GPU Comparison
RADEON
AMD Radeon RX 640 OEM
CORE STATE
Polaris 23
VRAM
4 GB
CLOCK SPEED
—
TDP
50 W
BUS WIDTH
128 bit
ARCHITECTURE
GCN 4.0
PROCESS
14 nm
LAUNCH DATE
2020
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
RX 640 OEM
GTX 660 Ti
Core Specs
Shading Units
640
1,344
+110.0%
Shaders
640
1,344
+110.0%
TMUs
40
112
+180.0%
ROPs
16
24
+50.0%
Compute Units
10
—
Clocks
Base Clock
—
915 MHz
Boost Clock
—
980 MHz
GPU Clock
1295 MHz
—
Memory Clock
1500 MHz
6 Gbps effective
1502 MHz
6 Gbps effective
Memory
Memory Size
4 GB
2 GB
VRAM (MB)
4,096
2,048
-50.0%
Memory Type
GDDR5
GDDR5
Memory Bus
128 bit
192 bit
Bandwidth
96.00 GB/s
144.2 GB/s
Cache
L1 Cache
16 KB (per CU)
16 KB (per SMX)
L2 Cache
512 KB
384 KB
Performance
Pixel Rate
20.72 GPixel/s
27.44 GPixel/s
Texture Rate
51.80 GTexel/s
109.8 GTexel/s
FP32 (TFLOPS)
1.658 TFLOPS
2.634 TFLOPS
FP64 (TFLOPS)
103.6 GFLOPS (1:16)
109.8 GFLOPS (1:24)
FP16 (TFLOPS)
1.658 TFLOPS (1:1)
—
Power
TDP
50 W
150 W
TDP (W)
50
150
+200.0%
Suggested PSU
250 W
450 W
Power Connectors
None
2x 6-pin
Architecture
Architecture
GCN 4.0
Kepler
GPU Name
Polaris 23
GK104
Generation
Polaris
(RX 600)
GeForce 600
Process Size
14 nm
28 nm
Transistors
2,200 million
3,540 million
Die Size
103 mm²
294 mm²
Foundry
GlobalFoundries
TSMC
Density
21.4M / mm²
12.0M / mm²
API Support
DirectX
12 (12_0)
12 (11_0)
OpenGL
4.6
4.6
Vulkan
1.3
1.2.175
OpenCL
2.1
3.0
CUDA
—
3.0
Shader Model
6.7
6.5 (5.1)
Physical
Slot Width
Single-slot
Dual-slot
Length
—
241 mm
9.5 inches
Outputs
1x DisplayPort 1.4a2x mini-DisplayPort 1.4a
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Bus Interface
PCIe 3.0 x8
PCIe 3.0 x16
Other
Launch Price
—
299 USD
Production
End-of-life
End-of-life
Predecessor
Polaris
GeForce 500
Successor
Vega
GeForce 700