Radeon HD 6870 and Radeon RX 6600 XT - video card comparison
Passmark - benchmark score Radeon HD 6870 vs Radeon RX 6600 XT
Radeon HD 6870
2285
Radeon RX 6600 XT
16985
Radeon HD 6870
Radeon RX 6600 XT
Architecture
Terascale 2 (2009−2015)
Navi / RDNA2 (2020−2022)
GPU code name
RV940 Barts
Navi 23
Market segment
Desktop
Desktop
Release date
October 2010
July 2021
Bus support
PCIe 2.0 x16
-
Interface
PCIe 2.0 x16
PCIe 4.0 x8
Supplementary power connectors
2x 6-pin
1x 8-pin
Boost clock speed
900 MHz
2589 MHz
Core clock speed
-
1968 MHz
Floating-point performance
2,016.0 gflops
-
Manufacturing process technology
40 nm
7 nm
Number of transistors
1,700 million
11,060 million
Pipelines / CUDA cores
1120
2048
Power consumption (TDP)
151 Watt
160 (TGP) Watt
Texture fill rate
50.40
331.4
Memory type
GDDR5
GDDR6
Maximum RAM amount
1 GB
8 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
1050 MHz
16000 MHz
Memory bandwidth
134.4 GB/s
256.0 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
1x HDMI, 2x DisplayPort
Eyefinity
1
-
HDMI
+
+
DisplayPort support
-
-
DirectX
DirectX® 11
12.0 Ultimate (12_2)
Mantle
-
-
OpenCL
1.2
2.1
OpenGL
4.4
4.6
Shader Model
5.0
6.5
Vulkan
-
1.2
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-