Home GPU Comparison ATI Radeon HD 3870 Mac Edition vs AMD Radeon RX 6800 XT

ATI Radeon HD 3870 Mac Edition vs AMD Radeon RX 6800 XT

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3870 Mac Edition and 16GB VRAM Radeon RX 6800 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 3870 Mac Edition 's Advantages
Lower TDP (106W vs 300W)
AMD Radeon RX 6800 XT 's Advantages
Released 12 years and 4 months late
Boost Clock2250MHz
More VRAM (16GB vs 512GB)
Larger VRAM bandwidth (512.0GB/s vs 72.06GB/s)
4288 additional rendering cores

Score

Benchmark

FP32 (float)
Radeon HD 3870 Mac Edition
0.497 TFLOPS
Radeon RX 6800 XT +4073%
20.74 TFLOPS
VS

Graphics Card

Jun 2008
Release Date
Oct 2020
Radeon R600
Generation
Navi II
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 4.0 x16

Clock Speeds

-
Base Clock
1825 MHz
-
Boost Clock
2250 MHz
1126 MHz
Memory Clock
2000 MHz

Memory

512MB
Memory Size
16GB
GDDR4
Memory Type
GDDR6
256bit
Memory Bus
256bit
72.06GB/s
Bandwidth
512.0GB/s

Render Config

4
Compute Units
72
-
-
-
320
Shading Units
4608
16
TMUs
288
16
ROPs
128
-
-
-
-
RT Cores
72
-
L1 Cache
128 KB per Array
256 KB
L2 Cache
4 MB
-
L3 Cache
128 MB

Theoretical Performance

12.43 GPixel/s
Pixel Rate
288.0 GPixel/s
12.43 GTexel/s
Texture Rate
648.0 GTexel/s
-
FP16 (half)
41.47 TFLOPS
497.3 GFLOPS
FP32 (float)
20.74 TFLOPS
99.46 GFLOPS
FP64 (double)
1296 GFLOPS

Board Design

106W
TDP
300W
300 W
Suggested PSU
700 W
2x DVI 1x S-Video
Outputs
1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C
1x 6-pin
Power Connectors
2x 8-pin

Graphics Processor

RV670
GPU Name
Navi 21
RV670 XT (215-0708005)
GPU Variant
Navi 21 XT (215-121000177)
TeraScale
Architecture
RDNA 2.0
TSMC
Foundry
TSMC
55 nm
Process Size
7 nm
0.666 billion
Transistors
26.8 billion
192 mm²
Die Size
520 mm²

Graphics Features

10.1 (10_1)
DirectX
12 Ultimate (12_2)
3.3 (full) 4.0 (partial)
OpenGL
4.6
N/A
OpenCL
2.1
N/A
Vulkan
1.3
-
-
-
4.1
Shader Model
6.5

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