The Kingston FURY Beast RGB KF556C40BBAK4-128 is a high-capacity DDR5 desktop memory kit designed for compatible systems requiring 128GB of system memory. The kit contains four 32GB modules, each rated for 5600MT/s with CL40-40-40 timings at 1.25V.
Combining DDR5 performance with black heat spreaders and customizable RGB lighting, this Kingston FURY Beast kit is suitable for powerful desktop builds, demanding multitasking, content creation and other memory-intensive workloads. Intel XMP 3.0 support allows compatible systems to apply predefined memory performance profiles through the motherboard BIOS.
Key Features
- 128GB total capacity: Four 32GB DDR5 memory modules provide substantial memory capacity for demanding desktop workloads.
- DDR5-5600 performance: Rated for 5600MT/s with tested timings of CL40-40-40 at 1.25V.
- Intel XMP 3.0 support: Predefined memory profiles simplify configuration on compatible platforms.
- Customizable RGB lighting: Integrated RGB illumination adds visual customization to compatible desktop builds.
- Black heat spreaders: A distinctive design with a 42.23mm module height, including the heat spreader.
High-Capacity DDR5 Memory
With 128GB distributed across four 32GB modules, this kit provides substantial memory capacity for compatible desktop systems. It can support demanding multitasking, professional applications, content creation and other workloads that benefit from additional system memory.
Actual application performance depends on the processor, motherboard, BIOS, software and overall system configuration. Before installing a four-module kit, confirm that the motherboard and processor support the intended memory capacity and configuration.
DDR5-5600 Speed and CL40 Timings
The Kingston FURY Beast RGB kit is tested for DDR5-5600 operation with timings of 40-40-40 at 1.25V. It also includes a standard JEDEC DDR5-4800 profile, allowing the system to operate at supported default memory settings.
The rated 5600MT/s profile may require enabling Intel XMP in the motherboard BIOS. The final operating speed depends on processor memory support, motherboard capabilities, BIOS configuration and the number of installed modules.
Intel XMP 3.0 Support
Intel Extreme Memory Profile (XMP) 3.0 provides predefined memory settings that can be selected on compatible systems. This kit includes profiles for DDR5-5600, DDR5-5200 and DDR5-4800 operation.
Memory profiles are optional configuration settings. Check the motherboard manufacturer's documentation for instructions and compatibility information before enabling a profile.
RGB Lighting and Black Heat Spreaders
The Kingston FURY Beast RGB features integrated RGB lighting and black heat spreaders to complement a range of desktop PC designs. Lighting effects can be customized using Kingston FURY CTRL or supported motherboard RGB software. Available synchronization and control options depend on the hardware and software in use.
Each module measures 42.23mm in height, including its heat spreader. Check clearance around the CPU cooler and other components before installation.
Technical Specifications
| Brand | Kingston |
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| Product Family | Kingston FURY Beast RGB |
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| Part Number | KF556C40BBAK4-128 |
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| Total Capacity | 128GB |
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| Kit Configuration | 4 x 32GB |
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| Memory Type | DDR5 SDRAM |
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| Rated Data Transfer Speed | 5600MT/s |
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| Tested Timings | CL40-40-40 |
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| Tested Voltage | 1.25V |
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| Default JEDEC Profile | DDR5-4800 CL40-39-39 at 1.1V |
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| XMP Profile 1 | DDR5-5600 CL40-40-40 at 1.25V |
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| XMP Profile 2 | DDR5-5200 CL40-40-40 at 1.25V |
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| XMP Profile 3 | DDR5-4800 CL38-38-38 at 1.1V |
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| Form Factor | 288-pin DIMM |
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| Module Organization | 2Rx8 per module |
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| DRAM Component Density | 16Gbit |
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| Registered / Buffered | Unbuffered |
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| System Memory ECC | Non-ECC system memory with on-die ECC |
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| RGB Lighting | Yes |
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| Heat Spreader Colour | Black |
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| Module Height | 42.23mm, including heat spreader |
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| Operating Temperature | 0°C to 85°C |
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Compatibility and Installation Notes
This kit is intended for desktop motherboards with compatible DDR5 DIMM slots. It is not compatible with DDR4-only motherboards or laptop memory slots designed for SO-DIMM modules.
Because this is a four-module, 128GB kit, check the motherboard's maximum supported memory capacity, supported DIMM configurations and memory compatibility list before purchasing. Maximum supported memory speed can vary with the processor, motherboard, BIOS and number of populated memory slots.
The standard JEDEC profile is DDR5-4800. Achieving the rated 5600MT/s speed may require enabling the appropriate XMP profile in the BIOS. On-die ECC is a feature of DDR5 memory chips and does not make this a registered ECC server-memory kit.
Frequently Asked Questions
1. How much memory does this kit provide?
The kit contains four 32GB DDR5 modules, providing a combined capacity of 128GB.
2. What is the rated memory speed?
The kit is rated for 5600MT/s with tested timings of CL40-40-40 at 1.25V.
3. Does this kit support Intel XMP 3.0?
Yes. It supports Intel XMP 3.0 profiles for compatible systems. The achievable speed depends on the processor, motherboard, BIOS and installed memory configuration.
4. Is this memory compatible with DDR4 motherboards?
No. This is DDR5 memory with a 288-pin desktop DIMM form factor. It requires a compatible motherboard with DDR5 memory slots.
5. Does the kit include RGB lighting?
Yes. The modules feature integrated RGB lighting that can be customized using Kingston FURY CTRL or supported motherboard lighting software.
6. Is this registered ECC memory?
No. This kit is specified as non-ECC, unbuffered desktop memory with on-die ECC technology integrated into the DDR5 memory chips.
