Home GPU Comparison AMD Radeon HD 7970 X2 vs NVIDIA GeForce GTX 660 OEM

AMD Radeon HD 7970 X2 vs NVIDIA GeForce GTX 660 OEM

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 X2 and 1536MB VRAM GeForce GTX 660 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7970 X2 's Advantages
More VRAM (3GB vs 1536GB)
Larger VRAM bandwidth (264.0GB/s vs 134.4GB/s)
896 additional rendering cores
NVIDIA GeForce GTX 660 OEM 's Advantages
Boost Clock888MHz
Lower TDP (130W vs 500W)

Score

Benchmark

FP32 (float)
Radeon HD 7970 X2 +85%
3.789 TFLOPS
GeForce GTX 660 OEM
2.046 TFLOPS
VS

Graphics Card

Aug 2012
Release Date
Aug 2012
Southern Islands
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
Base Clock
823 MHz
-
Boost Clock
888 MHz
1375 MHz
Memory Clock
1400 MHz

Memory

3GB
Memory Size
1536MB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
192bit
264.0GB/s
Bandwidth
134.4GB/s

Render Config

32
Compute Units
-
-
-
-
2048
Shading Units
1152
128
TMUs
96
32
ROPs
24
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
16 KB (per SMX)
768 KB
L2 Cache
384 KB
-
-
-

Theoretical Performance

29.60 GPixel/s
Pixel Rate
21.31 GPixel/s
118.4 GTexel/s
Texture Rate
85.25 GTexel/s
-
-
-
3.789 TFLOPS
FP32 (float)
2.046 TFLOPS
947.2 GFLOPS
FP64 (double)
85.25 GFLOPS

Board Design

500W
TDP
130W
900 W
Suggested PSU
300 W
2x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
Outputs
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
3x 8-pin
Power Connectors
1x 6-pin

Graphics Processor

New Zealand
GPU Name
GK104
-
GPU Variant
GK104-200-KD-A2
GCN 1.0
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
4.313 billion
Transistors
3.54 billion
352 mm²
Die Size
294 mm²

Graphics Features

12 (11_1)
DirectX
12 (11_0)
4.6
OpenGL
4.6
1.2
OpenCL
3.0
1.2
Vulkan
1.1
-
CUDA
3.0
5.1
Shader Model
5.1

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