Radeon R9 390X and Radeon RX 6600 XT - video card comparison
Passmark - benchmark score Radeon R9 390X vs Radeon RX 6600 XT
Radeon R9 390X
9722
Radeon RX 6600 XT
16985
Radeon R9 390X
Radeon RX 6600 XT
Architecture
GCN (2011−2017)
Navi / RDNA2 (2020−2022)
GPU code name
Grenada XT
Navi 23
Market segment
Desktop
Desktop
Release date
June 2015
July 2021
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 4.0 x8
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
1x 8-pin
Bridgeless CrossFire
1
-
Boost clock speed
1050 MHz
2589 MHz
Core clock speed
-
1968 MHz
Floating-point performance
5,914 gflops
-
Manufacturing process technology
28 nm
7 nm
Number of transistors
6,200 million
11,060 million
Pipelines / CUDA cores
2816
2048
Power consumption (TDP)
275 Watt
160 (TGP) Watt
Texture fill rate
184.8
331.4
Memory type
GDDR5
GDDR6
Maximum RAM amount
0 MB
8 GB
Memory bus width
512 Bit
128 Bit
Memory clock speed
1050 MHz
16000 MHz
Memory bandwidth
384 GB/s
256.0 GB/s
High bandwidth memory (HBM)
-
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x HDMI, 2x DisplayPort
Eyefinity
+
-
Number of Eyefinity displays
6
-
HDMI
+
+
DisplayPort support
+
-
DirectX
DirectX® 12
12.0 Ultimate (12_2)
Mantle
+
-
OpenCL
2.0
2.1
OpenGL
4.6
4.6
Shader Model
6.3
6.5
Vulkan
+
1.2
AppAcceleration
-
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
+
-
TrueAudio
+
-
VCE
+
-
ZeroCore
-
-