Hi guys,

I used to build PCs and OC them etc but last time I did that was in the mid 2000s. Think AMD Barton/Throughbred time. Anyway, recently at work needed a much more powerful workstation for crunching large amounts of data and the gaming laptops we had in the office were simply not cutting any more. So I thought I could just wing it and put together a system to do the data crunching. A rough outline of the build is

CPU : 7950X
MB : ASROCK X670E PRO
GPU : ASUS RTX4070Ti
SSD 1 : ACER Predator 1TB PCIE4
SSD 2 : ACER Predator 2TB PCIE4
Casing : NZXT H9 Flow
RAM : KINGSTON Fury Beast RGB 64GB (32x2) x 2
PSU : ASUS 1200W
CPU Cooler : NZXT Kraken 360 RGB Black

The PC works out of the box and I am aware of the fundamental behaviour of the newer CPUs where they push power and clock speeds till hit max temp then throttle back but there are a few things that I am unsatisfied about. Hoping to get some pointers here

1) Its not the temperature of the CPU that bothers me, in fact I am expecting it to hit the 90+ deg C level but its how fast it reaches it. I tied the cooler fans and pump speed to the CPU temp so basically once its more than 60 deg C, the fans and pump are running at full tilt. Coolant temp never exceeds 32 deg C but the CPU reaches 90 in a very short time (like not more than 10 seconds). This happens only when I am crunching data. Could it be due to insufficient pressure between the pump and IHS? Or insufficient thermal paste? I just left whatever the came with the cooler on it and just used it.

2) I tried using the Ryzen master to try to come up with a profile. It came up with a -40 profile but once applied, the system would never boot up. So far I used a less aggressive number like -10 and its stable so far. I find that the temps still rocket to 90+ but just not so fast and it can hold all the cores at about 5.450 GHz about 50% longer. is there a detailed guide on how the voltages and clocks relate to each other. Its so confusing relative to 20 years before where it was just FSB x multiplier

3) I have all the RAM running but I can never get it past 4000 MT/s. I know I made the mistake of not making sure the RAM was AMD expo certified. Is it possible to manually push the 4 sticks to at least 5200 speeds?

Just hoping for tips for troubleshooting and if possible any guides for modern system overclocking/tuning. I prefer PDFs to YT videos (old school mah)

deleted.

This post has been edited by lawrencesha: Feb 5 2024, 06:39 AM

Will start with the first thing on ethe list later. Thanks

Pretty sure I took off the plastic cover off lol.

BIOS is updated to the latest version. I know 4 stock

NZXT CAM software is working OK? Auto boot up?

Apparently, it might affect it. The fan curve settings.

Online peeps getting well while gaming around 70 Celsius.

With your CPU intensive calculation and Malaysian weather I say 90 Celsius is expected. Ramping up short time seems expected if cpu is 100% utilize. 7950x is designed to until 95 Celsius.

This post has been edited by AthrunIJ: Feb 5 2024, 07:49 AM

https://www.techspot.com/review/2535-amd-ryzen-7950x/

@TS: you can try profile the Vcore to temp, and see if the BIOS is intentionally pushing the temp to ~95C and then 'play/operate' there

https://www.techpowerup.com/review/amd-ryze...mal-throttling/

What I understand (and AIO/WC kakis can correct me if Im wrong), water does not have efficient instantanous heat transference properties, so a sudden burst of workload will create a surge of CPU heat but that could not be efficiently transfered from the coldplate to the water medium.

This is why WC setups dont work well with sudden load surges however because of the mass flow of water constantly taking heat away it has overall better cooling properties if a high heatload is sustained (this is reason why WC can handle hotter CPU and not throttle for hours of use).

Also IINM because of the above reason, WC needs a higher fan curve to keep up the heat transference out of the rad or else set the fan to constantly run at higher speeds. As much as it takes longer for heat to transfer from coldplate to water its also takes longer for heat to transfer from water to rad and out from system. If that heat is not efficiently evacuated, the water temp within might have been higher which leads to less efficiency of heat being transfered out.

As for running 4x RAM sticks at XMP/EXPO, I heard about Ryzen being picky about RAM setups & timings. You could try troubleshoot in stages by running 1x stick at XMP, then 2X stick, then try 4X sticks again. If XMP speed works at certain points that means the system cannot handle 4x sticks at XMP or else you have to do some manual tuning.

That's why I tied the fan and pump curve to CPU temp and not the coolant temp. At least if it spikes, the system tries to catch up as soon as possible. But still worrying that I cannot hold the temps low enough.

I knew the RAM speed wouldn't be that high although the ones that I am using are listed in the motherboard certified lost but only for 2 units. But to do what you said like manual tweaking, I wanted to find a guide so that I can increase the signalling voltage to see if it improves anything. Also looking for information on drive strength. From the manual, it's just a number. Is it in mA? Or just a scalar number?

Its the spike which your having problem since its too high for your liking, try to limit the system either thru lower CPU clock or undervolt. Or else gradually step in the surge so as not to overload the cooling system.

Otherwise just set rad fans to a constant high speed.

Cant really help you on RAM tweaking as I barely understand all the intricacies myself, you will have to go down a rabbit hole on this from the net. Buildzoid youtube has lots on RAM tweaks. If you want the advertised speed you may have to run only 2x sticks as per the QVL, anything above is not guaranteed to work at the speed or even if it will work after tweaking.

This post has been edited by babylon52281: Feb 7 2024, 10:35 AM

hehe.. my designer studio client built almost same thing.. i tell u.. EXPO problem more than u can image.. rather take 5600MHZ value ram than EXPO certified RAM.. n B650 Tomahawk BEAT most of the RM2k below mobo..

open to other quote??

I think the bro here ady has the system but needs help getting EXPO working, thats all

Reddit user has something quite similar to TS system also with XMP/EXPO issue
https://www.reddit.com/r/ASRock/comments/16...r_sticks_is_it/

EXPO problem unending

TS can only pray that constantly updating Agesa bioses will eventually fix his problem before it screws up and brick the mobo. Otherwise just stay with 2x sticks of RAM.

Thanks for the link. Will go through it slowly later.

Like Babylon said, the system is working. It's just I want to try and fine-tune the performance as I am using the system to do map processing. I roughly process about 100k images at a go resulting in chunks of maps about 30-50gb each. So I am hoping if tweaking the system a bit will improve the performance as typical processing time for one block is about 5 days non stop so every little bit helps.

i can tell u.. the problem wont END.. my client still run mission critical machine with intel.. AMD screw up on n off... especially if u run on win 11

On the positive side, it appears that Ryzen 8000 series seems to like much higher speeds DDR5 and since AM5 is forward upgradeable perhaps your other hope is upgrade to a 8950X (when it comes) and hope its IMC is much better at taking 4x sticks of RAM to be stable at higher speeds. Just my 2sen.