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Godson-2E - Loongson
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Godson-2E chip
General Info
Model Number2E
Part NumberCZ70
Introduction2006 (announced)
March 18, 2006 (launched)
General Specs
FamilyGodson 2
SeriesGodson 2
Frequency1,000 MHz
Bus typeSysAD
Core NameGS464
Process90 nm
Die36 mm²
Word Size64 bit
Max CPUs1 (Uniprocessor)
Power dissipation7 W
Vcore1.2 V

Godson-2E (龙芯2E) is a 64-bit MIPS performance processor developed by ICT and later Loongson for desktop computers. Introduced in early 2006, the Godson-2E operates at up to 1 GHz consuming 7W. This chip was manufactured on STMicroelectronics' 90 nm process and provides roughly three times the performance of 2C. This processor is known as China's first processor to reach gigahertz frequency.

The Godson-2E introduces a number of improvements over its predecessor, including double the clock frequency, the addition of a large L2 cache, and the integration of the northbridge on-die, supporting up to DDR-333.


Main article: GS464 § Cache

[Edit/Modify Cache Info]

hierarchy icon.svg
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$128 KiB
0.125 MiB
131,072 B
1.220703e-4 GiB
L1I$64 KiB
0.0625 MiB
65,536 B
6.103516e-5 GiB
1x64 KiB4-way set associative 
L1D$64 KiB
0.0625 MiB
65,536 B
6.103516e-5 GiB
1x64 KiB4-way set associative 

L2$512 KiB
0.5 MiB
524,288 B
4.882812e-4 GiB
  1x512 KiB4-way set associative 

Memory controller[edit]

[Edit/Modify Memory Info]

ram icons.svg
Integrated Memory Controller
Max TypeDDR-333
Supports ECCYes
Max Mem2 GiB
Max Bandwidth4.967 GiB/s
Single 4.967 GiB/s


This chip had no integrated graphics processing unit.

Die Shot[edit]

godson-2e die shot.png


  • Hu, Wei-Wu, and Jian Wang. "Making effective decisions in computer architects’ real-world: Lessons and experiences with Godson-2 processor designs." Journal of Computer Science and Technology 23.4 (2008): 620-632.
Facts about "Godson-2E - Loongson"
base frequency1,000 MHz (1 GHz, 1,000,000 kHz) +
bus typeSysAD +
core count1 +
core nameGS464 +
core voltage1.2 V (12 dV, 120 cV, 1,200 mV) +
designerLoongson +
die area36 mm² (0.0558 in², 0.36 cm², 36,000,000 µm²) +
familyGodson 2 +
first announced2006 +
first launchedMarch 18, 2006 +
full page nameloongson/godson 2/2e +
has ecc memory supporttrue +
instance ofmicroprocessor +
isaMIPS64 +
isa familyMIPS +
l1$ size0.125 MiB (128 KiB, 131,072 B, 1.220703e-4 GiB) +
l1d$ description4-way set associative +
l1d$ size0.0625 MiB (64 KiB, 65,536 B, 6.103516e-5 GiB) +
l1i$ description4-way set associative +
l1i$ size0.0625 MiB (64 KiB, 65,536 B, 6.103516e-5 GiB) +
l2$ description4-way set associative +
l2$ size0.5 MiB (512 KiB, 524,288 B, 4.882812e-4 GiB) +
ldateMarch 18, 2006 +
main imageFile:godson-2e.jpg +
main image captionGodson-2E chip +
manufacturerSTMicroelectronics +
market segmentDesktop +
max cpu count1 +
microarchitectureGS464 +
model number2E +
nameGodson-2E +
part numberCZ70 +
power dissipation7 W (7,000 mW, 0.00939 hp, 0.007 kW) +
process90 nm (0.09 μm, 9.0e-5 mm) +
seriesGodson 2 +
supported memory typeDDR-333 +
technologyCMOS +
thread count1 +
transistor count47,000,000 +
word size64 bit (8 octets, 16 nibbles) +