Issues with my ram/bios

[Codex..]

I have the Tomahawk Max b450 motherboard. I just upgraded my ram to 32 gb Corsair vengeance rgb pro 3600 (4x8), and after trying to tweak the timing snap voltage to get it up to 3600 MHz, the dram light on the mobo stays on after turning on. Now I’m unable to even get to the bios, or boot to windows, so it sits at a black screen and never changes. I’ve tried reseating the ram, resetting cmos, and nothing works. Im able to boot with 3 sticks in, but even after clearing cmos it still won’t work with 4. Any input and help would be gratefully appreciated, I just want to be able to get back to the bios at this point.

[Bad 💀 Motha]

Its most likely not going to do above 2933-3200, especially with all 4 DIMMs populated.
I'd suggest 2x16GB 3200; Corsair Vengeance RGB or GSkill Trident Z RGB

[_I_]

looks like amd still has imc issues with running 4 dimms at high speeds
3200 could be about its limit
using 2 dimms set the ram speed to 2666 default, then add the other 2
then try 3000 xmp/docp profiles and see if it works

it may also need a voltage bump to run 4 dimms, 1.25-1.3v

[Ochso]

Picked up some faster Ram for my main rig ( via amazon sale) .
So I moved my Corsiar vengeance 3200 4x8Gb sticks to my second rig. which happens to have the Tomahawk Max B450 running a 3700x

Bios fully updated and cleared etc No oc. and machine runs ok however it does not like powering down. ie win10 shuts down fully but cpu and gfx fans keep on running until a hard power off via either button or mains. tried using the xmp 1 & 2 profiles and manually setting them up . exactly the same result.

Its possible Mobo just doesnt seem to like 4 sticks. ( take 2 out and zero shut down problems)

[Bad 💀 Motha]

AMD Boards in the history of AMD (where DDR RAM is concerned) overall has never liked it when all 4 DIMMs are populated. Many Intel boards can be the same way too, where when using all 4 DIMMs you may be required to use a lower RAM Freq.

Most B450 boards max out @ 3200 RAM
So if going to use 4x 3200 RAM modules, reset the BIOS.
Update to latest non-Beta BIOS.
Then enter the BIOS, enable the 3200Mhz XMP Profile, then tweak the DRAM settings manually by changing the DRAM Freq = 2933 or 3000 Mhz

[Codex..]

Originally posted by Bad 💀 Motha:

AMD Boards in the history of AMD (where DDR RAM is concerned) overall has never liked it when all 4 DIMMs are populated. Many Intel boards can be the same way too, where when using all 4 DIMMs you may be required to use a lower RAM Freq.

Most B450 boards max out @ 3200 RAM
So if going to use 4x 3200 RAM modules, reset the BIOS.
Update to latest non-Beta BIOS.
Then enter the BIOS, enable the 3200Mhz XMP Profile, then tweak the DRAM settings manually by changing the DRAM Freq = 2933 or 3000 Mhz

Alright thank you for the input, I wish I had done more research and found this out. Luckily I can still return them so I’m good on that. I’ll take your recommendation and just stick to 2 sticks. Man this has been a headache

[Codex..]

Originally posted by _I_:

looks like amd still has imc issues with running 4 dimms at high speeds
3200 could be about its limit
using 2 dimms set the ram speed to 2666 default, then add the other 2
then try 3000 xmp/docp profiles and see if it works

it may also need a voltage bump to run 4 dimms, 1.25-1.3v

I tried upping the voltage and still nothing helped. I think I’ll stick to just 2 sticks, thought 4 would be fine but i guess sadly not

[Bad 💀 Motha]

Originally posted by Codex..:

Originally posted by Bad 💀 Motha:

AMD Boards in the history of AMD (where DDR RAM is concerned) overall has never liked it when all 4 DIMMs are populated. Many Intel boards can be the same way too, where when using all 4 DIMMs you may be required to use a lower RAM Freq.

Most B450 boards max out @ 3200 RAM
So if going to use 4x 3200 RAM modules, reset the BIOS.
Update to latest non-Beta BIOS.
Then enter the BIOS, enable the 3200Mhz XMP Profile, then tweak the DRAM settings manually by changing the DRAM Freq = 2933 or 3000 Mhz

Alright thank you for the input, I wish I had done more research and found this out. Luckily I can still return them so I’m good on that. I’ll take your recommendation and just stick to 2 sticks. Man this has been a headache

Like I said, just enable the XMP; so that every RAM setting via that XMP profile gets changed in the BIOS, then go and manually change just the DRAM Frequency to 2933 or 3000

Then save & exit and see how it does like that.

Best bet is just sticking to 2x 16GB though really.

On most B550 boards I had no problems doing 2x 16GB @ 3600 Mhz

[Codex..]

Originally posted by Bad 💀 Motha:

Originally posted by Codex..:

Alright thank you for the input, I wish I had done more research and found this out. Luckily I can still return them so I’m good on that. I’ll take your recommendation and just stick to 2 sticks. Man this has been a headache

Like I said, just enable the XMP; so that every RAM setting via that XMP profile gets changed in the BIOS, then go and manually change just the DRAM Frequency to 2933 or 3000

Then save & exit and see how it does like that.

Best bet is just sticking to 2x 16GB though really.

On most B550 boards I had no problems doing 2x 16GB @ 3600 Mhz

The problem with trying that with all 4 sticks in is that I can’t even get into the bios. The dram debug lights illuminated after the system is turned on and nothing happens. I let it sit to let it try and work it’s way through it but still nothing. I may just try and get some 2x16 sticks so I don’t have to worry about it

[Bad 💀 Motha]

Then install 2x 8GB, boot and enter the BIOS. Enable DOCP/AMP/XMP ram profile.
Then change the DRAM Freq to 2933 or 3000. Save & Exit. Once in Windows verify this is all correct using the CPU-Z app. CPU-Z showing RAM @ 1466 = 2933 / 1500 = 3000

Then run a stability test, such as Prime95, Small FFTs Loop Test for approx 30 mins.
Or run a Bootable MemTest and let it run Extended Mode for 5 Loops.

Once this is proven stable, shutdown the PC and install the other 2x 8GB.

Boot up the system and if the 2933 or 3000 works fine, then 4x 8GB should work fine like this.

[r.linder]

Depending on the die, upping the voltage won't do you any good.
For example, Hynix CJR aka C-die often hates running more than 1.35v.

SOC voltage should also be between 1v and 1.1v and you may need to tweak cLDO_VDDP, VDDG IOD, and VDDG CCD voltages. The first one can't exceed DRAM voltage while the other 2 can't be higher than 50mv below your SOC voltage, so if the SOC is 1v, those 2 voltages cannot exceed 0.950v. Raising SOC usually won't give you anything, and pushing it too high could damage the IMC in the CPU and make things worse.

If you're not using a 3000 series or newer CPU, you have nothing to gain by going with RAM faster than 3200 MHz anyway, it's diminishing returns and a potential loss in system stability.

Highly recommend trying 1usmus' DRAM calculator for Ryzen, it can give you a starting point.
With some tweaking, it could be possible to get 3600 MHz running, but most people don't have the patience to test RAM that extensively so they turn to conclusions like saying it's not possible to run that speed on B450. But I've seen many users do exactly that.