Memtest v4.3.7: low bandwidth reported for DDR4?

80251 · Feb 23, 2023

My DDR4 is running at 3692Mhz., but even at 3200Mhz. and a single channel of memory the theoretical bandwidth should be 8 bytes*3.2 Ghz. = 25.6 GiB/s right? Memtest reports 9853 MiB/s!

ir_cow · Feb 23, 2023

Idk what memtest86 usually shows. Take a screenshot of CPUZ memory tab and try AIDA64 instead.

Also remember it's double data rate. Really DDR4-3200 is running at 1600 MHz.

80251 · Feb 23, 2023

But even if the DDR4 memory is running at 1600 Mhz. that's still 8 bytes * 1.6 Ghz. = 12.8 GiB/s for a single channel, for dual channel it would 25 GiB/s!

freeagent · Feb 23, 2023

It could just be the dataset the test is using. Maybe try something like TM5. I like the Anta777Extreme and Absolut profiles.

Processor	AMD R9 9900X @ booost
Motherboard	Asus Strix X670E-F
Cooling	Thermalright Phantom Spirit 120 EVO, 2x T30
Memory	2x 16GB Lexar Ares @ 6400 28-36-36-68 1.55v
Video Card(s)	Zotac 4070 Ti Trinity OC @ 3045/1500
Storage	WD SN850 1TB, SN850X 2TB, 2x SN770 1TB
Display(s)	LG 50UP7100
Case	Asus ProArt PA602
Audio Device(s)	JBL Bar 700
Power Supply	Seasonic Vertex GX-1000, Monster HDP1800
Mouse	Logitech G502 Hero
Keyboard	Logitech G213
VR HMD	Oculus 3
Software	Yes
Benchmark Scores	Yes

Memtest v4.3.7: low bandwidth reported for DDR4?

80251

ir_cow

80251

freeagent

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