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Godson-2B1 - Loongson
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General Info
Model Number2B1
Introduction2004 (announced)
March, 2004 (launched)
General Specs
FamilyGodson 2
SeriesGodson 2
Frequency400 MHz
Core NameGS464
Process180 nm
Word Size64 bit
Max SMP1-Way (Uniprocessor)
Power dissipation4 W

Godson-2B1 (龙芯2B1) is a 64-bit MIPS performance processor developed by ICT and later Loongson for desktop computers. Introduced in early 2004, the Godson-2B1 operates at up to 400 MHz consuming up to 4 W. This chip was manufactured on SMICS' 0.18 µm process. This chip reached tapeout on March 7, 2004.

The Godson-2B1 is roughly twice the performance of the 2B.


Main article: GS464 § Cache

[Edit/Modify Cache Info]

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Cache Organization
Cache is a hardware component containing a relatively small and extremely fast memory designed to speed up the performance of a CPU by preparing ahead of time the data it needs to read from a relatively slower medium such as main memory.

The organization and amount of cache can have a large impact on the performance, power consumption, die size, and consequently cost of the IC.

Cache is specified by its size, number of sets, associativity, block size, sub-block size, and fetch and write-back policies.

Note: All units are in kibibytes and mebibytes.
L1$64 KiB
0.0625 MiB
65,536 B
6.103516e-5 GiB
L1I$32 KiB
0.0313 MiB
32,768 B
3.051758e-5 GiB
1x32 KiB  
L1D$32 KiB
0.0313 MiB
32,768 B
3.051758e-5 GiB
1x32 KiB  
Facts about "Godson-2B1 - Loongson"
base frequency400 MHz (0.4 GHz, 400,000 kHz) +
core count1 +
core nameGS464 +
designerLoongson +
familyGodson 2 +
first announced2004 +
first launchedMarch 2004 +
full page nameloongson/godson 2/2b1 +
instance ofmicroprocessor +
isaMIPS64 +
isa familyMIPS +
l1$ size0.0625 MiB (64 KiB, 65,536 B, 6.103516e-5 GiB) +
l1d$ size0.0313 MiB (32 KiB, 32,768 B, 3.051758e-5 GiB) +
l1i$ size0.0313 MiB (32 KiB, 32,768 B, 3.051758e-5 GiB) +
ldateMarch 2004 +
manufacturerSMICS +
market segmentDesktop +
max cpu count1 +
microarchitectureGS464 +
model number2B1 +
nameGodson-2B1 +
power dissipation4 W (4,000 mW, 0.00536 hp, 0.004 kW) +
process180 nm (0.18 μm, 1.8e-4 mm) +
seriesGodson 2 +
smp max ways1 +
technologyCMOS +
thread count1 +
word size64 bit (8 octets, 16 nibbles) +