G.SKILL Flare X5 32GB (2 x 16GB) DDR5 6400 RAM

G.SKILL Flare X5 32GB (2 x 16GB) DDR5 6400 F5-6400J3240G16GX2-FX5

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G.SKILL Flare X5 32GB (2 x 16GB) 288-Pin PC RAM DDR5 6400 (PC5 51200) Desktop Memory Model F5-6400J3240G16GX2-FX5 CAS Latency: 32 Voltage: 1.40V Timing: 32-40-40-40-102 Recommend Use: Optimized for AMD Ryzen 9000 series processors Buffered/Registered: Unbuffered / Unregistered Heat Spreader: Yes Features: Flare X5 series is a low-profile DDR5 memory designed for high performance on compatible DDR5-enabled AMD platforms, and supports AMD EXPO overclocking profiles to enable easy memory overclocking by simply enabling the EXPO profile in the BIOS with a compatible motherboard and processor. Featuring a 33mm low-profile height and built with hand-screened IC chips, the Flare X5 is an excellent choice for compact performance PC builds. • Optimized for AMD Ryzen 9000 series processors or later • 33mm Low-profile module height design • AMD EXPO Support • Do not mix memory kits.

G.SKILL Flare X5 32GB (2 x 16GB) DDR5 6400 image 1

Specifications Overview

Model	F5-6400J3240G16GX2-FX5
Type	288-pin DDR5 DIMM
Speed	DDR5-6400 MHz
Size	32GB (2 x 16GB)
CAS Latency	32
Timing	32-40-40-102
First Word Latency	10 ns
Voltage	1.4 V
Heat Spreader	Yes
ECC Support	No
Color	Black

	Old Name	Current Name	Branding	Data Speed	Port
USB 2.0	USB 2.0	USB 2.0	Hi-Speed USB	480 Mbit/s	diverse
USB 3.0	USB 3.1 Gen 1	USB 3.2 Gen 1x1	SuperSpeed USB	5 Gbit/s	diverse
USB 3.1	USB 3.1 Gen 2	USB 3.2 Gen 2x1	SuperSpeed USB 10Gbps	10 Gbit/s	diverse
USB 3.2	USB 3.2 Gen 2x2	USB 4.0 Gen 2x2	USB4 20Gbps	20 Gbit/s	only USB-C
USB4	USB 4.0 Gen 3x2	USB4 1.0	USB4 40Gbps	40 Gbit/s	only USB-C
USB4v2	USB 4.0 Gen 4	USB4 2.0	USB4 80Gbps	80-120 Gbit/s	only USB-C

RAM First Word Latency Table (nanoseconds)

Latency is measured in nanoseconds, which is a combination of frequency and CAS. Both frequency increases and latency decreases result in better system performance (when latency is the same, always prefer higher frequency if possible).

Frequency (MT/s)

	4400	4800	5000	5200	5600	6000	6200	6400	6600	6800	7000	7200	7400	7600
32	14.55	13.33	12.80	12.31	11.43	10.67	10.32	10.00	9.70	9.41	9.14	8.89	8.65	8.42
33	15.00	13.75	13.20	12.69	11.79	11.00	10.65	10.31	10.00	9.71	9.43	9.17	8.92	8.68
34	15.45	14.17	13.60	13.08	12.14	11.33	10.97	10.63	10.30	10.00	9.71	9.44	9.19	8.95
35	15.91	14.58	14.00	13.46	12.50	11.67	11.29	10.94	10.61	10.29	10.00	9.72	9.46	9.21
36	16.36	15.00	14.40	13.85	12.86	12.00	11.61	11.25	10.91	10.59	10.29	10.00	9.73	9.47
37	16.82	15.42	14.80	14.23	13.21	12.33	11.94	11.56	11.21	10.88	10.57	10.28	10.00	9.74
38	17.27	15.83	15.20	14.62	13.57	12.67	12.26	11.88	11.52	11.18	10.86	10.56	10.27	10.00
39	17.73	16.25	15.60	15.00	13.93	13.00	12.58	12.19	11.82	11.47	11.14	10.83	10.54	10.26
40	18.18	16.67	16.00	15.38	14.29	13.33	12.90	12.50	12.12	11.76	11.43	11.11	10.81	10.53
41	18.64	17.08	16.40	15.77	14.64	13.67	13.23	12.81	12.42	12.06	11.71	11.39	11.08	10.79
42	19.09	17.50	16.80	16.15	15.00	14.00	13.55	13.13	12.73	12.35	12.00	11.67	11.35	11.05
43	19.55	17.92	17.20	16.54	15.36	14.33	13.87	13.44	13.03	12.65	12.29	11.94	11.62	11.32
44	20.00	18.33	17.60	16.92	15.71	14.67	14.19	13.75	13.33	12.94	12.57	12.22	11.89	11.58
45	20.45	18.75	18.00	17.31	16.07	15.00	14.52	14.06	13.64	13.24	12.86	12.50	12.16	11.84
46	20.91	19.17	18.40	17.69	16.43	15.33	14.84	14.38	13.94	13.53	13.14	12.78	12.43	12.11
47	21.36	19.58	18.80	18.08	16.79	15.67	15.16	14.69	14.24	13.82	13.43	13.06	12.70	12.37
48	21.82	20.00	19.20	18.46	17.14	16.00	15.48	15.00	14.55	14.12	13.71	13.33	12.97	12.63
49	22.27	20.42	19.60	18.85	17.50	16.33	15.81	15.31	14.85	14.41	14.00	13.61	13.24	12.89
50	22.73	20.83	20.00	19.23	17.86	16.67	16.13	15.63	15.15	14.71	14.29	13.89	13.51	13.16
51	23.18	21.25	20.40	19.62	18.21	17.00	16.45	15.94	15.45	15.00	14.57	14.17	13.78	13.42
52	23.64	21.67	20.80	20.00	18.57	17.33	16.77	16.25	15.76	15.29	14.86	14.44	14.05	13.68

CAS (clock cycles) Lower latency means faster memory.

Distribution of First Word Latencies for Similar RAM Modules

The histogram below shows the distribution of first word latencies (in nanoseconds) for all RAM modules of the same DDR type and frequency in our database. Each bar represents the number of modules that fall within a specific latency range. The highlighted bar indicates the latency of the currently selected RAM module.