Z690 PG Velocia not booting with XMP enabled

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   Hi
MB: Z690 PG Velocita
CPU: 12900K
Memory:  Corsair Dominator Platinum 2x16GB DDR5 6200
GPU: 3080ti

The pc refuse to boot up with XMP (6200MHz 36-39-39-76 1,3V) enabled. If I use manual setting I can get it to boot at 6166MHz, but 6200 is no-go.

I've also had three crashes in iRacing on this computer, never had issues with the same gpu on a ryzen 5900 setup.

Is this a mb/bios issue?

/Vegard

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veggiss Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 23 Mar 2022 Status: Offline Points: 80	Post Options Post Reply Quote veggiss Report Post Thanks(0) Quote Reply Topic: Z690 PG Velocia not booting with XMP enabled Posted: 23 Mar 2022 at 5:30pm
	Hi MB: Z690 PG Velocita CPU: 12900K Memory: Corsair Dominator Platinum 2x16GB DDR5 6200 GPU: 3080ti The pc refuse to boot up with XMP (6200MHz 36-39-39-76 1,3V) enabled. If I use manual setting I can get it to boot at 6166MHz, but 6200 is no-go. I've also had three crashes in iRacing on this computer, never had issues with the same gpu on a ryzen 5900 setup. Is this a mb/bios issue? /Vegard

threadzipper1957 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 05 Mar 2022 Status: Offline Points: 9365	Post Options Post Reply Quote threadzipper1957 Report Post Thanks(0) Quote Reply Posted: 23 Mar 2022 at 5:44pm
	Dear Vegard, The memory controller is not on the board, it is integrated in the CPU, and in this CPU runs optimal at 4800MHz with DDR5, 3200MHz with DDR4 https://ark.intel.com/content/www/us/en/ark/products/134599/intel-core-i912900k-processor-30m-cache-up-to-5-20-ghz.html XMP is basically oveclocking for beginners, it is a profile that is supposed to work on all the thousands of combination of CPU, chipset and mainboard. It is not guaranteed, and you must always select it manually. Maybe the memory controller inside the CPU cannot handle 6200. Using manual settings allows you to lower the latency timing, because XMP is far from optimal. When using a tool like thaipoon burner, you can see the SPD and XMP profiles stored on the SPD chip, on the memory. One tip: USe a FAT formatted USB stick, it is easy to make BIOS screenshots by pressing the f12 key. Later you can print some of these, and use them to set different timings.
	Kind Regards

threadzipper1957 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 05 Mar 2022 Status: Offline Points: 9365	Post Options Post Reply Quote threadzipper1957 Report Post Thanks(0) Quote Reply Posted: 23 Mar 2022 at 5:46pm
	Extra note:] When you OC above 4800MHz, only a synthetic memory benchmark will show better results, but usually it does not have much impact on the overall performance of the system, lower latency timings should give some performance increase Maybe it is different with DDR5, but with DDR4, it never did much good
	Kind Regards

veggiss Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 23 Mar 2022 Status: Offline Points: 80	Post Options Post Reply Quote veggiss Report Post Thanks(0) Quote Reply Posted: 28 Mar 2022 at 6:59pm
	Thank you for your reply. Looking around it looks like the cpu should handle the speeds without any issue, but not on my rig. I adjusted the settings back down to auto now, and the system is stable. Guess I need to try a different mb/cpu/ram combo.

Gatt59 Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 04 Feb 2022 Location: Milan - Italy Status: Offline Points: 420	Post Options Post Reply Quote Gatt59 Report Post Thanks(0) Quote Reply Posted: 29 Mar 2022 at 7:54pm
	I'm using the same motherboard with an Intel Core i9-12900F and 2x16GB Corsair Vengeance DDR5 @5600Ghz (36-36-36-36-76). If I choose the XMP 3 profile I don't have any problem (work, gaming and stress tests). I guess that the 6200GHz RAM is the problem.

veggiss Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 23 Mar 2022 Status: Offline Points: 80	Post Options Post Reply Quote veggiss Report Post Thanks(0) Quote Reply Posted: 30 Mar 2022 at 7:05am
	I managed to boot the system with the sticks at 6200MHz, but the system is far from stable. Took out one stick an ran just a single, and that worked out fine. I'll test the other stick tomorrow.

Gatt59 Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 04 Feb 2022 Location: Milan - Italy Status: Offline Points: 420	Post Options Post Reply Quote Gatt59 Report Post Thanks(0) Quote Reply Posted: 30 Mar 2022 at 1:05pm
	Have you updated the bios? ASRock has updated the Velocita bios many times from January. The last one just yesterday. One of the bios has an improved Intel XMP version (v1.2) and the last one (v8.03) even the possibility to "Load Intel Base Power Limit Settings".

Gatt59 Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 04 Feb 2022 Location: Milan - Italy Status: Offline Points: 420	Post Options Post Reply Quote Gatt59 Report Post Thanks(0) Quote Reply Posted: 30 Mar 2022 at 1:09pm
	I forgot ... three bios updates improved the memory compatibility. Good luck!

veggiss Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 23 Mar 2022 Status: Offline Points: 80	Post Options Post Reply Quote veggiss Report Post Thanks(0) Quote Reply Posted: 30 Mar 2022 at 9:50pm
	Missed the one yesterday and today, I'll try those!

veggiss Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 23 Mar 2022 Status: Offline Points: 80	Post Options Post Reply Quote veggiss Report Post Thanks(0) Quote Reply Posted: 30 Mar 2022 at 10:59pm
	Updated BIOS, no luck. I have now tested both stick separately, I the pc works like a charm @6200Mhz. With both inside it crashes, or refuse to boot at all. Time for a new mb.