B450 Pro4 - 323 GB RAM does not run with 3200 Mhz

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   Hello,
I have a problem with my B450 Pro4
When I bought the board new, I had only 16 GB Ram installed. The RAM was of type 16GB Corsair Vengeance LPX LP black DDR4-3200 DIMM CL16 Dual Kit. These 16 GB ran without problems with 3200 Mhz. 
Now I upgraded the board again and installed another 16 GB RAM of the same type. But I can't run the 32 GB with 3200 Mhz anymore. In the BIOS I loaded the XMP profile DDR4-3200 16-18-18-36 1.35V. But I can't get beyond a clock speed of 2800 Mhz. Can anyone tell me what this is due to? Does the board perhaps not supply enough voltage to run 32 GG at 3200 Mhz? Thanks for your help. 
Rgds
Chris

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Joker269 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 Aug 2019 Location: Germany Status: Offline Points: 8	Post Options Post Reply Quote Joker269 Report Post Thanks(0) Quote Reply Topic: B450 Pro4 - 323 GB RAM does not run with 3200 Mhz Posted: 02 Aug 2020 at 5:34pm
	Hello, I have a problem with my B450 Pro4 When I bought the board new, I had only 16 GB Ram installed. The RAM was of type 16GB Corsair Vengeance LPX LP black DDR4-3200 DIMM CL16 Dual Kit. These 16 GB ran without problems with 3200 Mhz. Now I upgraded the board again and installed another 16 GB RAM of the same type. But I can't run the 32 GB with 3200 Mhz anymore. In the BIOS I loaded the XMP profile DDR4-3200 16-18-18-36 1.35V. But I can't get beyond a clock speed of 2800 Mhz. Can anyone tell me what this is due to? Does the board perhaps not supply enough voltage to run 32 GG at 3200 Mhz? Thanks for your help. Rgds Chris

MrSkullyT Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 23 Jul 2020 Status: Offline Points: 18	Post Options Post Reply Quote MrSkullyT Report Post Thanks(0) Quote Reply Posted: 03 Aug 2020 at 4:41am
	As far as i understand this board only support 3200mhz when using slot A2 + B2. So more than 2 RAM modules won't work.. Correct me if i'm wrong.

datonyb Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 11 Apr 2017 Location: London U.K. Status: Offline Points: 3154	Post Options Post Reply Quote datonyb Report Post Thanks(0) Quote Reply Posted: 03 Aug 2020 at 10:04pm
	theres afew causes and some info from you missing as well firsly DEPENDING on the cpu it may well never have been intended to run 4 sticks at 3200mhz (e.g. if you have 1xxx or 2xxx ryzen cpu) unless you can tell us the cpu its hard to help further with advice/suggestions
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