AMD Radeon HD 6990M vs NVIDIA GeForce GTX 660
GPU Specs Compare
Graphics Card
Release Date
Jul 2011
Sep 2012
Generation
Vancouver
GeForce 600
Type
Mobile
Desktop
Bus Interface
MXM-B (3.0)
PCIe 3.0 x16
Clock Speeds
Memory Clock
900 MHz
1502 MHz
Base Clock
-
980 MHz
Boost Clock
-
1032 MHz
Memory
Memory Size
2GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
192bit
Bandwidth
115.2GB/s
144.2GB/s
Render Config
Compute Units
14
-
Shading Units
1120
960
TMUs
56
80
ROPs
32
24
L1 Cache
8 KB (per CU)
16 KB (per SMX)
L2 Cache
512 KB
384 KB
Theoretical Performance
Pixel Rate
22.88 GPixel/s
20.64 GPixel/s
Texture Rate
40.04 GTexel/s
82.56 GTexel/s
FP32 (float)
1.602 TFLOPS
1.981 TFLOPS
FP64 (double)
-
82.56 GFLOPS
Graphics Processor
GPU Name
Blackcomb
GK106
GPU Variant
Blackcomb XTX(216-0811030)
GK106-400-A1
Architecture
TeraScale 2
Kepler
Foundry
TSMC
TSMC
Process Size
40 nm
28 nm
Transistors
1.7 billion
2.54 billion
Die Size
212 mm²
221 mm²
Board Design
TDP
100W
140W
Outputs
No outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
None
1x 6-pin
Suggested PSU
-
300 W
Graphics Features
DirectX
11.2 (11_0)
12 (11_0)
OpenGL
4.4
4.6
OpenCL
1.2
3.0
Vulkan
N/A
1.1
Shader Model
5.0
5.1
CUDA
-
3.0
📊 Benchmark
3DMark Time Spy
-
1,194
3DMark Time Spy Extreme
-
260
OctaneBench
-
27
Blender
-
111