AMD Radeon R9 270X vs ATI Radeon HD 3870
We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 270X and 512MB VRAM Radeon HD 3870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 270X 's Advantages
Released 5 years and 11 months late
Boost Clock1050MHz
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (179.2GB/s vs 72.06GB/s)
960 additional rendering cores
ATI Radeon HD 3870 's Advantages
Lower TDP (106W vs 180W)
Score
Benchmark
FP32 (float)
Radeon R9 270X
+440%
2.688 TFLOPS
Radeon HD 3870
0.497 TFLOPS
Graphics Card
Oct 2013
Release Date
Nov 2007
Volcanic Islands
Generation
Radeon R600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
1000 MHz
Base Clock
-
1050 MHz
Boost Clock
-
1400 MHz
Memory Clock
1126 MHz
Memory
2GB
Memory Size
512MB
GDDR5
Memory Type
GDDR4
256bit
Memory Bus
256bit
179.2GB/s
Bandwidth
72.06GB/s
Render Config
20
Compute Units
4
-
-
-
1280
Shading Units
320
80
TMUs
16
32
ROPs
16
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
-
512 KB
L2 Cache
256 KB
-
-
-
Theoretical Performance
33.60 GPixel/s
Pixel Rate
12.43 GPixel/s
84.00 GTexel/s
Texture Rate
12.43 GTexel/s
-
-
-
2.688 TFLOPS
FP32 (float)
497.3 GFLOPS
168.0 GFLOPS
FP64 (double)
99.46 GFLOPS
Board Design
180W
TDP
106W
450 W
Suggested PSU
300 W
2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
Outputs
2x DVI
1x S-Video
2x 6-pin
Power Connectors
1x 6-pin
Graphics Processor
Curacao
GPU Name
RV670
Curacao XT
(215-0848004)
GPU Variant
RV670 XT
(215-0708005)
GCN 1.0
Architecture
TeraScale
TSMC
Foundry
TSMC
28 nm
Process Size
55 nm
2.8 billion
Transistors
0.666 billion
212 mm²
Die Size
192 mm²
Graphics Features
12 (11_1)
DirectX
10.1 (10_1)
4.6
OpenGL
3.3 (full)
4.0 (partial)
1.2
OpenCL
N/A
1.2
Vulkan
N/A
-
-
-
5.1
Shader Model
4.1
