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GPU Comparison
AMD Radeon HD 6990 vs AMD Radeon HD 7970 X2
AMD Radeon HD 6990 vs AMD Radeon HD 7970 X2
VS
AMD Radeon HD 6990
AMD Radeon HD 7970 X2
We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 and 3GB VRAM Radeon HD 7970 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 6990 's Advantages
Lower TDP (375W vs 500W)
AMD Radeon HD 7970 X2 's Advantages
Released 1 years and 5 months late
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (264.0GB/s vs 160.0GB/s)
512 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 6990
2.55 TFLOPS
Radeon HD 7970 X2
+48%
3.789 TFLOPS
Radeon HD 6990
VS
Radeon HD 7970 X2
Graphics Card
Mar 2011
Release Date
Aug 2012
Northern Islands
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1250 MHz
Memory Clock
1375 MHz
Memory
2GB
Memory Size
3GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
384bit
160.0GB/s
Bandwidth
264.0GB/s
Render Config
-
SM Count
-
24
Compute Units
32
1536
Shading Units
2048
96
TMUs
128
32
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
8 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
768 KB
Theoretical Performance
26.56 GPixel/s
Pixel Rate
29.60 GPixel/s
79.68 GTexel/s
Texture Rate
118.4 GTexel/s
-
FP16 (half)
-
2.550 TFLOPS
FP32 (float)
3.789 TFLOPS
637.4 GFLOPS
FP64 (double)
947.2 GFLOPS
Graphics Processor
Antilles
GPU Name
New Zealand
Antilles XT (215-0807027)
GPU Variant
-
TeraScale 3
Architecture
GCN 1.0
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
2.64 billion
Transistors
4.313 billion
389 mm²
Die Size
352 mm²
Board Design
375W
TDP
500W
750 W
Suggested PSU
900 W
1x DVI 4x mini-DisplayPort 1.2
Outputs
2x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
2x 8-pin
Power Connectors
3x 8-pin
Graphics Features
11.2 (11_0)
DirectX
12 (11_1)
4.4
OpenGL
4.6
1.2
OpenCL
1.2
N/A
Vulkan
1.2
-
CUDA
-
5.0
Shader Model
5.1
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