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GPU Comparison
AMD Radeon HD 7990 vs AMD Radeon HD 6390
AMD Radeon HD 7990 vs AMD Radeon HD 6390
VS
AMD Radeon HD 7990
AMD Radeon HD 6390
We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7990 and 1024MB VRAM Radeon HD 6390 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 7990 's Advantages
Released 1 years and 9 months late
Boost Clock1000MHz
More VRAM (3GB vs 1GB)
Larger VRAM bandwidth (288.0GB/s vs 16.00GB/s)
1728 additional rendering cores
AMD Radeon HD 6390 's Advantages
Lower TDP (39W vs 375W)
Score
Benchmark
FP32 (float)
Radeon HD 7990
+1063%
4.096 TFLOPS
Radeon HD 6390
0.352 TFLOPS
Radeon HD 7990
VS
Radeon HD 6390
Graphics Card
Apr 2013
Release Date
Jul 2011
Southern Islands
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
950 MHz
Base Clock
-
1000 MHz
Boost Clock
-
1500 MHz
Memory Clock
500 MHz
Memory
3GB
Memory Size
1024MB
GDDR5
Memory Type
DDR2
384bit
Memory Bus
128bit
288.0GB/s
Bandwidth
16.00GB/s
Render Config
-
SM Count
-
32
Compute Units
4
2048
Shading Units
320
128
TMUs
16
32
ROPs
8
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
768 KB
L2 Cache
256 KB
Theoretical Performance
32.00 GPixel/s
Pixel Rate
4.400 GPixel/s
128.0 GTexel/s
Texture Rate
8.800 GTexel/s
-
FP16 (half)
-
4.096 TFLOPS
FP32 (float)
352.0 GFLOPS
1024 GFLOPS
FP64 (double)
-
Graphics Processor
Malta
GPU Name
Redwood
Malta XT (215-0849026)
GPU Variant
Redwood LE
GCN 1.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
4.313 billion
Transistors
0.627 billion
365 mm²
Die Size
104 mm²
Board Design
375W
TDP
39W
750 W
Suggested PSU
200 W
1x DVI 4x mini-DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.3a 1x VGA
2x 8-pin
Power Connectors
None
Graphics Features
12 (11_1)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
1.2
OpenCL
1.2
1.2
Vulkan
N/A
-
CUDA
-
5.1
Shader Model
5.0
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