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GPU Comparison
AMD Radeon HD 6870 vs AMD Radeon RX 6800
AMD Radeon HD 6870 vs AMD Radeon RX 6800
VS
AMD Radeon HD 6870
AMD Radeon RX 6800
We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 and 16GB VRAM Radeon RX 6800 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 6870 's Advantages
Lower TDP (151W vs 250W)
AMD Radeon RX 6800 's Advantages
Released 10 years late
Boost Clock2105MHz
More VRAM (16GB vs 1GB)
Larger VRAM bandwidth (512.0GB/s vs 134.4GB/s)
2720 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 6870
2.016 TFLOPS
Radeon RX 6800
+702%
16.17 TFLOPS
Radeon HD 6870
VS
Radeon RX 6800
Graphics Card
Oct 2010
Release Date
Oct 2020
Northern Islands
Generation
Navi II
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 4.0 x16
Clock Speeds
-
Base Clock
1700 MHz
-
Boost Clock
2105 MHz
1050 MHz
Memory Clock
2000 MHz
Memory
1024MB
Memory Size
16GB
GDDR5
Memory Type
GDDR6
256bit
Memory Bus
256bit
134.4GB/s
Bandwidth
512.0GB/s
Render Config
-
SM Count
-
14
Compute Units
60
1120
Shading Units
3840
56
TMUs
240
32
ROPs
96
-
Tensor Cores
-
-
RT Cores
60
8 KB (per CU)
L1 Cache
128 KB per Array
512 KB
L2 Cache
4 MB
Theoretical Performance
28.80 GPixel/s
Pixel Rate
202.1 GPixel/s
50.40 GTexel/s
Texture Rate
505.2 GTexel/s
-
FP16 (half)
32.33 TFLOPS
2.016 TFLOPS
FP32 (float)
16.17 TFLOPS
-
FP64 (double)
1010 GFLOPS
Graphics Processor
Barts
GPU Name
Navi 21
Barts XT (215-0798000)
GPU Variant
Navi 21 XL (215-121000187)
TeraScale 2
Architecture
RDNA 2.0
TSMC
Foundry
TSMC
40 nm
Process Size
7 nm
1.7 billion
Transistors
26.8 billion
255 mm²
Die Size
520 mm²
Board Design
151W
TDP
250W
450 W
Suggested PSU
600 W
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
Outputs
1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C
2x 6-pin
Power Connectors
2x 8-pin
Graphics Features
11.2 (11_0)
DirectX
12 Ultimate (12_2)
4.4
OpenGL
4.6
1.2
OpenCL
2.1
N/A
Vulkan
1.3
-
CUDA
-
5.0
Shader Model
6.5
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