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 8400
CORE STATE
G98S
VRAM
256 MB
CLOCK SPEED
—
TDP
25 W
BUS WIDTH
64 bit
ARCHITECTURE
Tesla
PROCESS
65 nm
LAUNCH DATE
2007
DETAILED SPECIFICATIONS
SPECIFICATION
RX 640 OEM
8400
Core Specs
Shading Units
640
8
-98.8%
Shaders
640
8
-98.8%
TMUs
40
4
-90.0%
ROPs
16
4
-75.0%
Compute Units
10
—
SM Count
—
1
Clocks
GPU Clock
1295 MHz
540 MHz
Shader Clock
—
1300 MHz
Memory Clock
1500 MHz
6 Gbps effective
500 MHz
1000 Mbps effective
Memory
Memory Size
4 GB
256 MB
VRAM (MB)
4,096
256
-93.8%
Memory Type
GDDR5
DDR2
Memory Bus
128 bit
64 bit
Bandwidth
96.00 GB/s
8.000 GB/s
Cache
L1 Cache
16 KB (per CU)
—
L2 Cache
512 KB
16 KB
Performance
Pixel Rate
20.72 GPixel/s
2.160 GPixel/s
Texture Rate
51.80 GTexel/s
2.160 GTexel/s
FP32 (TFLOPS)
1.658 TFLOPS
20.80 GFLOPS
FP64 (TFLOPS)
103.6 GFLOPS (1:16)
—
FP16 (TFLOPS)
1.658 TFLOPS (1:1)
—
Power
TDP
50 W
25 W
TDP (W)
50
25
-50.0%
Suggested PSU
250 W
200 W
Power Connectors
None
None
Architecture
Architecture
GCN 4.0
Tesla
GPU Name
Polaris 23
G98S
Generation
Polaris
(RX 600)
GeForce 8
(8400)
Process Size
14 nm
65 nm
Transistors
2,200 million
210 million
Die Size
103 mm²
86 mm²
Foundry
GlobalFoundries
UMC
Density
21.4M / mm²
2.4M / mm²
API Support
DirectX
12 (12_0)
11.1 (10_0)
OpenGL
4.6
3.3
Vulkan
1.3
—
OpenCL
2.1
1.1
CUDA
—
1.1
Shader Model
6.7
4.0
Physical
Slot Width
Single-slot
Single-slot
Outputs
1x DisplayPort 1.4a2x mini-DisplayPort 1.4a
1x DVI1x VGA1x S-Video
Bus Interface
PCIe 3.0 x8
PCIe 2.0 x16
Other
Production
End-of-life
End-of-life
Predecessor
Polaris
GeForce 7 PCIe
Successor
Vega
GeForce 9