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GPU Comparison
AMD Radeon HD 6790 vs AMD Radeon RX 455 OEM
AMD Radeon HD 6790 vs AMD Radeon RX 455 OEM
VS
AMD Radeon HD 6790
AMD Radeon RX 455 OEM
We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6790 and 2GB VRAM Radeon RX 455 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 6790 's Advantages
Larger VRAM bandwidth (134.4GB/s vs 104.0GB/s)
32 additional rendering cores
AMD Radeon RX 455 OEM 's Advantages
Released 5 years and 2 months late
More VRAM (2GB vs 1GB)
Lower TDP (100W vs 150W)
Score
Benchmark
FP32 (float)
Radeon HD 6790
1.344 TFLOPS
Radeon RX 455 OEM
+20%
1.613 TFLOPS
Radeon HD 6790
VS
Radeon RX 455 OEM
Graphics Card
Apr 2011
Release Date
Jun 2016
Northern Islands
Generation
Arctic Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1050 MHz
Memory Clock
1625 MHz
Memory
1024MB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
134.4GB/s
Bandwidth
104.0GB/s
Render Config
-
SM Count
-
10
Compute Units
12
800
Shading Units
768
40
TMUs
48
16
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
8 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
256 KB
Theoretical Performance
13.44 GPixel/s
Pixel Rate
16.80 GPixel/s
33.60 GTexel/s
Texture Rate
50.40 GTexel/s
-
FP16 (half)
-
1344 GFLOPS
FP32 (float)
1.613 TFLOPS
-
FP64 (double)
100.8 GFLOPS
Graphics Processor
Barts
GPU Name
Tobago
Barts LE (215-0798002)
GPU Variant
Tobago PRO (215-0875010)
TeraScale 2
Architecture
GCN 2.0
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
1.7 billion
Transistors
2.08 billion
255 mm²
Die Size
160 mm²
Board Design
150W
TDP
100W
450 W
Suggested PSU
300 W
2x DVI 1x HDMI 1.3a 1x DisplayPort 1.1
Outputs
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
2x 6-pin
Power Connectors
1x 6-pin
Graphics Features
11.2 (11_0)
DirectX
12 (12_0)
4.4
OpenGL
4.6
1.2
OpenCL
2.0
N/A
Vulkan
1.2
-
CUDA
-
5.0
Shader Model
6.3
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