Radeon RX 6600 XT vs Radeon HD 7870 GHz Edition
We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 XT and 2GB VRAM Radeon HD 7870 GHz Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6600 XT 's Advantages
Released 9 years and 4 months late
Boost Clock2589MHz
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (256.0GB/s vs 153.6GB/s)
768 additional rendering cores
Lower TDP (160W vs 175W)
Score
Benchmark
FP32 (float)
Radeon RX 6600 XT
+314%
10600
Radeon HD 7870 GHz Edition
2560
Graphics Card
Jul 2021
Release Date
Mar 2012
Navi II
Generation
Southern 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
1200 MHz
Memory
8GB
Memory Size
2GB
GDDR6
Memory Type
GDDR5
128bit
Memory Bus
256bit
256.0GB/s
Bandwidth
153.6GB/s
Render Config
32
Compute Units
20
2048
Shading Units
1280
128
TMUs
80
64
ROPs
32
32
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per CU)
2 MB
L2 Cache
512 KB
32 MB
L3 Cache
-
Theoretical Performance
165.7 GPixel/s
Pixel Rate
32.00 GPixel/s
331.4 GTexel/s
Texture Rate
80.00 GTexel/s
21.21 TFLOPS
FP16 (half)
-
10.60 TFLOPS
FP32 (float)
2.560 TFLOPS
662.8 GFLOPS
FP64 (double)
160.0 GFLOPS
Board Design
160W
TDP
175W
450 W
Suggested PSU
450 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
2x 6-pin
Graphics Processor
Navi 23
GPU Name
Pitcairn
Navi 23 XT
(215-130000006)
GPU Variant
Pitcairn XT
(215-0828047)
RDNA 2.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
7 nm
Process Size
28 nm
11.06 billion
Transistors
2.8 billion
237 mm²
Die Size
212 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_1)
4.6
OpenGL
4.6
2.1
OpenCL
1.2
1.3
Vulkan
1.2
6.7
Shader Model
5.1
