Question Low Cinebench R23 score on a 2x360mm cooled Ryzen 7950X ?

[catcream]

Hello! I am getting 32400 multicore on CinebenchR32 on my 7950x and I have no clue why I'm getting such a low score.

My setup is:
Mobo: ASRock B650 PG Lightning
CPU: Ryzen 7950X with Corsair XC7 waterblock
RAM: Corsair 64GB (2x32GB) DDR5 5600MHz CL40 Vengeance AMD EXPO/Intel XMP 3.0
2x360mm radiators with Noctua and Arctic fans.
Corsair XD5 pump+rad combo.

I control my cooling with an Arduino since my motherboard does not have a temperature sensor header, but when benchmarking I used full speed on everything.

Here's my HWiNFO screenshot while running CinebenchR23 multicore: any ideas? Thanks!

 

[punkncat]

In a quick look, I would point my finger directly at: "ASRock B650 PG Lightning".

Really shouldn't be using a budget B motherboard for a CPU of that level. Phantom Gaming has been known for having power delivery issues, but to my surprise it looks as if this board has some pretty decent VRM/power delivery.

Your temps seem quite high for a liquid cooler of that size. Are you sure it is pasted and seated correctly? You took out the plastic covering on the plate?

 

[catcream]

Really shouldn't be using a budget B motherboard for a CPU of that level. Phantom Gaming has been known for having power delivery issues, but to my surprise it looks as if this board has some pretty decent VRM/power delivery.

Yes, I chose this board by looking at the Hardware Unboxed B650 tests. Has enough features for me and seems to have good enough VRMs for 7950x (71 deg C after 1 hour Cinebench)

View: https://youtu.be/ZtHOOyWYiic?si=QTgkmcqVnIpWoVfC&t=1292

Your temps seem quite high for a liquid cooler of that size. Are you sure it is pasted and seated correctly? You took out the plastic covering on the plate?

I'm also suspecting something weird with my CPU block. I just tried repasting it with Arctic MX-4 but there's no difference. Temps seem pretty high just browsing the internet. My GPU has very good temps and is idling at 26° no issues.

 

[catcream]

Btw, when people say just "cpu temp", do they usually mean Tctl/Tdie?

 

[Zerk2012]

I would say the slow 5600 cas 40 RAM. You should be using 6000 cas 30

 

[punkncat]

^ What is your ambient temperature?

Is the custom WC working with both the CPU and the GPU on the same loop? Making certain assumptions would presume that one rad is on intake and the other is exhaust. This, along with actually too high a fan speed could basically just be injecting the heat from the intake rad right back to the exhaust one. Obviously, there are pump speed considerations to make.

Try a test where, for instance, you set the pump at 80%, and drop the fan speeds down incrementally. Might even be worthwhile to take the side panel off the case which would eliminate the heated airflow aspect.

 

[catcream]

I would say the slow 5600 cas 40 memory you should be using 6000 cas30

Okay, so is my score normal for 5600 cas 40? I'm fine with the performance I get so I don't want to upgrade but I wonder why it is so low.

 

[catcream]

^ What is your ambient temperature?

Is the custom WC working with both the CPU and the GPU on the same loop? Making certain assumptions would presume that one rad is on intake and the other is exhaust. This, along with actually too high a fan speed could basically just be injecting the heat from the intake rad right back to the exhaust one. Obviously, there are pump speed considerations to make.

Try a test where, for instance, you set the pump at 80%, and drop the fan speeds down incrementally. Might even be worthwhile to take the side panel off the case which would eliminate the heated airflow aspect.

21C, yes CPU and GPU on same loop. I use both rads as intake and I have 120mm + 2x140mm fans as exhaust. All fans are controlled by same PWM signal and I have pump CPU temp based.

 

[punkncat]

I think you mentioned something above about that mobo not having all the temp sensors and you were using an Arduino board for control of the fan curves?
In that case, what is measuring actual temp? What input in the HWiNFO actually gathering information from?

 

[catcream]

Yes, I control the fans based on water temperature. HWiNFO measures CPU temp and others as usual.

 

[TheHerald]

Yes, I chose this board by looking at the Hardware Unboxed B650 tests. Has enough features for me and seems to have good enough VRMs for 7950x (71 deg C after 1 hour Cinebench)

View: https://youtu.be/ZtHOOyWYiic?si=QTgkmcqVnIpWoVfC&t=1292



I'm also suspecting something weird with my CPU block. I just tried repasting it with Arctic MX-4 but there's no difference. Temps seem pretty high just browsing the internet. My GPU has very good temps and is idling at 26° no issues.

High cpu temp when browsing the net is expected, as you can see from your power draw numbers ryzen chips due to the interconnect and multiple dies consume a truckload of power for these simple tasks. Your chip is casually hitting 70 watts browsing the web so it's a given.

Try running a cbr23 and show us power draw during the run. If it doesn't go to 230w then clearly your cooler setup has a contact issue.

 

[TheHerald]

Okay, so is my score normal for 5600 cas 40? I'm fine with the performance I get so I don't want to upgrade but I wonder why it is so low.

No, ram plays a very tiny part in cinebench. You'll get like 500 extra points going with super fast ram that's not the issue here.

 

[CountMike]

Your system is poorly optimized, all core frequency not hitting even 5GHz but can and should go to at least 5.3 to 5.4GHz. Power delivery is low too, probably due to VRM restrictions, it can go as high as 240W for top performance. In short, you need better, x670 MB and control of voltages.

 

[catcream]

High cpu temp when browsing the net is expected, as you can see from your power draw numbers ryzen chips due to the interconnect and multiple dies consume a truckload of power for these simple tasks. Your chip is casually hitting 70 watts browsing the web so it's a given.

Try running a cbr23 and show us power draw during the run. If it doesn't go to 230w then clearly your cooler setup has a contact issue.

Hey, PPT seems to briefly reach 200W and then drops to 170W when running Cinebench. Temperature immediately goes to 95C. I run fans and pump at 100%.

I went into bios and manually set PPT = 230000mW, TDC = 160000mA, and EDC = 225000mA which can be seen in Ryzen Master.

 

[catcream]

Your system is poorly optimized, all core frequency not hitting even 5GHz but can and should go to at least 5.3 to 5.4GHz. Power delivery is low too, probably due to VRM restrictions, it can go as high as 240W for top performance. In short, you need better, x670 MB and control of voltages.

From what I've seen the PG Lightning should have adequate power delivery for 7950x. Even an ASRock B650-HDV with worse VRM setup did this https://wccftech.com/asrock-110-us-...rclocking-world-record-amd-ryzen-9-7950x-cpu/.

x670 MB and control of voltages.

Do you think the voltage control could be messed up, giving me too high CPU voltage causing it to overheat for no reason?

 

[CountMike]

From what I've seen the PG Lightning should have adequate power delivery for 7950x. Even an ASRock B650-HDV with worse VRM setup did this https://wccftech.com/asrock-110-us-...rclocking-world-record-amd-ryzen-9-7950x-cpu/.


Do you think the voltage control could be messed up, giving me too high CPU voltage causing it to overheat for no reason?

Yes, shouldn't go over 1.225v.

 

[CountMike]

From what I've seen the PG Lightning should have adequate power delivery for 7950x. Even an ASRock B650-HDV with worse VRM setup did this https://wccftech.com/asrock-110-us-b650-motherboard-sets-overclocking-world-record-amd-ryzen-9

From what I've seen the PG Lightning should have adequate power delivery for 7950x. Even an ASRock B650-HDV with worse VRM setup did this https://wccftech.com/asrock-110-us-...rclocking-world-record-amd-ryzen-9-7950x-cpu/.


Do you think the voltage control could be messed up, giving me too high CPU voltage causing it to overheat for no reason?

-7950x-cpu/.


Do you think the voltage control could be messed up, giving me too high CPU voltage causing it to overheat for no reason?

7950x needs at least 240W for full performance, yes it can run on less but with performance loss or at sub zero where it has less resistance which is the key to extreme oC.

 

[catcream]

Yes, shouldn't go over 1.225v.

During Cinebench I get 1.095V VDD and 1.185 SOC. My VDD voltage sits at 1.35V idle.

 

[catcream]

7950x needs at least 240W for full performance, yes it can run on less but with performance loss or at sub zero where it has less resistance which is the key to extreme oC.

Alright, is there an easy way to know if I'm being power limited or thermal throttled by my cooler? I'd guess it's the cooler since it's at 95 C and power drops from 200W to 170W almost immediately when I start Cinebench.

 

[CountMike]

Alright, is there an easy way to know if I'm being power limited or thermal throttled by my cooler? I'd guess it's the cooler since it's at 95 C and power drops from 200W to 170W almost immediately when I start Cinebench.

Yes, TjMax is 95c and it will automatically drop to save itself. That's same thing that caused latest Intel chips, MB manufacturers allowed it to go too high. Threshold to shut down is too close at 105c.

 

[CountMike]

When I allow my 7900x which i designed for 170W on my 180W VRM it already heats up but CB23 score exceeds 31000 points at 5350MHz all core frequency but temps sta bellow 85c where it gets most boost.

 

[catcream]

When I allow my 7900x which i designed for 170W on my 180W VRM it already heats up but CB23 score exceeds 31000 points at 5350MHz all core frequency but temps sta bellow 85c where it gets most boost.

Okay so if VRMs were bad I'd see a power limit somewhere and as a result temps below 95C?

Do you mean that you limit power delivery in bios at 180W? I use PPT = 230W

 

[CountMike]

Okay so if VRMs were bad I'd see a power limit somewhere and as a result temps below 95C?

Do you mean that you limit power delivery in bios at 180W? I use PPT = 225W

180W is designed power of this VRM. It's also default max power when left on auto. That's OK for 7900x which over 170W gains little except heat.
You can set PPT and and everything else to whatever you want but if it or CPU hits temperature barrier it will drop like a rock. Are you checking with HWInfo while running tests ?
You also have 2xCCDs and they are usually not equal, one could be better than other by few % and whole CPU real/effective performance will be that of lower CCD or just a bit better.

 

[catcream]

180W is designed power of this VRM. It's also default max power when left on auto. That's OK for 7900x which over 170W gains little except heat.
You can set PPT and and everything else to whatever you want but if it or CPU hits temperature barrier it will drop like a rock. Are you checking with HWIfo while running tests ?

Yes, CPU spikes to 95C and I get briefly get 200W PPT, then it drops and stays at 170W. To me this feels like my CPU block for some reason can only dissipate 170W.

 

[catcream]

180W is designed power of this VRM. It's also default max power when left on auto. That's OK for 7900x which over 170W gains little except heat.
You can set PPT and and everything else to whatever you want but if it or CPU hits temperature barrier it will drop like a rock. Are you checking with HWIfo while running tests ?

Here I have a graph of temp and PPT over time:

Hey, PPT seems to briefly reach 200W and then drops to 170W when running Cinebench. Temperature immediately goes to 95C. I run fans and pump at 100%.

I went into bios and manually set PPT = 230000mW, TDC = 160000mA, and EDC = 225000mA which can be seen in Ryzen Master.