NEC V 20
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One of the faster regular XT processors out there! The NEC V20 is a reversed engineered Intel 8088 processor and is slightly faster despite it runs at 8MHz as well.

I installed the NEC V20 in my ARC ProTurbo 88 system (came with Intel 8088 fitted) and noticed faster boottimes and the CPU seems to run a bit cooler as well.

Specifications
Core / Codename
8088
Clockfrequency
8MHz
Front Side Bus
8MHz
Multiplier
1x
vCore
5V
L1 cache
0KB
L2 cache
None
sSpec
N/A
Chip date
8713
Stepping
?
Socket
40P DIP
Transistor count
?
Condition
CPU only
Engineering sample?
No

Benchmarks
CPU (chipset) DOSBench score
Pentium 100 (430VX)
21577.00
Pentium 90 (430VX)
19734.00
K5 PR166 (430VX)
16460.00
Am5x86 -P75 (UMC PCI)
16295.00
Pentium 75 (430VX)
16147.00
Pentium Overdrive 83 (UMC PCI)
15764.00
Kingston TC5x86 /133 (UMC PCI)
15189.00
Am486 DX4/120 (UMC PCI)
15091.00
Cx5x86 100GP (UMC PCI)
15022.00
K5 PR133 (430VX)
14360.00
Cx486DX4 100GP4 (UMC PCI)
14159.00
K5 PR100 (430VX)
13836.00
Pentium 60 (Hendrixx)
13487.00
Am486 DX4/100 (UMC PCI)
12677.00
K5 PR90 (430VX)
12567.00
i486 DX4/100 (UMC PCI)
12256.00
ST486DX2 80GS (UMC PCI)
11670.00
80486 80MHz (UMC PCI)
11670.00
Cx486DX2 80GP (UMC PCI)
11670.00
5k86 P75 (430VX)
10355.00
Am486 DX2/80 (UMC PCI)
10241.00
TI486DX2 G66 (UMC PCI)
9765.00
Cx486DX2 66 (UMC PCI)
9674.00
80486 66MHz (UMC PCI)
9673.00
i486 DX2/66 (UMC PCI)
8727.00
Am486 DX2/66 (UMC PCI)
8613.00
DX20ODPR 66 (UMC PCI)
8519.00
i486 DX2/66 (UMC PCI)
8519.00
Am486 DX2/50 (UMC PCI)
6592.00
ODP486SX 25 (UMC PCI)
6590.00
DX20DP 50 (UMC PCI)
6590.00
i486 DX2/50 (UMC PCI)
6590.00
i486 DX50 (UMC PCI)
6577.00
Cx486DX 40GP (UMC PCI)
5370.00
i486 DX33 (UMC PCI)
4425.00
Cx486DLC 33GP (ETEQ+FPU)
2698.00
i386 DX25-IV (OPTi+FPU)
1348.00
i486 SX2/50 (UMC PCI)
632.00
Am386 DX33 (ETEQ+FPU)
567.00
i486 SX33 (UMC PCI)
424.00
Cx486DLC 33GP (ETEQ)
357.00
V 20 (? + FPU)
333.00
8088 -1-P (? + FPU)
321.00
i486 SX25 (UMC PCI)
320.00
i486 SX20 (UMC PCI)
256.00
Am386 DX33 (ETEQ)
251.00
i386 SX25 (WDC ISA)
137.00
i386 DX25-IV (OPTi)
134.00
CS80C286 -20 (?)
106.00
R80286 8 (?)
43.00
V 20 (?)
22.00
8088 -1-P (?)
16.00
8088 D (?)
8.00