Kingston Fury DDR5 Beast RGB (KF556C40BBAK2-64) review: how much RAM do you need to be happy

Recently, there has been a very interesting parity in which the amount of RAM has almost equalized, both on the recommended “Budget PCs” and on advanced ones. In most cases, 32 Gigabytes of RAM is enough for ordinary users, but for serious PC enthusiasts and those who make their living with resource-intensive projects, it’s clearly not enough. That’s why Kingston Fury DDR5 Beast RGB (KF556C40BBAK2-64) with a capacity of 64 Gigabytes arrived for our editorial review. Using it as an example, we will find out how much RAM a modern PC needs for complete comfort.

Specifications Kingston Fury DDR5 Beast RGB (KF556C40BBAK2-64)

Memory type	DDR5
Form factor	DIMM
Number of modules in the set	2
Memory capacity of one module	32 GB
Total storage capacity of the kit	64 GB
Module configuration	4G x 64 (2-way)
Default mode of operation	DDR5-4800 CL40-39-39 @1.1V
Advanced Intel XMP profiles	DDR5-5200 CL40-40-40 @1.25V DDR5-5600 CL40-40-40 @1.25V
Advanced AMD EXPO profiles	DDR5-5200 CL40-40-40 @1.25V DDR5-5600 CL40-40-40 @1.25V
Operating temperature, °C	0-85
Timings	CL40
Supply voltage, V	1,25
Detailed specifications	Fury Beast RGB
Backlighting technologies	ASRock Polychrome Sync, Asus Aura Sync, Gigabyte RGB Fusion, MSI Mystic Light
Dimensions, mm	133.35 x 42.23 x 7.11

Package and packaging

The Kingston Fury DDR5 Beast RGB memory kit (KF556C40BBAK2-64) arrived for editorial review in a classic transparent blister pack. This is quite enough to avoid transportation problems and the bad mood of the packers at the delivery service.

All the necessary technical information is contained on the back on a special sticker that holds this improvised sandwich together. On the front side, the manufacturer emphasizes the support of automatic profiles — AMD EXPO and intel XMP 3.0, as well as the ability to synchronize RGB backlighting with major motherboard brands.

The equipment here is minimal — except for the memory modules themselves Kingston Fury DDR5 Beast RGB (KF556C40BBAK2-64) can only be found in the paper documentation. I don’t know why, but there was no place for a branded sticker, which is usually also included in the blister

Design and features of Kingston Fury DDR5 Beast RGB (KF556C40BBAK2-64)

The black color of the memory will fit into the gamut of most motherboards. It seems that manufacturers have already tried all the design options during the existence of DIMM RAM, so it’s not easy to come up with something new. But the popularization of RGB backlighting, which turns RAM into a separate element of the desktop interior, helped a lot.

The memory is covered with black radiators with an interesting “angular” pattern. On the left side there is an inscription Kingston in small letters, and below it is a solidly highlighted inscription —  Fury.

The upper edges of Kingston Fury DDR5 Beast RGB (KF556C40BBAK2-64) are translucent, because the RGB backlight is hidden under them. It is bright, saturated and immediately attracts attention. The glow is uniform and, of course, can be flexibly adjusted using the proprietary utility Kingston FURY CTRL.

If you don’t want to install any additional software, there’s nothing stopping you from using the proprietary software that comes with your motherboard (MSI, ASUS, ASRock, GIGABYTE). 

On the back of the RAM, you can find the classic sticker with detailed information, including a QR code, labeling, and operating voltage — 1.25 V, which is typical for 2800 MHz.

The height of the modules is 42.23 mm and some of it is added by RGB backlight elements. Therefore, there are no problems when installing Kingston Fury DDR5 Beast RGB (KF556C40BBAK2-64) should not be an issue in the vast majority of cases.

Test bench

For testing Kingston Fury DDR5 Beast RGB (KF556C40BBAK2-64) We have assembled a system that belongs to the top configuration of the modern progressive PC according to the ITC classification. Measurements were made on the Windows 11 24H2 ver. 26100.4061. The case was made of Cougar FV270 RGB WHITE from CompX in a special version — ANNIHILATION. Test bench configuration:

• Body Cougar FV270 RGB WHITE;
• Motherboard ASRock X870E Taichi;
• Processor AMD Ryzen 7 9800X3D;
• Cooling MSI MAG CORELIQUID A15 360;
• Drive Kingston FURY Renegade 3D NAND TLC 4TB;
• RAM Kingston Fury DDR5 Beast RGB (KF556C40BBAK2-64);
• Power supply MSI MPG GS 850W;
• Video card #1 Gigabyte Radeon RX 9070 XT AORUS ELITE;
• Video card #2 Gigabyte GeForce RTX 5080 GAMING OC 16G;
• Monitor Acer Predator XB273UV3bmiiprx.

Performance and tests

Let’s start our testing with synthetic benchmarks. AIDA 64 is classically sensitive to memory frequency and timings.

By default, the memory cannot boast of low latency (102 ms) with the standard DDR5-4800 CL40-39-39 @1.1V profile. In this mode, the read speed is about 55,799 points, the write speed 61531 and copying 50542 points.

AIDA 64	4800 MHz	5600 MHz	5800 MHz	6000 MHz
Read	55799	57047	57316	57591
Write	61531	72240	73686	76670
Copy	50542	54188	54541	53999
Latency	102	98	92,8	93,4

By choosing the maximum profile available — AMD EXPO 5600 MHz CL40-40-40 @1.25V, the reading speed increases up to 57047 points, and the entry to the 72 240. The copy speed increases by +9%. The latency is mediocre — 98 ns. However, the memory can be overclocked.

At 6000 MHz, you can already see the difference in performance (especially in read mode) compared to the standard DDR5-4800 mode. The increase in this case is approximately +25%. However, other indicators cannot boast of such a significant boost: the read speed increases by only +3.2%, and the copy speed increases by almost 7%.In this case, the latency decreases by about +8.5%. An interesting fact is that this memory shows the lowest latency if you leave only one module in a single channel. Then it is 87 ns at 6000 MHz.

Single mode in Geekbench 6 does not show a significant increase in overclocking the RAM: +1.6% is clearly not the result you expect after raising the frequency. But in Multi mode we have +6.6%, which is much better.

GeekBench AI	4800 MHz	5800 MHz	6000 MHz
Single Precision Score	7787	7843	7540
Half Precison Score	2707	2760	2705
Quantized Score	12595	12883	12588

7-zip test	4800 MHz	5600 MHz	5800 MHz	6000 MHz
Compression	117,4	123,2	127,2	128,7
Decompression	136,4	136,9	136,8	138,6
Total	126,93	130,1	133	133,6

To summarize, we can see that a moderate overclock from DDR5-4800 to DDR5-6000 MHz does not add such a significant impact that could be seen with the naked eye.

As for games, they also turned out to be not very dependent on raising the base frequencies. The most sensitive was S.T.A.L.K.E.R. 2. In 4K mode on epic settings (DLSS + FG), the increase from the frequency increase is +3.7%. In QuadHD, the boost is +3.5%, almost the same as in FullHD

During the stress test, the temperature in DDR5-4800 mode reached 46 degrees Celsius and 48.5 degrees Celsius with DDR5-6000. Samsung’s memory modules perform well even with small heatsinks. It’s up to you whether you want to overclock your RAM or stick with the built-in XMP/AMD Expo profiles. As for me, it’s enough to limit yourself to the built-in profiles.

Experience of use, or how much memory does a PC enthusiast need?

Back in 1981, Bill Gates said that 640 KB was enough for everyone. Although he has repeatedly stated that he did not say that. But I would like to point out that in 2025, 32 GB is no longer enough if you use your PC or laptop not only for gaming but also for resource-intensive work.

I usually use 32 gigabytes of memory in my test bench. It would seem that this should be enough for all occasions. But practice shows that even this amount is no longer enough if you don’t want to shut down a browser with many tabs every time you play a demanding game.

I often like to experiment with offline neurons. If I have Fooocus running, it has happened that I have been thrown out of some games at some stage. Let’s try to check how much power modern games consume in the most difficult operating modes.

The Game	Mode	RAM, GB
S.T.A.L.K.E.R. 2	4K, Epic, DLSS + FG – ON	21,18
	QuadHD, Epic, DLSS – OFF + FG – ON	21,36
	FullHD, Epic, DLSS – OFF + FG – ON	20,61
Indiana Jones and the Great Circle	4K, Ultra, DLSS – Quality, FG – x4, Path Tracing – ON	17,61
	QuadHD, Ultra, DLSS – Quality, FG – x4, Path Tracing – OFF	17,75
	FullHD, Ultra, DLSS – QUALITY, FG – ON, Path Tracing – OFF	17,74
Cyberpunk 2077	4K, Ultra, DLSS, FG — 4x, RT – ON	18,4
	QuadHD, Ultra, DLSS — 4x, FG – ON, PT – ON	18,47
	FullHD, Ultra, DLSS — 4x, FG – ON, PT – ON	18,42
Avowed	4K, Epic, DLSS + FG (x4), RT (ON)	19,9
	QuadHD, Epic, DLSS + FG (x4), RT (ON)	19,8
	FullHD, Epic, DLSS + FG (x4), RT (ON)	19,5
The Elder Scrolls IV: Oblivion	4K, Ultra, DLSS + FG (x4) – ON + RT High	22,56
	QuadHD, Ultra, DLSS + FG (x4) – ON + RT High	22,63
	FullHD, Ultra, DLSS + FG (x4) – ON + RT High	21,88
Clair Obscur: Expedition 33	4K, Epic, DLSS – ON	16,6
	QuadHD, Epic, DLSS – ON	15,52
	FullHD, Epic, DLSS – ON	16,47
Remant 2	4K, DLSS + FG – ON	19,93
	QuadHD, DLSS + FG – ON	19,9
	FullHD, DLSS + FG – ON	19,82

Tests have shown that regardless of whether you’re playing in FullHD, QuadHD, or 4K — you’ll need almost the same amount of memory. This is not surprising, since the GPU video memory plays the main role here

For the sake of example, the screenshot shows my typical workflow: an open offline image generator, Photoshop, about 20 tabs in chrome, Excel, and all the things that usually load in the background. As a result — 38 GB of RAM is already occupied. And this is still a fairly moderate scenario, because sometimes several virtualizations are added to it

Price and competitors

Kingston Fury DDR5 Beast RGB RAM (KF556C40BBAK2-64) can be purchased at a price starting at 8,487 UAH. For this price, you can find a large number of competitive solutions for every taste.

If the frequency range is not essential for you, you can look in the direction of Corsair Vengeance DDR5 2x32Gb. It offers 5200 MHz, as well as a lower height, since there is no RGB backlight. For some people, this will be a plus, it all depends on specific preferences.

G.Skill Trident Z5 RGB DDR5 2x32Gb— a solution for those who value high frequencies (6000 MHz) and low timings (CL36) right out of the box. The weight of these memory modules is almost a third higher than Kingston Fury DDR5 Beast RGB (KF556C40BBAK2-64). Also, despite the seemingly better radiators, the temperature is also two to three degrees Celsius higher, although this is still good performance.

And fans of the old school and low timing will also like it GOODRAM IRDM DDR5 2x32Gb which also lacks RGB lighting. It boasts the lowest height to fit even if you have little space in your case or if the elements of a tower cooler are in the way