Home GPU Comparison NVIDIA GeForce GTX 660 Ti vs ATI Radeon HD 2950 XTX

NVIDIA GeForce GTX 660 Ti vs ATI Radeon HD 2950 XTX

We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 660 Ti and 512MB VRAM Radeon HD 2950 XTX 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
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (144.2GB/s vs 72.06GB/s)
1024 additional rendering cores
ATI Radeon HD 2950 XTX 's Advantages
Lower TDP (110W vs 150W)

Score

Benchmark

FP32 (float)
GeForce GTX 660 Ti +429%
2.634 TFLOPS
Radeon HD 2950 XTX
0.497 TFLOPS
VS

Graphics Card

Aug 2012
Release Date
Unknown
GeForce 600
Generation
Radeon R600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16

Clock Speeds

915 MHz
Base Clock
-
980 MHz
Boost Clock
-
1502 MHz
Memory Clock
1126 MHz

Memory

2GB
Memory Size
512MB
GDDR5
Memory Type
GDDR4
192bit
Memory Bus
256bit
144.2GB/s
Bandwidth
72.06GB/s

Render Config

-
Compute Units
4
-
-
-
1344
Shading Units
320
112
TMUs
16
24
ROPs
16
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
-
384 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

27.44 GPixel/s
Pixel Rate
12.43 GPixel/s
109.8 GTexel/s
Texture Rate
12.43 GTexel/s
-
-
-
2.634 TFLOPS
FP32 (float)
497.3 GFLOPS
109.8 GFLOPS
FP64 (double)
99.46 GFLOPS

Board Design

150W
TDP
110W
450 W
Suggested PSU
300 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI 1x S-Video
2x 6-pin
Power Connectors
1x 6-pin

Graphics Processor

GK104
GPU Name
RV670
GK104-300-KD-A2
GPU Variant
RV670 XTX (215-0708004)
Kepler
Architecture
TeraScale
TSMC
Foundry
TSMC
28 nm
Process Size
55 nm
3.54 billion
Transistors
0.666 billion
294 mm²
Die Size
192 mm²

Graphics Features

12 (11_0)
DirectX
10.1 (10_1)
4.6
OpenGL
3.3 (full) 4.0 (partial)
3.0
OpenCL
N/A
1.1
Vulkan
N/A
3.0
CUDA
-
5.1
Shader Model
4.1

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