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GPU Comparison
AMD Radeon HD 7990 vs AMD Radeon RX 455 OEM
AMD Radeon HD 7990 vs AMD Radeon RX 455 OEM
VS
AMD Radeon HD 7990
AMD Radeon RX 455 OEM
We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7990 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 7990 's Advantages
Boost Clock1000MHz
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (288.0GB/s vs 104.0GB/s)
1280 additional rendering cores
AMD Radeon RX 455 OEM 's Advantages
Released 3 years and 2 months late
Lower TDP (100W vs 375W)
Score
Benchmark
FP32 (float)
Radeon HD 7990
+153%
4.096 TFLOPS
Radeon RX 455 OEM
1.613 TFLOPS
Radeon HD 7990
VS
Radeon RX 455 OEM
Graphics Card
Apr 2013
Release Date
Jun 2016
Southern Islands
Generation
Arctic Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
950 MHz
Base Clock
-
1000 MHz
Boost Clock
-
1500 MHz
Memory Clock
1625 MHz
Memory
3GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
128bit
288.0GB/s
Bandwidth
104.0GB/s
Render Config
-
SM Count
-
32
Compute Units
12
2048
Shading Units
768
128
TMUs
48
32
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
768 KB
L2 Cache
256 KB
Theoretical Performance
32.00 GPixel/s
Pixel Rate
16.80 GPixel/s
128.0 GTexel/s
Texture Rate
50.40 GTexel/s
-
FP16 (half)
-
4.096 TFLOPS
FP32 (float)
1.613 TFLOPS
1024 GFLOPS
FP64 (double)
100.8 GFLOPS
Graphics Processor
Malta
GPU Name
Tobago
Malta XT (215-0849026)
GPU Variant
Tobago PRO (215-0875010)
GCN 1.0
Architecture
GCN 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
4.313 billion
Transistors
2.08 billion
365 mm²
Die Size
160 mm²
Board Design
375W
TDP
100W
750 W
Suggested PSU
300 W
1x DVI 4x mini-DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
2x 8-pin
Power Connectors
1x 6-pin
Graphics Features
12 (11_1)
DirectX
12 (12_0)
4.6
OpenGL
4.6
1.2
OpenCL
2.0
1.2
Vulkan
1.2
-
CUDA
-
5.1
Shader Model
6.3
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