Processor update

[Shaman_Daniels]

Hello everyone.

1. Tell me, does this PC really only support 2200g and 2400g?

I have a discrete graphics card GT635 and R3 PRO 2200G - in this version - it works.
I've read a bunch of articles online about people trying to install 1600/2600/2700 and failing. The topics are old. I updated my BIOS to 02.24.01 Rev.A (25 October 2024)

Will 1600/2600 (without PRO) work???

2. Also, I have 16 GB RAM 2666 (1 piece, such a configuration), but AIDA shows that it works at a frequency of - 2400. Is this normal? How to fix this?

[NonSequitur777 · Accepted solution]

@Shaman_Daniels,

Welcome to our HP Community forum!

1. CPU Compatibility – Will Ryzen 5 1600 / 2600 / 2700 Work (Non-PRO Versions)?

Short answer: No, standard (non-PRO) Ryzen 1000 and 2000 series CPUs (like 1600, 2600, 2700) are not supported in the HP EliteDesk 705 G4 SFF. This system uses a custom HP OEM AMD B350 chipset motherboard, and HP BIOS firmware restricts CPU compatibility to certain AMD PRO-series processors only.

Details:

• Supported CPUs include:

  • Ryzen 3 PRO 2200G

  • Ryzen 5 PRO 2400G

  • Ryzen 5 PRO 2600

  • Ryzen 7 PRO 2700

  • Ryzen 3 PRO 3200G (sometimes with later BIOS updates)

  • Ryzen 5 PRO 3400G (same caveat as above)

• Why non-PRO CPUs don’t work:

  • HP locks down BIOS microcode support to PRO variants.

  • The microcode required for non-PRO CPUs is absent.

  • Community reports align: users trying 1600/2600/2700 without “PRO” branding typically face boot failure (black screen, no POST).

UserBenchmark only shows PRO CPUs used in this model — strong evidence HP restricts compatibility.

Recommendation:

• Stick with PRO variants (e.g., Ryzen 5 PRO 2600, 2400G).

• If you want a better CPU, consider the Ryzen 7 PRO 2700, which works and gives 8 cores/16 threads.

2. So Why Is Your RAM Running at 2400 MHz?

Here are the likely explanations:

1. Single Module Configuration:

   • You're using one stick of 16 GB DDR4.

   • HP firmware may default to DDR4-2400 when only one DIMM is installed.

   • Dual-channel configurations (2×16GB) are often required to hit max rated speeds.

2. Memory Module SPD (JEDEC Timings):

   • If the stick is a so-called gaming (XMP) module, it might default to its default or SPD 2400 MHz speed.

   • HP BIOS does not support XMP profiles, so RAM only runs at JEDEC speeds.

   • Some 2666 modules default to 2400 JEDEC unless paired or in supported configurations.

3. HP BIOS Auto-Downclocking:

   • Even if the CPU supports 2666, HP’s BIOS may downclock RAM for stability, particularly with single-rank/single-DIMM setups or budget memory brands.

---

Possible Solutions:

• Install a second matching 16GB module to enable dual-channel — this might unlock the full 2666 MHz speed.

• Check RAM SPD using CPU-Z to verify if it even advertises 2666 JEDEC speeds.

• If the RAM never reports 2666 JEDEC and is single-channel, it will stay at 2400 unless replaced.

• Please provide the brand and model RAM stick you are using.

Kind Regards,

NonSequitur777

[Shaman_Daniels]

That is, this is maximum Zen+ and exclusively "PRO"...

OK, thank you!

[NonSequitur777]

@Shaman_Daniels,

You're welcome!

Kind Regards,

NonSequitur777