Snapdragon 8cx - Qualcomm

	Edit Values
	Snapdragon 8cx
	General Info
Designer	Qualcomm,; ARM Holdings
Manufacturer	TSMC
Model Number	8cx
Market	Mobile
Introduction	December 6, 2018 (announced); Q3, 2019 (launched)
	General Specs
Family	Snapdragon 800
Series	800
Locked	No
Frequency	1,800 MHz, 2,840 MHz, 1,800 MHz, 3,020 MHz
Bus speed	100 MHz
Clock multiplier	28x
	Microarchitecture
ISA	ARMv8 (ARM)
Microarchitecture	Cortex-A76, Cortex-A55
Core Name	Kryo 495 Gold, Kryo 495 Silver
Process	7 nm
Technology	CMOS
Word Size	64 bit
Cores	8
Threads	8
	Multiprocessing
Max SMP	1-Way (Uniprocessor)
	Electrical
Vcore	0.5 V-0.95 V
TDP	7 W
	Packaging
	Succession
	Snapdragon 850

Snapdragon 8cx (Snapdragon 8 Compute eXtreme) is a high-performance 64-bit ARM LTE system on a chip designed by Qualcomm and introduced in late 2018. Fabricated on TSMC's 7nm process, the 8cx features four Kryo 495 Silver high-efficiency cores operating at 1.8 GHz along with four high-performance Kryo 495 Gold operating at 2.84 GHz. The Snapdragon 8cx integrates the Adreno 680 GPU operation at ? MHz and features an X24 LTE modem supporting Cat 20 uplink and Cat 20 downlink. This chip supports up to ? GiB of octa-channel LPDDR4X-4266 memory.

Overview[edit]

Block Diagram

The Snapdragon 8cx was announced by Qualcomm on December 6, 2018. The chip is what Qualcomm considers a new high tier Snapdragon aimed at always-connected PCs with higher performance and thermal headroom over traditional smartphone devices. The chip comprise of a quad-core cluster of Kryo 495 Gold (Cortex-A76) big cores and a quad-core cluster of Kryo 495 Silver (Cortex-A55) little cores.

Cache[edit]

Main articles: Cortex-A76 § Cache and Cortex-A55

[Edit/Modify Cache Info]

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.

L3$

10 MiB

10,240 KiB
10,485,760 B
0.00977 GiB

		1x10 MiB

Memory controller[edit]

[Edit/Modify Memory Info]

Integrated Memory Controller

Max Type	LPDDR4X-4266
Supports ECC	No
Max Mem	16 GiB
Frequency	2133 MHz
Controllers	1
Channels	8
Width	16 bit
Max Bandwidth	63.58 GiB/s 65,105.92 MiB/s 68.269 GB/s 68,268.505 MB/s 0.0621 TiB/s 0.0683 TB/s
Bandwidth	Single 7.95 GiB/s Double 15.89 GiB/s Quad 31.79 GiB/s Octa 63.58 GiB/s

SSD: NVME SSD
UFS: UFS 3.0

DSP[edit]

This chip features Qualcomm's Hexagon 685 DSP.

Graphics[edit]

[Edit/Modify IGP Info]

Integrated Graphics Information

GPU

Adreno 680 GPU

Designer

Qualcomm

Max Displays

2

Frequency

? MHz

"? MHz" is not a number.

Standards

DirectX	12
OpenCL	2.0
OpenGL ES	3.2
Vulkan	1.1

Codec Support: H.265 (HEVC), H.264 (AVC), VP9
Playback: Up 4K HDR decode at 120fps
Capture:
- 4K Video Capture for Ultra HD Premium Displays (4K@30fps)
- Slow Motion video capture (720p@480fps)

Camera[edit]

ISP
- Dual 14-bit ISPs
- Qualcomm Spectra 390 image signal processor
- Up to 16 MP dual camera
- Up to 32 MP single camera

Connectivity[edit]

X24 LTE modem
- LTE Category 20
- Downlink:
  - 2 Gbps peak
  - 7x20 MHz carrier aggregation
  - Up to 256-QAM
  - Up to 4x4 MIMO on five carriers
  - Full-Dimension MIMO (FD-MIMO)
  - Maximum 20 spatial streams
- Uplink:
  - 316 Mbps peak
  - 3x20 MHz carrier aggregation
  - Up to 2x 106Mbps LTE streams
  - Up to 256-QAM
  - Uplink data compression
LTE FDD, LTE TDD including CBRS support, LAA, LTE Broadcast, WCDMA (DB-DC-HSDPA, DC-HSUPA), TD-SCDMA, CDMA 1x, EV-DO, GSM/EDGE

WiFi
- Standards: 802.11ad, 802.11ac Wave 2, 802.11a/b/g, 802.11n
- Spectral Bands: 2.4 GHz, 5 GHz, 60 GHz
- MIMO Configuration: 2x2 (2-stream)

Bluetooth
- Bluetooth 5.0

Location[edit]

Systems: GPS, GLONASS, Beidou, Galileo, QZSS, SBAS

Utilizing devices[edit]

Galaxy Book S

Documents[edit]

Product Brief

back image	+
base frequency	1,800 MHz (1.8 GHz, 1,800,000 kHz) +, 2,840 MHz (2.84 GHz, 2,840,000 kHz) + and 3,020 MHz (3.02 GHz, 3,020,000 kHz) +
bus speed	100 MHz (0.1 GHz, 100,000 kHz) +
core count	8 +
core name	Kryo 495 Gold + and Kryo 495 Silver +
core voltage (max)	0.95 V (9.5 dV, 95 cV, 950 mV) +
core voltage (min)	0.5 V (5 dV, 50 cV, 500 mV) +
designer	Qualcomm + and ARM Holdings +
dsp	Hexagon 685 DSP +
family	Snapdragon 800 +
first announced	December 6, 2018 +
first launched	March 2019 +
full page name	qualcomm/snapdragon 800/8cx +
has ecc memory support	false +
has locked clock multiplier	false +
instance of	microprocessor +
integrated gpu	Adreno 680 GPU +
integrated gpu designer	Qualcomm +
isa	ARMv8 +
isa family	ARM +
l3$ size	10 MiB (10,240 KiB, 10,485,760 B, 0.00977 GiB) +
ldate	3000 +
main image	+
manufacturer	TSMC +
market segment	Mobile +
max cpu count	1 +
max memory bandwidth	63.58 GiB/s (65,105.92 MiB/s, 68.269 GB/s, 68,268.505 MB/s, 0.0621 TiB/s, 0.0683 TB/s) +
max memory channels	8 +
microarchitecture	Cortex-A76 + and Cortex-A55 +
model number	8cx +
name	Snapdragon 8cx +
process	7 nm (0.007 μm, 7.0e-6 mm) +
series	800 +
smp max ways	1 +
supported memory type	LPDDR4X-4266 +
tdp	7 W (7,000 mW, 0.00939 hp, 0.007 kW) +
technology	CMOS +
thread count	8 +
used by	Galaxy Book S +
word size	64 bit (8 octets, 16 nibbles) +

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