NVIDIA GeForce GTX 660 Ti vs AMD Radeon HD 7950 Mac Edition
We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Ti and 3GB VRAM Radeon HD 7950 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GTX 660 Ti 's Advantages
Boost Clock980MHz
Lower TDP (150W vs 200W)
AMD Radeon HD 7950 Mac Edition 's Advantages
Released 7 months late
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (240.0GB/s vs 144.2GB/s)
448 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce GTX 660 Ti
2.634 TFLOPS
Radeon HD 7950 Mac Edition
+8%
2.867 TFLOPS
Graphics Card
Aug 2012
Release Date
Mar 2013
GeForce 600
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
915 MHz
Base Clock
-
980 MHz
Boost Clock
-
1502 MHz
Memory Clock
1250 MHz
Memory
2GB
Memory Size
3GB
GDDR5
Memory Type
GDDR5
192bit
Memory Bus
384bit
144.2GB/s
Bandwidth
240.0GB/s
Render Config
-
Compute Units
28
-
-
-
1344
Shading Units
1792
112
TMUs
112
24
ROPs
32
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
16 KB (per CU)
384 KB
L2 Cache
768 KB
-
-
-
Theoretical Performance
27.44 GPixel/s
Pixel Rate
25.60 GPixel/s
109.8 GTexel/s
Texture Rate
89.60 GTexel/s
-
-
-
2.634 TFLOPS
FP32 (float)
2.867 TFLOPS
109.8 GFLOPS
FP64 (double)
716.8 GFLOPS
Board Design
150W
TDP
200W
450 W
Suggested PSU
550 W
2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
Outputs
1x DVI
1x HDMI 1.4a
2x mini-DisplayPort 1.2
2x 6-pin
Power Connectors
2x 6-pin
Graphics Processor
GK104
GPU Name
Tahiti
GK104-300-KD-A2
GPU Variant
Tahiti PRO
(215-0821056)
Kepler
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
3.54 billion
Transistors
4.313 billion
294 mm²
Die Size
352 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
3.0
OpenCL
1.2
1.1
Vulkan
1.2
3.0
CUDA
-
5.1
Shader Model
5.1
