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AMD-X5-160 - AMD
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General Info
Model NumberAMD-X5-160
Introduction1996 (announced)
General Specs
Frequency160 MHz
Bus typeFSB
Bus speed40 MHz
Bus rate40 MT/s
Clock multiplier4
CPUID04Ex, 04Fx
Core Name5x
Process350 nm
Die43 mm²
Word Size32 bit
Max Memory4 GiB
Max SMP1-Way (Uniprocessor)
Vcore3.45 V ± 0.15 V
Tcase0 °C – 85 °C

AMD-X5-160 was high-performance 486-based microprocessor announced by AMD in 1996 as part of their Am5x86 family. This processor had a clock multiplier of 3x, operating at 150 MHz with a bus speed of 50 MHz. This MPU had all the features offered by AMD's Enhanced Am486 such as a large 16 KB L1$ and various power management features. Note: This chip was never released.

The AMD-X5-160 showed up in various documents by AMD including some manuals by boards manufacturers. It is also mentioned in AMD's BIOS dev guide from August, 1995. However AMD never actually ended up releasing any to the market. It has been speculated that AMD was afraid this chip might compete with their K5 family. Nevertheless, this didn't stop some computer companies from selling 160 MHz Am5x86 systems which used overclocked AMD-X5-133. Additionally some fake AMD-X5-160 have been circulated (those were faked for people buying them at the time, not faked for collectors). Fake 160 chips were most likely AMD-X5-133ADZ which had a high operating temperature which made them fairly stable overclocked to 160 MHz anyway.


Main article: 80486 § Cache
Cache Info [Edit Values]
L1$ 16 KiB
16,384 B
0.0156 MiB
1x16 KiB 4-way set associative (unified, write-back policy)


This chip had no integrated graphics processing unit.


  • System Management Mode (SMM)
  • P75+ P-Rating

See also[edit]

Facts about "AMD-X5-160 - AMD"
base frequency160 MHz (0.16 GHz, 160,000 kHz) +
bus rate40 MT/s (0.04 GT/s, 40,000 kT/s) +
bus speed40 MHz (0.04 GHz, 40,000 kHz) +
bus typeFSB +
clock multiplier4 +
core count1 +
core name5x +
core voltage3.45 V (34.5 dV, 345 cV, 3,450 mV) +
core voltage tolerance0.15 V +
cpuid04Ex + and 04Fx +
designerAMD +
die area43 mm² (0.0667 in², 0.43 cm², 43,000,000 µm²) +
familyAm5x86 +
first announced1996 +
full page nameamd/am5x86/amd-x5-160 +
has featureSystem Management Mode +
instance ofmicroprocessor +
l1$ description4-way set associative +
l1$ size16 KiB (16,384 B, 0.0156 MiB) +
ldate1996 +
manufacturerAMD +
market segmentDesktop +
max case temperature358.15 K (85 °C, 185 °F, 644.67 °R) +
max cpu count1 +
max memory4,096 MiB (4,194,304 KiB, 4,294,967,296 B, 4 GiB, 0.00391 TiB) +
microarchitecture80486 +
min case temperature273.15 K (0 °C, 32 °F, 491.67 °R) +
model numberAMD-X5-160 +
nameAMD-X5-160 +
process350 nm (0.35 μm, 3.5e-4 mm) +
processor p-ratingP75+ +
smp max ways1 +
technologyCMOS +
transistor count1,600,000 +
word size32 bit (4 octets, 8 nibbles) +