GPU Comparison
RADEON
AMD Radeon HD 7970
CORE STATE
Tahiti
VRAM
3 GB
CLOCK SPEED
—
TDP
250 W
BUS WIDTH
384 bit
ARCHITECTURE
GCN 1.0
PROCESS
28 nm
LAUNCH DATE
2012
VS
GEFORCE
GeForce GTX 660 Ti
CORE STATE
GK104
VRAM
2 GB
CLOCK SPEED
980 MHz
TDP
150 W
BUS WIDTH
192 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2012
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
HD 7970
GTX 660 Ti
Core Specs
Shading Units
2,048
1,344
-34.4%
Shaders
2,048
1,344
-34.4%
TMUs
128
112
-12.5%
ROPs
32
24
-25.0%
Compute Units
32
—
Clocks
Base Clock
—
915 MHz
Boost Clock
—
980 MHz
GPU Clock
925 MHz
—
Memory Clock
1375 MHz
5.5 Gbps effective
1502 MHz
6 Gbps effective
Memory
Memory Size
3 GB
2 GB
VRAM (MB)
3,072
2,048
-33.3%
Memory Type
GDDR5
GDDR5
Memory Bus
384 bit
192 bit
Bandwidth
264.0 GB/s
144.2 GB/s
Cache
L1 Cache
16 KB (per CU)
16 KB (per SMX)
L2 Cache
768 KB
384 KB
Performance
Pixel Rate
29.60 GPixel/s
27.44 GPixel/s
Texture Rate
118.4 GTexel/s
109.8 GTexel/s
FP32 (TFLOPS)
3.789 TFLOPS
2.634 TFLOPS
FP64 (TFLOPS)
947.2 GFLOPS (1:4)
109.8 GFLOPS (1:24)
Power
TDP
250 W
150 W
TDP (W)
250
150
-40.0%
Suggested PSU
600 W
450 W
Power Connectors
1x 6-pin + 1x 8-pin
2x 6-pin
Architecture
Architecture
GCN 1.0
Kepler
GPU Name
Tahiti
GK104
Generation
Southern Islands
(HD 7900)
GeForce 600
Process Size
28 nm
28 nm
Transistors
4,313 million
3,540 million
Die Size
352 mm²
294 mm²
Foundry
TSMC
TSMC
Density
12.3M / mm²
12.0M / mm²
API Support
DirectX
12 (11_1)
12 (11_0)
OpenGL
4.6
4.6
Vulkan
1.2.170
1.2.175
OpenCL
2.1 (1.2)
3.0
CUDA
—
3.0
Shader Model
6.5 (5.1)
6.5 (5.1)
Physical
Slot Width
Dual-slot
Dual-slot
Length
275 mm
10.8 inches
241 mm
9.5 inches
Height
111 mm
4.4 inches
—
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Other
Launch Price
549 USD
299 USD
Production
End-of-life
End-of-life
Predecessor
Northern Islands
GeForce 500
Successor
Sea Islands
GeForce 700