NVIDIA GeForce GTX 660 Ti vs AMD Radeon Sky 900
GPU · Specs Compare
Graphics Card
Release Date
Aug 2012
Mar 2013
Generation
GeForce 600
Radeon Sky
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
915 MHz
825 MHz
Boost Clock
980 MHz
950 MHz
Memory Clock
1502 MHz
1250 MHz
Memory
Memory Size
2GB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
192bit
384bit
Bandwidth
144.2GB/s
240.0GB/s
Render Config
Shading Units
1344
1792
TMUs
112
112
ROPs
24
32
L1 Cache
16 KB (per SMX)
16 KB (per CU)
L2 Cache
384 KB
768 KB
Compute Units
—
28
Theoretical Performance
Pixel Rate
27.44 GPixel/s
30.40 GPixel/s
Texture Rate
109.8 GTexel/s
106.4 GTexel/s
FP32 (float)
2.634 TFLOPS
3.405 TFLOPS
FP64 (double)
109.8 GFLOPS
851.2 GFLOPS
Graphics Processor
GPU Name
GK104
Tahiti
GPU Variant
GK104-300-KD-A2
Orthrus
Architecture
Kepler
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
3.54 billion
4.313 billion
Die Size
294 mm²
352 mm²
Board Design
TDP
150W
300W
Suggested PSU
450 W
700 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
1x DVI1x mini-DisplayPort 1.2
Power Connectors
2x 6-pin
2x 8-pin
Graphics Features
DirectX
12 (11_0)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
3.0
1.2
Vulkan
1.1
1.2
CUDA
3.0
—
Shader Model
5.1
5.1
▲ Specs Compare
Data sourced from official specifications and benchmark tests.