Radeon HD 7970 X2 vs Radeon HD 7990
We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 X2 and 3GB VRAM Radeon HD 7990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon HD 7990 's Advantages
Released 8 months late
Boost Clock1000MHz
Larger VRAM bandwidth (288.0GB/s vs 264.0GB/s)
Lower TDP (375W vs 500W)
Score
Benchmark
FP32 (float)
Radeon HD 7970 X2
3789
Radeon HD 7990
+8%
4096
Graphics Card
Aug 2012
Release Date
Apr 2013
Southern Islands
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
950 MHz
-
Boost Clock
1000 MHz
1375 MHz
Memory Clock
1500 MHz
Memory
3GB
Memory Size
3GB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
384bit
264.0GB/s
Bandwidth
288.0GB/s
Render Config
32
Compute Units
32
2048
Shading Units
2048
128
TMUs
128
32
ROPs
32
16 KB (per CU)
L1 Cache
16 KB (per CU)
768 KB
L2 Cache
768 KB
Theoretical Performance
29.60 GPixel/s
Pixel Rate
32.00 GPixel/s
118.4 GTexel/s
Texture Rate
128.0 GTexel/s
3.789 TFLOPS
FP32 (float)
4.096 TFLOPS
947.2 GFLOPS
FP64 (double)
1024 GFLOPS
Board Design
500W
TDP
375W
900 W
Suggested PSU
750 W
2x DVI
1x HDMI 1.4a
2x mini-DisplayPort 1.2
Outputs
1x DVI
4x mini-DisplayPort 1.2
3x 8-pin
Power Connectors
2x 8-pin
Graphics Processor
New Zealand
GPU Name
Malta
-
GPU Variant
Malta XT
(215-0849026)
GCN 1.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
4.313 billion
Transistors
4.313 billion
352 mm²
Die Size
365 mm²
Graphics Features
12 (11_1)
DirectX
12 (11_1)
4.6
OpenGL
4.6
1.2
OpenCL
1.2
1.2
Vulkan
1.2
5.1
Shader Model
5.1
