20
331.4
Memory type
GDDR3
GDDR6
Maximum RAM amount
512 MB
8 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
1802 MHz
16000 MHz
Memory bandwidth
57.66 GB/s
256.0 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x S-Video
1x HDMI, 2x DisplayPort
HDMI
-
+
DirectX
10.1 (10_1)
12.0 Ultimate (12_2)
OpenCL
N/A
2.1
OpenGL
3.3
4.6
Shader Model
4.1
6.5
Vulkan
N/A
1.2