On 10/10/26 at 10:58, didier gaumet wrote:
Le 09/10/2026 à 15:26, Franco Martelli a écrit :
[...]
Device-1: DIMM0 type: DDR3 size: 4 GiB speed: spec: 1866 MT/s
actual: 933 MT/s
[...]
is it possible to set "actual:" from 933 MT/s to 1866 MT/s? Why it is
933 MT/s?
The motherboard is:
(...]
ASUSTeK model: M5A99X EVO R2.0 v: Rev 1.xx
[...]
The filename of the PDF handbook is "E8044_M5A99X_EVO_R2.PDF"[...]
Hello,
Hi,
Said handbook indicates
- (https://dlcdnta.asus.com/pub/ASUS/mb/SocketAM3+/M5A99X_EVO_R2.0/
E8044_M5A99X_EVO_R20_V2_WEB.pdf?
model=M5A99X%20EVO%20R2.0&Signature=qt~nADGbp8ApS7WsiMp9F7sIjdKAj~LiAUVqVum-sLLiF81WMHV724pbo4cEYQcNxZPxlUF~cjJ6EJy0teDv~cRk6lf~cEgvZ395DpT3annTqO6sKHuWYbJqdRKmJ9RDSTTwTOoxwhkeDHy79YDzzjdaIzf4tYAOwe9JGNdkJYSFY1m8wFszQFE9UkJjIekE81st4tTUaHoyYu169Jzl8i8p8dQDHKh9~Q88QNnKzk866t-LTwGBslxpGqv5YzbcVtia7qQ~TImTfRyrLo5I9SzfCGeIb3jU7zt2O5upzjL6qmaspgJ4dwTmBEA703F9yr3dxFLQBOfATnYA7I8w4A__&Expires=1791622219&Key-Pair-Id=K2ITB7O97XKKCX):
"[...] The default memory operation frequency is dependent on its Serial
Presence Detect (SPD), which is the standard way of accessing
information from a memory module. Under the default state, some memory
modules for overclocking may operate at a lower frequency than the
vendor-marked value. To operate at the vendor-marked or at a higher
frequency, refer to section 3.4 Ai Tweaker menu for manual memory
frequency adjustment [...]"
- (https://dlcdnta.asus.com/pub/ASUS/mb/SocketAM3+/M5A99X_EVO_R2.0/
E8044_M5A99X_EVO_R20_V2_WEB.pdf?
model=M5A99X%20EVO%20R2.0&Signature=qt~nADGbp8ApS7WsiMp9F7sIjdKAj~LiAUVqVum-sLLiF81WMHV724pbo4cEYQcNxZPxlUF~cjJ6EJy0teDv~cRk6lf~cEgvZ395DpT3annTqO6sKHuWYbJqdRKmJ9RDSTTwTOoxwhkeDHy79YDzzjdaIzf4tYAOwe9JGNdkJYSFY1m8wFszQFE9UkJjIekE81st4tTUaHoyYu169Jzl8i8p8dQDHKh9~Q88QNnKzk866t-LTwGBslxpGqv5YzbcVtia7qQ~TImTfRyrLo5I9SzfCGeIb3jU7zt2O5upzjL6qmaspgJ4dwTmBEA703F9yr3dxFLQBOfATnYA7I8w4A__&Expires=1791622219&Key-Pair-Id=K2ITB7O97XKKCX):
"[...] Memory Frequency [Auto] Allows you to set the memory operating
frequency. Configuration options: [Auto] [DDR3-800MHz] [DDR3-1066MHz]
[DDR3-1333MHz] [DDR3-1600MHz] [DDR3-1866MHz] [DDR3-2133MHz]
[DDR3-2400MHz] [...]"
So what is your present value of this setup?
If it's [Auto], try to set it up manually to [DDR3-1866]
Screenshots from the BIOS:
https://i.is.cc/sJr9KtI.jpg
https://i.is.cc/sJyIP5Q.jpg
https://i.is.cc/sM75OwT.jpg
https://i.is.cc/sM9I00N.jpg
Output of backported to Trixie version of "inxi" with "dmidecode" installed:
~# inxi -ma --vs --za
inxi 3.3.41-00 (2026-07-01)
Memory:
System RAM: total: 16 GiB available: 15.38 GiB used: 2.23 GiB (14.5%)
Array-1: capacity: 32 GiB slots: 4 modules: 4 EC: None
max-module-size: 8 GiB note: est.
Device-1: DIMM0 type: DDR3 detail: synchronous unbuffered (unregistered)
size: 4 GiB speed: spec: 1866 MT/s actual: 933 MT/s volts: N/A
width (bits):
data: 64 total: 64 manufacturer: N/A part-no: F3-14900CL9-4GBSR
serial: N/A
Device-2: DIMM1 type: DDR3 detail: synchronous unbuffered (unregistered)
size: 4 GiB speed: spec: 1866 MT/s actual: 933 MT/s volts: N/A
width (bits):
data: 64 total: 64 manufacturer: N/A part-no: F3-14900CL9-4GBSR
serial: N/A
Device-3: DIMM2 type: DDR3 detail: synchronous unbuffered (unregistered)
size: 4 GiB speed: spec: 1866 MT/s actual: 933 MT/s volts: N/A
width (bits):
data: 64 total: 64 manufacturer: N/A part-no: F3-14900CL9-4GBSR
serial: N/A
Device-4: DIMM3 type: DDR3 detail: synchronous unbuffered (unregistered)
size: 4 GiB speed: spec: 1866 MT/s actual: 933 MT/s volts: N/A
width (bits):
data: 64 total: 64 manufacturer: N/A part-no: F3-14900CL9-4GBSR
serial: N/A
I guess that the cause is the "Energy Saving Mode" profile enabled in
the BIOS (available are "Normal" and "Performance" modes) in addiction
to the EPU dip switch ON in the motherboard.
It also seems strange to me that "inxi" tells "EC: None" while "ECC
Mode" is enabled in the BIOS (see screenshots).
However I don't want to risk anything (memory instability) I'll stay
with 933 MHz that seems the right value as reported by the G.Skill
support service in this message:
https://forums.tomshardware.com/threads/asus-m5a99x-evo-r2-0-ram-configuration.3495151/post-21126911
Thanks, kind regards,
--
Franco Martelli
