On 10/10/26 at 20:54, Felix Miata wrote:
Given the manual for that motherboard claims standard support for up to 1866,
and
the modules the same 1866, I wouldn't settle for less than 1600 forced via BIOS
setup. The slowest speed claimed supported is 1066, much better than 933.
However, if you have a 100 series CPU, then according to the manual, the fastest
supported is 1333. If this is the case, you can probably find and install a
better
CPU used and realize a lot better performance both from RAM and CPU.
I tried dmidecode instead of inxi:
~# dmidecode -t memory | grep -E "Bank|Speed"
Bank Locator: BANK0
Speed: 1866 MT/s
Configured Memory Speed: 933 MT/s
Bank Locator: BANK1
Speed: 1866 MT/s
Configured Memory Speed: 933 MT/s
Bank Locator: BANK2
Speed: 1866 MT/s
Configured Memory Speed: 933 MT/s
Bank Locator: BANK3
Speed: 1866 MT/s
Configured Memory Speed: 933 MT/s
then I asked to the Google AI/LLM tool : "Why the configured memory
speed is 933 MT/s?" it gave this answer:
(begin)
The memory module is actually running at its exact correct speed. Seeing
933 MHz (sometimes labeled as MT/s in software) is a normal
characteristic of DDR (Double Data Rate) technology.
The technical breakdown of this behavior is as follows:
| Concept | Actual Value | Description |
| Real Clock Frequency | 933.33 MHz | This is the actual physical
operating frequency of the memory bus. |
| DDR Technology | 2 transfers per cycle | Double Data Rate transfers
data on both the rising and falling edges of the clock signal. |
| Effective Transfer Rate | 1866 MT/s | Multiplying the real clock
frequency by two (933.33 MHz × 2) gives the module's rated 1866 Mega
Transfers per second. |
## Why do you see this number?
Monitoring software like CPU-Z (under the Memory tab as DRAM Frequency)
or certain OS utilities display the real clock frequency (933 MHz)
instead of the effective marketing speed (1866).
If your software displays ~933 MHz, it means your Intel XMP profile is
correctly enabled in the BIOS and your RAM is performing exactly as
intended. If XMP were disabled, this frequency would drop to 800 MHz
(DDR3-1600) or 667 MHz (DDR3-1333).
(end)
That makes me wonder, if it is true then everybody that has DDR RAM
should see in dmidecode half speed at the "Configured Memory Speed:"
field and it would be a well known hardware behavior. Could anybody
verify this by running:
~# dmidecode -t memory | grep -E "Bank|Speed"
on its PC? Apologies if I asked to an LLM tool I prefer to talk with
humans instead of machines but since it was available...
--
Franco Martelli
