Radeon RX 6800 XT vs Radeon R9 270X
We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6800 XT and 2GB VRAM Radeon R9 270X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6800 XT 's Advantages
Released 7 years late
Boost Clock has increased by 114% (2250MHz vs 1050MHz)
More VRAM (16GB vs 2GB)
Larger VRAM bandwidth (512.0GB/s vs 179.2GB/s)
3328 additional rendering cores
Radeon R9 270X 's Advantages
Lower TDP (180W vs 300W)
Score
Benchmark
FP32 (float)
Radeon RX 6800 XT
+671%
20740
Radeon R9 270X
2688
3DMark Time Spy
Radeon RX 6800 XT
+992%
19329
Radeon R9 270X
1769
Graphics Card
Oct 2020
Release Date
Oct 2013
Navi II
Generation
Volcanic Islands
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
1825 MHz
Base Clock
1000 MHz
2250 MHz
Boost Clock
1050 MHz
2000 MHz
Memory Clock
1400 MHz
Memory
16GB
Memory Size
2GB
GDDR6
Memory Type
GDDR5
256bit
Memory Bus
256bit
512.0GB/s
Bandwidth
179.2GB/s
Render Config
72
Compute Units
20
4608
Shading Units
1280
288
TMUs
80
128
ROPs
32
72
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per CU)
4 MB
L2 Cache
512 KB
128 MB
L3 Cache
-
Theoretical Performance
288.0 GPixel/s
Pixel Rate
33.60 GPixel/s
648.0 GTexel/s
Texture Rate
84.00 GTexel/s
41.47 TFLOPS
FP16 (half)
-
20.74 TFLOPS
FP32 (float)
2.688 TFLOPS
1296 GFLOPS
FP64 (double)
168.0 GFLOPS
Board Design
300W
TDP
180W
700 W
Suggested PSU
450 W
1x HDMI 2.1
2x DisplayPort 1.4a
1x USB Type-C
Outputs
2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
2x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
Navi 21
GPU Name
Curacao
Navi 21 XT
(215-121000177)
GPU Variant
Curacao XT
(215-0848004)
RDNA 2.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
7 nm
Process Size
28 nm
26.8 billion
Transistors
2.8 billion
520 mm²
Die Size
212 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_1)
4.6
OpenGL
4.6
2.1
OpenCL
1.2
1.3
Vulkan
1.2
6.5
Shader Model
5.1
