XMP lowering clock speed+perfomance on Ryzen 7700X
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=108763
Printed Date: 18 Jul 2025 at 5:18pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: XMP lowering clock speed+perfomance on Ryzen 7700X
Posted By: carthrottle_fan
Subject: XMP lowering clock speed+perfomance on Ryzen 7700X
Date Posted: 16 May 2025 at 8:26am
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Hey guys, So I am running my CPU with my Asrock B650i Lightning WiFi mobo and I wanted to enable XMP on my RAM kit (Kingston 64GB KF560C30BBK2-64 at 6000 MT/s, CL30-36-36) After enabling this setting, my PC is in fact running slower than with standard JEDEC speeds (slower on boot time, lower clock speeds and overall lower performance in a benchmark like Cinebench R24). My Bios is updated to the latest version (3.20) and I am currently running my CPU at -20CO offset via the builtin profile in bios. Also in Cinebench I noticed a decrease from 860 to around 690ish points with XMP enabled. Is this a motherboard limitation? (with it being a mini ITX, maybe there were power constraints with the VRMs?) Or could it stem from a thermals issue?(I am running quite hot on the CPU in this SFF build, reaching TJMax of 85c from the built-in PBO profile and sitting normally in high 60s-low 70s) Thanks! |
Replies:
Posted By: eccential
Date Posted: 16 May 2025 at 9:53pm
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Motherboard form factor isn't relevant. AsRock says B650i Lightning WiFi has 8+2+1 60A Dr.MOS, which should be more than enough for 7700X. Are those 60/70 -> 85C CPU temperatures? If so, wow, I would NEVER run anything I own that hot. I'm a reliability nut. I NEVER enable boost on any of my CPUs, and 100% of my PC builds for myself use ECC memory. I run my 9800X3D with boost disabled, meaning, it tops out at 4.7GHz, which is plenty fast for me. I don't like giving even 1.1V to any of my CPUs, and prefer to keep them under 1.0V. Obviously, I'm not a good reference point. Note, negative offset on a CPU that really can't deal with it will reduce performance because it will activate clock stretching. Instead of crashing, it stretches clock period to slow things down, so it doesn't crash. I never do XMP/EXPO because all memory I buy are unbuffered ECC memory, which are all JEDEC only. But do check if enabling it affects FCLK / UCLK. I think 2000MHz FCLK and 1:1 ratio is safe. I actually had to manually restore them after 3.20 BIOS update on my B850M-X. Originally, it defaulted to that, but after the BIOS update, it went down to 1750MHz FCLK and 1/2 speed UCLK (1400MHz). That's ridiculous. I forced it to 2000MHz FCLK and 2800MHz UCLK (for my JEDEC 5600MT/s memory). Stupid BIOS. Anyway, get HWiNFO64 and check your settings, as well as see if it's thermal-throttling. |
Posted By: M440
Date Posted: 17 May 2025 at 12:45am
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what if you put memory training to auto? https://forum.asrock.com/forum_posts.asp?TID=30954&PN=1&title=solved-b650m-hdv-m2-bios-memory-stability-issues https://ibb.co/pw6yMjG" rel="nofollow">  https://ibb.co/qn9cx0R" rel="nofollow">  https://ibb.co/YTJnNnX" rel="nofollow">  ------------- asrock b650m-hdv/m.2, ryzen 7700x@85watt, arch/kde |
Posted By: carthrottle_fan
Date Posted: 17 May 2025 at 4:08pm
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Thanks for the reply, but could you maybe explain how does that auto memory training work, what does it do? Or should I just check in the manual if there's a reference for it But I will see if my Bios has this option, as I don't remember running into it so far. |
Posted By: carthrottle_fan
Date Posted: 17 May 2025 at 4:11pm
| I am also quite wary about reliability, but I do like squeezing as much as I can from my hw, without raising voltages ideally or if so, very little. It is possible there is some thermal throttling as apparently this CPU should sit quite happily at 5GHZ all-core on full load apparently, so I will need to look into that. |
Posted By: eccential
Date Posted: 18 May 2025 at 5:19am
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All cores 5GHz fully loaded should consume about 100W. What kind of cooling set up do you have? |
Posted By: carthrottle_fan
Date Posted: 18 May 2025 at 6:17am
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Seems I forgot to mention in the post, but I am running the Cooler Master 280mm AIO that came with the Max package of my case, set to exhaust on top. Bottom I have 2*120mm fans, set to intake. These are all the fan slots for my case, CoolerMaster NR200P v2 Max |
Posted By: eccential
Date Posted: 18 May 2025 at 9:11am
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You have 280mm AIO and the CPU is in high 60s-low 70s idle!? That sounds wrong. I understand 7000 series runs hotter than 9000 series, but that still seems high. I'm at just about 11C over ambient on my 9800X3D at idle (i.e. 37C at 26C ambient), with a basic air cooler (Noctua NH-D12L) in a Fractal Design Pop Mini Silent -- not even Mesh! |
Posted By: carthrottle_fan
Date Posted: 18 May 2025 at 4:19pm
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Yeah, temps are an issue. 70 is not really in idle per se, more like medium use. Truly idle idle its in its low 60s probably, still some 25ish above ambient. Thing is the PC is in an opening in my cabinet and its only unobstructed site is the left side, I will upload a drawing via imgur/similar. I can't move the PC anywhere else, and going SFF was a consequence of this lack of space in my student dorm. ------------- Why do I have such an expensive passions(cars), and not a cheap one like knitting? |
Posted By: carthrottle_fan
Date Posted: 18 May 2025 at 4:20pm
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https://imgur.com/a/Piwy61C" rel="nofollow - https://imgur.com/a/Piwy61C ------------- Why do I have such an expensive passions(cars), and not a cheap one like knitting? |
Posted By: eccential
Date Posted: 18 May 2025 at 7:14pm
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I just looked up MasterBox NR200P. It doesn't have any opening at all in the front! Without some form of forced air (fans) or even some 3D printed air guides, the hot air is going to just circulate around in the cabinet. You can even check that with a simple thermometer. Surely there's a better way to go about this. Why even bother with an AIO if the radiator is just going to be fed hot air? (I've NEVER used any sort of liquid cooling in my entire life, because, again, reliability nut). Maybe put some 120mm-140mm fans on the left side where there's most space? |