Ryzen 3950X Build Help

[gadgetgeek]

Hmm, will it? only 1 channel

I mean two of 32GB each,its cheap comparatively.

 

[erek]

anyone able to find a 3950X for sale earlier than Nov 25th?

 

[Solid State Soul ( SSS )]

For the ram I would recommend buying the Trident Z NEO, it is the latest series by G skill designed specifically for Ryzen 3 to guarantee hassle free compatibility.

 

[erek]

For the ram I would recommend buying the Trident Z NEO, it is the latest series by G skill designed specifically for Ryzen 3 to guarantee hassle free compatibility.

Thank you,

here's the rig details so far including the Trident Z Neos:

Corsair AX1200 | Western Digital Black 6TB | NVIDIA GeForce RTX 2080 Ti FE | LG - 27UD68-P 4K IPS | Corsair H115i RGB AIO Water Cooler | Inland 1TB NVMe M.2 (Phison E12 Controller) | G.SKILL Trident Z Neo (For AMD Ryzen) Series 32GB (2 x 16GB) | Fractal Design Define R6 | Asus ROG X570 Crosshair VIII Hero | Ryzen 9 3950X

 

[moproblems99]

For the ram I would recommend buying the Trident Z NEO, it is the latest series by G skill designed specifically for Ryzen 3 to guarantee hassle free compatibility.

Outside of Corsair, which there still seems to be something funky in their implementation of something, there is as much importance to the IMC inside the chip as the ram itself. If you get a good IMC, you are almost guaranteed to be able to run 3800/1900 on any ram. If you get an average chip, you can run 3600/1800. Get a poor chip, you are running 3200/1600. I know one other person that has the identical Neo ram sets that I have (3600 cl16) and I can do 3800/1900 where he can only do 3200/1600.

 

[Calmmo]

I mean it could be that 3950x's go through a super tight binning process that even IF is top tier, but just don't go in expecting golden sample "set and forget" 1900 IF.
And from very recent personal experience my 32gb quad rank 2 stick/dual channel B-Die Neos wouldn't work out of the box with XMP with all but the now official final 1.0.0.4 b agesa.
Tested 2 different kits none of which worked before, suddenly gigabyte F10 final comes out and its all good on both.. Go figure. (they were PVR416G360C6K and F4-3600C16D-32GTZN)

 

[Solid State Soul ( SSS )]

Thank you,

here's the rig details so far including the Trident Z Neos:

Corsair AX1200 | Western Digital Black 6TB | NVIDIA GeForce RTX 2080 Ti FE | LG - 27UD68-P 4K IPS | Corsair H115i RGB AIO Water Cooler | Inland 1TB NVMe M.2 (Phison E12 Controller) | G.SKILL Trident Z Neo (For AMD Ryzen) Series 32GB (2 x 16GB) | Fractal Design Define R6 | Asus ROG X570 Crosshair VIII Hero | Ryzen 9 3950X

Everything looks great, part selection seems solid for a high end build including the monitor, only thing left to add is the RGB bling

 

[erek]

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[notb]

Corsair AX1200 | Western Digital Black 6TB | NVIDIA GeForce RTX 2080 Ti FE | LG - 27UD68-P 4K IPS | Corsair H115i RGB AIO Water Cooler | Inland 1TB NVMe M.2 (Phison E12 Controller) | G.SKILL Trident Z Neo (For AMD Ryzen) Series 32GB (2 x 16GB) | Fractal Design Define R6 | Asus ROG X570 Crosshair VIII Hero | Ryzen 9 3950X

Honestly, since you're not limited by the case and (clearly) not by budget, haven't you thought about a more potent AiO? Some 360mm perhaps?

 

[erek]

Honestly, since you're not limited by the case and (clearly) not by budget, haven't you thought about a more potent AiO? Some 360mm perhaps?

In terms of budget, to explain:

All of these components are carrying over from my current rig:

[Corsair AX1200 | Western Digital Black 6TB | NVIDIA GeForce RTX 2080 Ti FE | LG - 27UD68-P 4K IPS]


All of these components i bought recently:

[Corsair H115i RGB AIO Water Cooler | Inland 1TB NVMe M.2 (Phison E12 Controller) | G.SKILL Trident Z Neo (For AMD Ryzen) Series 32GB (2 x 16GB) 3600 MHz 16-19-19-39| Fractal Design Define R6 | Asus ROG X570 Crosshair VIII Hero]

So I got the Corsair H115i RGB AIO 280mm for relatively cheap (at the time)

 

[notb]

So I got the Corsair H115i RGB AIO 280mm for relatively cheap (at the time)

Well all right - if you already have this AiO, use it.
Thing is though: you're getting a CPU with a very high heat concentration and it's not fully optimized yet, i.e. it may get faster and hotter with updates.

If you're just going to game and you wanted this CPU for fun, it'll be fine.
But if you're thinking about long time all-core load (some computing tasks, some video processing etc), those 140mm fans may end up running near 2000 rpm max and this will NOT be pleasant.

Honestly, with this new era of high-core 7/10nm CPUs, cooling will become an issue. I just hope Peltier coolers are not coming back...

 

[erek]

Well all right - if you already have this AiO, use it.
Thing is though: you're getting a CPU with a very high heat concentration and it's not fully optimized yet, i.e. it may get faster and hotter with updates.

If you're just going to game and you wanted this CPU for fun, it'll be fine.
But if you're thinking about long time all-core load (some computing tasks, some video processing etc), those 140mm fans may end up running near 2000 rpm max and this will NOT be pleasant.

Honestly, with this new era of high-core 7/10nm CPUs, cooling will become an issue. I just hope Peltier coolers are not coming back...

Even if i don't overclock?

 

[mstenholm]

Even if i don't overclock?

I, obviously, don't have a 3950x yet but my 3900x running pure stock and 100% 24/7 struggles to stay below 70 C and that is with a 480 mm radiator placed in a 20 degree room (outside the case). You will hear your rad fans if you try to copy that load.

 

[TheLostSwede]

Even if i don't overclock?

Yes, the problem is that the cores jumps up and down a lot and as such, even on my now "simple" eight core CPU, the temperatures can jump from 35 to 65 degrees C, in the blink of an eye. Imagine how 16 cores will behave...
Obviously they drop back down quite quickly as well, but by now, you've already raised the starting thermal point, so the next time you load up all cores, it's going to hit the higher temperatures faster. Under sustained load, my CPU runs at 70-75 degrees C using the same or similar cooler to yours. The new ones are actually not as good as their older ones from what I can tell, although they're also not as noisy...

 

[mstenholm]

Yes, the problem is that the cores jumps up and down a lot and as such, even on my now "simple" eight core CPU, the temperatures can jump from 35 to 65 degrees C in the blink of an eye. Imagine how 16 cores will behave...

Better keep the load at 100 %, the jumps still gets me worried

 

[erek]

I, obviously, don't have a 3950x yet but my 3900x running pure stock and 100% 24/7 struggles to stay below 70 C and that is with a 480 mm radiator placed in a 20 degree room (outside the case). You will hear your rad fans if you try to copy that load.

That's insane, 70C with 480mm radiator?

What in the world?

 

[mstenholm]

That's insane, 70C with 480mm radiator?

What in the world?

OK, fans are not running fast, I have a 3-way splitter running slow and one running at a more normal 1200 rpm. I still haven't bothered to optimize/figure out their speed.

 

[erek]

OK, fans are not running fast, I have a 3-way splitter running slow and one running at a more normal 1200 rpm. I still haven't bothered to optimize/figure out their speed.

Sanity check on 3900x heat issues...

Ok, I am building two 3900x rigs to replace two i7-6700k rigs that I used with Cooler Master V8 GTS High Performance CPU Coolers (Vapor Chambers) for several years.. Went AMD for the first time in 15 years.... I am used to temps (and space heaters as it were) that are pretty low/cool... So I...

hardforum.com

 

[mstenholm]

Sanity check on 3900x heat issues...

Ok, I am building two 3900x rigs to replace two i7-6700k rigs that I used with Cooler Master V8 GTS High Performance CPU Coolers (Vapor Chambers) for several years.. Went AMD for the first time in 15 years.... I am used to temps (and space heaters as it were) that are pretty low/cool... So I...

hardforum.com

Well temperatures seems to be a mixed bag but in general these chips are hard to keep cool. Below is a 6 hour run at 96% load.

 

[erek]

Well temperatures seems to be a mixed bag but in general these chips are hard to keep cool. Below is a 6 hour run at 96% load. View attachment 137476

you got fans on that 480mm radiator, right?

 

[mstenholm]

you got fans on that 480mm radiator, right?

Sure, but as I wrote I'm not 100 % sure about the speed. The Noctua NF A12 runs with a low noise resistor so I think that is around 1700 rpm, the three Noiseblockers (can't really remember their real name) is low speed. 27 C exit air from the Noctua and the rad is not warm.

 

[erek]

Sure, but as I wrote I'm not 100 % sure about the speed. The Noctua NF A12 runs with a low noise resistor so I think that is around 1700 rpm, the three Noiseblockers (can't really remember their real name) is low speed. 27 C exit air from the Noctua and the rad is not warm.

3900X With Corsair H115i hitting 90-95C ☹️

Hello ? I recently upgraded my computer and I thought everything was fine but my temps while playing games and benchmarks are getting really really hot. I have that ryzen master program and it shows my temps are around 35-40 when browsing but as soon as I start a game or benchmark it’s hitting 80...

linustechtips.com

 

[notb]

3900X With Corsair H115i hitting 90-95C ☹️

Hello ? I recently upgraded my computer and I thought everything was fine but my temps while playing games and benchmarks are getting really really hot. I have that ryzen master program and it shows my temps are around 35-40 when browsing but as soon as I start a game or benchmark it’s hitting 80...

linustechtips.com

Don't focus too much on someone's posts. People don't know how to build PCs or have bad airflow. Just look at some discussions on this forum.

This is a good reference point:

AMD Ryzen 9 3950X CPU Review - KitGuru

The wait is over for AMD's eagerly anticipated 16-core Ryzen 9 3950X processor. Slotting into the AM

www.kitguru.net

They've measured normal boost and PBO, 24*C ambient. With PBO on they got 79*C. During hot summer that +55*C rise will take it very close to the limit of 95*C. Without PBO it should be OK, but it would be interesting to see what the CPU does at 85*C+ (how much performance it decides to sacrifice).

KitGuru used a 240mm Corsair H100X, but they fixed their fans at 2435 rpm, which IMO just isn't acceptable in a home PC.
You have a larger radiator and larger fans, but I'm afraid their 2000 rpm limit will be utilized occasionally...

And of course there's a group enthusiasts who just can't tolerate this kind of temperatures, because they got used to 60-70*C under load. They will have to adjust to the 7nm era.

 

[erek]

https://www.reddit.com/r/Amd/comments/e0h5fp

 

[notb]

Well, yes. It was a paper launch more or less. AMD didn't even send samples to some major review sites (like TPU) or contributors (like the guy who makes the popular RAM calculator).

You may have to wait for another few weeks (maybe months...).

3900X became easily available around the end of September - slightly over 2.5 months after launch.