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GPU Comparison
AMD Radeon RX 6800 XT vs ATI Radeon HD 3870 X2
AMD Radeon RX 6800 XT vs ATI Radeon HD 3870 X2
VS
AMD Radeon RX 6800 XT
ATI Radeon HD 3870 X2
We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6800 XT and 512MB VRAM Radeon HD 3870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon RX 6800 XT 's Advantages
Released 12 years and 9 months late
Boost Clock2250MHz
Larger VRAM bandwidth (512.0GB/s vs 57.66GB/s)
4288 additional rendering cores
ATI Radeon HD 3870 X2 's Advantages
Lower TDP (165W vs 300W)
Score
Benchmark
FP32 (float)
Radeon RX 6800 XT
+3828%
20.74 TFLOPS
Radeon HD 3870 X2
0.528 TFLOPS
Radeon RX 6800 XT
VS
Radeon HD 3870 X2
Graphics Card
Oct 2020
Release Date
Jan 2008
Navi II
Generation
Radeon R600
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
1825 MHz
Base Clock
-
2250 MHz
Boost Clock
-
2000 MHz
Memory Clock
901 MHz
Memory
16GB
Memory Size
512MB
GDDR6
Memory Type
GDDR3
256bit
Memory Bus
256bit
512.0GB/s
Bandwidth
57.66GB/s
Render Config
-
SM Count
-
72
Compute Units
4
4608
Shading Units
320
288
TMUs
16
128
ROPs
16
-
Tensor Cores
-
72
RT Cores
-
128 KB per Array
L1 Cache
-
4 MB
L2 Cache
256 KB
Theoretical Performance
288.0 GPixel/s
Pixel Rate
13.20 GPixel/s
648.0 GTexel/s
Texture Rate
13.20 GTexel/s
41.47 TFLOPS
FP16 (half)
-
20.74 TFLOPS
FP32 (float)
528.0 GFLOPS
1296 GFLOPS
FP64 (double)
105.6 GFLOPS
Graphics Processor
Navi 21
GPU Name
R680
Navi 21 XT (215-121000177)
GPU Variant
R680 XT (215-0708017)
RDNA 2.0
Architecture
TeraScale
TSMC
Foundry
TSMC
7 nm
Process Size
55 nm
26.8 billion
Transistors
0.666 billion
520 mm²
Die Size
192 mm²
Board Design
300W
TDP
165W
700 W
Suggested PSU
450 W
1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C
Outputs
2x DVI 1x S-Video
2x 8-pin
Power Connectors
1x 6-pin + 1x 8-pin
Graphics Features
12 Ultimate (12_2)
DirectX
10.1 (10_1)
4.6
OpenGL
3.3 (full) 4.0 (partial)
2.1
OpenCL
N/A
1.3
Vulkan
N/A
-
CUDA
-
6.5
Shader Model
4.1
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