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GPU Comparison
AMD Radeon R9 390 vs NVIDIA GeForce GT 645 OEM
AMD Radeon R9 390 vs NVIDIA GeForce GT 645 OEM
VS
AMD Radeon R9 390
NVIDIA GeForce GT 645 OEM
We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 and 1024MB VRAM GeForce GT 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 390 's Advantages
Released 3 years and 2 months late
More VRAM (8GB vs 1GB)
Larger VRAM bandwidth (384.0GB/s vs 91.87GB/s)
2272 additional rendering cores
NVIDIA GeForce GT 645 OEM 's Advantages
Lower TDP (102W vs 275W)
Score
Benchmark
FP32 (float)
Radeon R9 390
+472%
5.12 TFLOPS
GeForce GT 645 OEM
0.894 TFLOPS
Radeon R9 390
VS
GeForce GT 645 OEM
Graphics Card
Jun 2015
Release Date
Apr 2012
Pirate Islands
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1500 MHz
Memory Clock
957 MHz
Memory
8GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
512bit
Memory Bus
192bit
384.0GB/s
Bandwidth
91.87GB/s
Render Config
-
SM Count
6
40
Compute Units
-
2560
Shading Units
288
160
TMUs
48
64
ROPs
24
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
64 KB (per SM)
1024 KB
L2 Cache
384 KB
Theoretical Performance
64.00 GPixel/s
Pixel Rate
9.312 GPixel/s
160.0 GTexel/s
Texture Rate
37.25 GTexel/s
-
FP16 (half)
-
5.120 TFLOPS
FP32 (float)
894.0 GFLOPS
640.0 GFLOPS
FP64 (double)
74.50 GFLOPS
Graphics Processor
Grenada
GPU Name
GF114
Grenada PRO (215-0880030)
GPU Variant
-
GCN 2.0
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
6.2 billion
Transistors
1.95 billion
438 mm²
Die Size
332 mm²
Board Design
275W
TDP
102W
600 W
Suggested PSU
300 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI 1x mini-HDMI 1.3a
1x 6-pin + 1x 8-pin
Power Connectors
-
Graphics Features
12 (12_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
2.0
OpenCL
1.1
1.2
Vulkan
N/A
-
CUDA
2.1
6.3
Shader Model
5.1
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