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GPU Comparison
AMD Radeon R9 390 X2 vs AMD Radeon HD 8770 OEM
AMD Radeon R9 390 X2 vs AMD Radeon HD 8770 OEM
VS
AMD Radeon R9 390 X2
AMD Radeon HD 8770 OEM
We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 X2 and 1024MB VRAM Radeon HD 8770 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 390 X2 's Advantages
Released 2 years late
More VRAM (8GB vs 1GB)
Larger VRAM bandwidth (345.6GB/s vs 96.00GB/s)
1664 additional rendering cores
AMD Radeon HD 8770 OEM 's Advantages
Lower TDP (85W vs 580W)
Score
Benchmark
FP32 (float)
Radeon R9 390 X2
+172%
5.12 TFLOPS
Radeon HD 8770 OEM
1.882 TFLOPS
Radeon R9 390 X2
VS
Radeon HD 8770 OEM
Graphics Card
Sep 2015
Release Date
Sep 2013
Pirate Islands
Generation
Sea Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1350 MHz
Memory Clock
1500 MHz
Memory
8GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
512bit
Memory Bus
128bit
345.6GB/s
Bandwidth
96.00GB/s
Render Config
-
SM Count
-
40
Compute Units
14
2560
Shading Units
896
160
TMUs
56
64
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
1024 KB
L2 Cache
256 KB
Theoretical Performance
64.00 GPixel/s
Pixel Rate
16.80 GPixel/s
160.0 GTexel/s
Texture Rate
58.80 GTexel/s
-
FP16 (half)
-
5.120 TFLOPS
FP32 (float)
1.882 TFLOPS
640.0 GFLOPS
FP64 (double)
117.6 GFLOPS
Graphics Processor
Grenada
GPU Name
Bonaire
Grenada PRO (215-0880030)
GPU Variant
Bonaire XT (215-0839039)
GCN 2.0
Architecture
GCN 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
6.2 billion
Transistors
2.08 billion
438 mm²
Die Size
160 mm²
Board Design
580W
TDP
85W
950 W
Suggested PSU
250 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
4x 8-pin
Power Connectors
1x 6-pin
Graphics Features
12 (12_0)
DirectX
12 (12_0)
4.6
OpenGL
4.6
2.0
OpenCL
2.0
1.2
Vulkan
1.2
-
CUDA
-
6.3
Shader Model
6.3
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9
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