Radeon RX 6800 XT vs Radeon HD 3850
We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6800 XT and 512MB VRAM Radeon HD 3850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6800 XT 's Advantages
Released 12 years and 11 months late
Boost Clock2250MHz
More VRAM (16GB vs 512GB)
Larger VRAM bandwidth (512.0GB/s vs 53.12GB/s)
4288 additional rendering cores
Radeon HD 3850 's Advantages
Lower TDP (75W vs 300W)
Score
Benchmark
FP32 (float)
Radeon RX 6800 XT
+4745%
20740
Radeon HD 3850
428
Graphics Card
Oct 2020
Release Date
Nov 2007
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
830 MHz
Memory
16GB
Memory Size
512MB
GDDR6
Memory Type
GDDR3
256bit
Memory Bus
256bit
512.0GB/s
Bandwidth
53.12GB/s
Render Config
72
Compute Units
4
4608
Shading Units
320
288
TMUs
16
128
ROPs
16
72
RT Cores
-
128 KB per Array
L1 Cache
-
4 MB
L2 Cache
256 KB
128 MB
L3 Cache
-
Theoretical Performance
288.0 GPixel/s
Pixel Rate
10.69 GPixel/s
648.0 GTexel/s
Texture Rate
10.69 GTexel/s
41.47 TFLOPS
FP16 (half)
-
20.74 TFLOPS
FP32 (float)
427.5 GFLOPS
1296 GFLOPS
FP64 (double)
85.50 GFLOPS
Board Design
300W
TDP
75W
700 W
Suggested PSU
250 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 Processor
Navi 21
GPU Name
RV670
Navi 21 XT
(215-121000177)
GPU Variant
RV670 PRO
(215-0708003)
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
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
6.5
Shader Model
4.1
