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GPU Comparison
AMD Radeon RX 6900 XT vs ATI Radeon HD 3870 Mac Edition
AMD Radeon RX 6900 XT vs ATI Radeon HD 3870 Mac Edition
VS
AMD Radeon RX 6900 XT
ATI Radeon HD 3870 Mac Edition
We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XT and 512MB VRAM Radeon HD 3870 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon RX 6900 XT 's Advantages
Released 12 years and 4 months late
Boost Clock2250MHz
Larger VRAM bandwidth (512.0GB/s vs 72.06GB/s)
4800 additional rendering cores
ATI Radeon HD 3870 Mac Edition 's Advantages
Lower TDP (106W vs 300W)
Score
Benchmark
FP32 (float)
Radeon RX 6900 XT
+4535%
23.04 TFLOPS
Radeon HD 3870 Mac Edition
0.497 TFLOPS
Radeon RX 6900 XT
VS
Radeon HD 3870 Mac Edition
Graphics Card
Oct 2020
Release Date
Jun 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
1126 MHz
Memory
16GB
Memory Size
512MB
GDDR6
Memory Type
GDDR4
256bit
Memory Bus
256bit
512.0GB/s
Bandwidth
72.06GB/s
Render Config
-
SM Count
-
80
Compute Units
4
5120
Shading Units
320
320
TMUs
16
128
ROPs
16
-
Tensor Cores
-
80
RT Cores
-
128 KB per Array
L1 Cache
-
4 MB
L2 Cache
256 KB
Theoretical Performance
288.0 GPixel/s
Pixel Rate
12.43 GPixel/s
720.0 GTexel/s
Texture Rate
12.43 GTexel/s
46.08 TFLOPS
FP16 (half)
-
23.04 TFLOPS
FP32 (float)
497.3 GFLOPS
1440 GFLOPS
FP64 (double)
99.46 GFLOPS
Graphics Processor
Navi 21
GPU Name
RV670
Navi 21 XTX (215-121000167)
GPU Variant
RV670 XT (215-0708005)
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
106W
700 W
Suggested PSU
300 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
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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