AMD Radeon RX 6800 3456SP vs AMD Radeon HD 8870 OEM
GPU · Specs Compare
Graphics Card
Release Date
Unknown
Jan 2013
Generation
Navi II
Sea Islands
Type
Desktop
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
1700 MHz
—
Boost Clock
2250 MHz
—
Memory Clock
2000 MHz
1200 MHz
Memory
Memory Size
16GB
2GB
Memory Type
GDDR6
GDDR5
Memory Bus
256bit
256bit
Bandwidth
512.0GB/s
153.6GB/s
Render Config
Compute Units
54
20
Shading Units
3456
1280
TMUs
216
80
ROPs
96
32
RT Cores
54
—
L1 Cache
128 KB per Array
16 KB (per CU)
L2 Cache
4 MB
512 KB
L3 Cache
128 MB
—
Theoretical Performance
Pixel Rate
216.0 GPixel/s
32.00 GPixel/s
Texture Rate
486.0 GTexel/s
80.00 GTexel/s
FP16 (half)
31.10 TFLOPS
—
FP32 (float)
15.55 TFLOPS
2.560 TFLOPS
FP64 (double)
972.0 GFLOPS
160.0 GFLOPS
Graphics Processor
GPU Name
Navi 21
Pitcairn
GPU Variant
Navi 21 ES(215-121000066)
Pitcairn XT(215-0828047)
Architecture
RDNA 2.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
7 nm
28 nm
Transistors
26.8 billion
2.8 billion
Die Size
520 mm²
212 mm²
Board Design
TDP
250W
175W
Suggested PSU
600 W
450 W
Outputs
1x HDMI 2.12x DisplayPort 1.4a1x USB Type-C
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
2x 8-pin
2x 6-pin
Graphics Features
DirectX
12 Ultimate (12_2)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
2.1
1.2
Vulkan
1.3
1.2
Shader Model
6.8
5.1
▲ Specs Compare
Data sourced from official specifications and benchmark tests.