Z790 Pro RS with 256 GB RAM

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   Z790 Pro RS with 256 MB RAM ...
I'm looking for a 256MB RAM kit (4x64) but can't find anything.
The RAM specifications on the website say the maximum RAM supported by the Z790 Pro RS with RaptorLake is 256MB, but the list of supported RAM modules doesn't show any 256GB ones, only 192MB ones.
Can someone help me find those RAM modules?
Regards

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Tezuya Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 21 Oct 2025 Status: Offline Points: 45	Post Options Post Reply Quote Tezuya Report Post Thanks(0) Quote Reply Topic: Z790 Pro RS with 256 GB RAM Posted: 21 Oct 2025 at 11:21am
	Z790 Pro RS with 256 MB RAM ... I'm looking for a 256MB RAM kit (4x64) but can't find anything. The RAM specifications on the website say the maximum RAM supported by the Z790 Pro RS with RaptorLake is 256MB, but the list of supported RAM modules doesn't show any 256GB ones, only 192MB ones. Can someone help me find those RAM modules? Regards

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 30598	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 22 Oct 2025 at 6:22am
	For RAM compatibility it's always best to check the compatibility page on the RAM's webpage. The support lists from motherboard manufacturers almost never get updated. It makes sense, once the product is launched it doesn't make financial sense to keep testing and verifying every single RAM module that becomes available. With as many board models as there are it would take an incredible amount of labor to do. RAM manufacturers are far more numerous so it's easier to let them test a selection of boards with each of their RAM models than to test potentially hundreds of new RAM modules every few months on dozens of board models for each platform, not to mention older platforms. A quick look at GSkill's 256gb kits shows no kits listed with support for intel platforms at all, from any brand (ASUS, MSI, ASRock etc). For now I would avoid 256gb kits on your system, at least until more are certified for Intel's XMP architecture. Every kit I found only lists AMD EXPO support, a good indicator that it won't work on Intel systems or it would list EXPO AND XMP support. here is a 2x64gb kit from GSkill with XMP support As you can see here the 4x64gb kits only support EXPO. Your best bet is to either wait and use a smaller kit for now or check Redit/google for anyone else who has successfully run 4x64gb kits on a Z790 board.


redbek Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 12 hours 36 minutes ago Status: Offline Points: 30	Post Options Post Reply Quote redbek Report Post Thanks(0) Quote Reply Posted: 12 hours 19 minutes ago at 6:37am
	sorry to post in this thread but I can't create a new one and it concerns the same motherboard. System Specifications: Motherboard: ASRock Z790 Pro RS CPU: Intel Core i5-14600K (13th/14th Gen Raptor Lake Refresh) RAM: Patriot Viper Venom 2x 16GB DDR5-7000 MT/s (PC-56000) - Model: PVVR32G700C32K RAM Specs: 7000 MT/s, CL32, 1.45V, XMP 3.0 Problem Description: The system boots normally with a single RAM stick in slot A2, but immediately shows a red DRAM LED on the motherboard's status checker and fails to POST when both RAM sticks are installed in slots A2 and B2 (the recommended dual-channel configuration). What I've Already Tried: ??CMOS Reset - Removed battery for 5+ minutes and used CLR_CMOS jumper ??BIOS Update - Updated to the latest BIOS version available ??Both RAM sticks work individually - Each stick boots fine when installed alone in slot A2 ??Tested different configurations: Started with JEDEC default settings (4800 MT/s, 1.1V) Disabled XMP completely Set DRAM Gear Mode to Gear 2 Manually configured voltages: DRAM Voltage: 1.10V (instead of XMP 1.45V) VDD_CPU: 1.25V VDD_IMC: 1.30V Tried "Stable Mode" instead of "OC Mode" Enabled MRC training options ??Verified slot configuration - Using A2 + B2 as per manual (2nd and 4th slots from CPU) ??RAM is fully seated - Security clips locked on both sides Current Behavior: Single stick in A2: ??System boots normally, stable, no issues Both sticks in A2 + B2: ??Red DRAM LED, no POST, cannot enter BIOS Even at lowest JEDEC settings (4800 MT/s): ??Still won't boot with dual configuration Question: Is this a known issue with the Intel i5-14600K memory controller and high-frequency DDR5 RAM on the Z790 Pro RS? I've read about degradation issues with 13th/14th gen Intel CPUs affecting memory stability. Should I: RMA the CPU (possible faulty memory controller)? Try different RAM with lower frequency? Is there a specific BIOS setting I'm missing for dual-channel DDR5 on this board? Any help would be greatly appreciated!