Performance remains constrained even with EXPO enabled.
Performance remains constrained even with EXPO enabled.
Bonjour, j’ai installé un kit de RAM Corsair compatible sur une carte mère ASRock X670E Steel Legend qui prend en charge jusqu’à 7600 MHz. Malgré l’activation du profil EXPO, la mémoire reste bloquée à 4800 MHz au lieu des 6000 MHz attendus. J’ai vérifié tout : mise à jour du BIOS, placement correct dans les slots A2/B2, réinitialisation du CMOS, même j’ai essayé de réinstaller Windows. Dans CPU-Z, elle indique 2994 MHz et ne monte jamais à 3000 (il faudrait au minimum 6000 MHz). Mon ami avec le même kit obtient 6000 MHz. En Gestion des tâches, elle affiche 6000 MHz, mais wmic montre 4800 MHz. Après un diagnostic, les spécifications indiquent bien une RAM de 6000 MHz/CL30 activée EXPO. Avez-vous des conseils ? Merci d’avance, Roman.
The test uses diagnostic data but displays JEDEC values instead of actual performance metrics. The wmic command might return a different figure than CPU-Z because it reports manufacturer-specified speeds, not real-time CPU utilization.
As mentioned earlier by RONOTHAN## - focus on the "Current frequency," not the "Memory Slot" details. Everything should work properly with your RAM.
Hey! Thank you for your helpful response. Apologies for the delayed reply. At first, I used the user diagnostic tool because I was noticing FPS drops and stuttering in games. After reinstalling my Windows completely, everything seems to be working properly. The only concern was the RAM speed. To clarify, does this mean there’s no real performance difference, and should I be worry-free while gaming? Also, how did you discover that my motherboard lacks an external clock generator? Is this typical? I checked several forums about this model, but many users didn’t report similar issues with EXPO. Initially, I thought the problem was with my RAM and even reached out to Corsair for a replacement. Now I’m uncertain whether it’s worth replacing it or if it’s unnecessary—since you mentioned the system reads JEDEC values and the actual speed is around 6000 MHz (about 5900 MHz).
It's quite typical now that such a setup isn't necessary. Manufacturers often list keywords on product pages to help users find what they need, but this capability is mainly found on boards focused on heavy overclocking. ASRock, for example, refers to it as the Hyper BCLK engine. Back in the day, every board came with one since you couldn’t really overclock without it. Today, most boards include a clock generator built right into the CPU, which is usually sufficient. The only real reason to use one is for BCLK overclocking (which is rarely advised) or when you need to adjust BCLK settings within the operating system—like for world record frequency checks. Even then, standard CPU clock generation usually works fine. On AM5 platforms it adds ECLK overclocking, allowing PBO boosts, but this feature is limited and only found on select budget AM5 boards like the B650 Taichi Lite. It's odd because almost every board without an external clock generator will run BCLK a bit below 100MHz, leading to performance issues. If you're bothered, try disabling spread spectrum in BIOS—it can help you reach closer to 100MHz BCLK, though it might increase EMI if that's a concern.
I couldn't re-upload the photo, as it didn't upload correctly.