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 6800 GT
CORE STATE
NV45
VRAM
256 MB
CLOCK SPEED
—
TDP
67 W
BUS WIDTH
256 bit
ARCHITECTURE
Curie
PROCESS
130 nm
LAUNCH DATE
2004
DETAILED SPECIFICATIONS
SPECIFICATION
RX 640 OEM
6800 GT
Core Specs
Shading Units
640
—
Shaders
640
—
TMUs
40
16
-60.0%
ROPs
16
16
0.0%
Compute Units
10
—
Clocks
GPU Clock
1295 MHz
350 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
GDDR3
Memory Bus
128 bit
256 bit
Bandwidth
96.00 GB/s
32.00 GB/s
Cache
L1 Cache
16 KB (per CU)
—
L2 Cache
512 KB
—
Performance
Pixel Rate
20.72 GPixel/s
5.600 GPixel/s
Texture Rate
51.80 GTexel/s
5.600 GTexel/s
FP32 (TFLOPS)
1.658 TFLOPS
—
FP64 (TFLOPS)
103.6 GFLOPS (1:16)
—
FP16 (TFLOPS)
1.658 TFLOPS (1:1)
—
Power
TDP
50 W
67 W
TDP (W)
50
67
+34.0%
Suggested PSU
250 W
250 W
Power Connectors
None
1x 6-pin
Architecture
Architecture
GCN 4.0
Curie
GPU Name
Polaris 23
NV45
Generation
Polaris
(RX 600)
GeForce 6 PCIe
(6800)
Process Size
14 nm
130 nm
Transistors
2,200 million
222 million
Die Size
103 mm²
287 mm²
Foundry
GlobalFoundries
TSMC
Density
21.4M / mm²
773.5K / mm²
API Support
DirectX
12 (12_0)
9.0c (9_3)
OpenGL
4.6
2.0 (full)
2.1 (partial)
Vulkan
1.3
—
OpenCL
2.1
—
Shader Model
6.7
3.0
Physical
Slot Width
Single-slot
Single-slot
Outputs
1x DisplayPort 1.4a2x mini-DisplayPort 1.4a
2x DVI1x S-Video
Bus Interface
PCIe 3.0 x8
PCIe 1.0 x16
Other
Production
End-of-life
End-of-life
Predecessor
Polaris
GeForce PCX
Successor
Vega
GeForce 7 PCIe