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AMD Threadripper 2950X

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Markfw

CPU Moderator, VC&G Moderator, Elite Member
Super Moderator
May 16, 2002
20,521
8,383
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Question: Does buying 4 stick of memory put an X399 motherboard in 4-channel mode or are 8 sticks required? I believe with two sticks you are in 2 channel mode? Is my understanding correct?
Yes, you need 4 sticks for 4 channel mode. 8 sticks just gets you more memory, and a little less speed.
 

DrMrLordX

Lifer
Apr 27, 2000
16,345
5,258
136
I ended up buying the 2950x and the Gigabyte Aorus Xtreme X399 Motherboard. Absolutely no regrets. The entire setup is a dream.
Tell us more about your system. What kind of RAM did you use? What kind of overclocks are you getting? What cooling, etc?
 

Markfw

CPU Moderator, VC&G Moderator, Elite Member
Super Moderator
May 16, 2002
20,521
8,383
136
Question: Does buying 4 stick of memory put an X399 motherboard in 4-channel mode or are 8 sticks required? I believe with two sticks you are in 2 channel mode? Is my understanding correct?
TR is quad channel. You really need 4 sticks.
 
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Joseph Combs

Member
Jul 27, 2018
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Tell us more about your system. What kind of RAM did you use? What kind of overclocks are you getting? What cooling, etc?
System Specs:
GIGABYTE X399 AORUS XTREME sTR4 AMD X399 SATA 6Gb/s USB 3.1 Extended ATX AMD Motherboard
AMD 2nd Gen Ryzen Threadripper 2950X, 16-Core, 32-Thread, 4.4 GHz Max Boost (3.5 GHz Base), Socket sTR4 180W
G.SKILL TridentZ Series 32GB (4 x 8GB) 288-Pin DDR4 SDRAM DDR4 3200 (PC4 25600) Intel Z370 Platform Desktop F4-3200C14Q-32GTZ
Seasonic PRIME Ultra 850W 80+ Titanium Power Supply
SAMSUNG 970 EVO M.2 2280 1TB PCIe Gen3. X4, NVMe 1.3 64L V-NAND 3-bit MLC Internal Solid State Drive (SSD)
Arctic Freezer 33TR - Tower CPU Cooler for AMD Ryzen Threadripper sTR4 -WHITE

No Overclocking yet .....
 

DrMrLordX

Lifer
Apr 27, 2000
16,345
5,258
136
Not bad. Was kinda hoping you'd use faster RAM but that's okay. Not everyone wants to buy DDR4-4266 or whatever (heh).

Really I just wanted to see how fast that IMC could go. You have the DIMM config I would want for such a system otherwise.

I am still interested in how that HSF is going to do on your 2950x.
 

Joseph Combs

Member
Jul 27, 2018
72
12
16
Not bad. Was kinda hoping you'd use faster RAM but that's okay. Not everyone wants to buy DDR4-4266 or whatever (heh).

Really I just wanted to see how fast that IMC could go. You have the DIMM config I would want for such a system otherwise.

I am still interested in how that HSF is going to do on your 2950x.
I chose to go with lower latency rather than higher mhz. More bang for the buck I believe.
 
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lopri

Elite Member
Jul 27, 2002
12,841
325
126
Want to know how it overclocks. Is bus overclocking still a thing these days?
 

DrMrLordX

Lifer
Apr 27, 2000
16,345
5,258
136
I chose to go with lower latency rather than higher mhz. More bang for the buck I believe.
Higher MHz = lower latency, often times. What you are thinking about is lower timings. But on a 2950x, higher Mhz also = higher IF speeds. Hitting DDR4-4000 reliably is sort of a "holy grail" for Ryzen and Threadripper users, at least for now. Not sure if Zen2 will change that any.
 

Topweasel

Diamond Member
Oct 19, 2000
5,327
1,525
136
Higher MHz = lower latency, often times. What you are thinking about is lower timings. But on a 2950x, higher Mhz also = higher IF speeds. Hitting DDR4-4000 reliably is sort of a "holy grail" for Ryzen and Threadripper users, at least for now. Not sure if Zen2 will change that any.
It's usually a Wash. CL latency and clock speed determine actual latency. The advantage of a higher clock speed on Ryzen usually wins out do to it beefing up IF performance and latency.
 

Joseph Combs

Member
Jul 27, 2018
72
12
16
Not bad. Was kinda hoping you'd use faster RAM but that's okay. Not everyone wants to buy DDR4-4266 or whatever (heh).

Really I just wanted to see how fast that IMC could go. You have the DIMM config I would want for such a system otherwise.

I am still interested in how that HSF is going to do on your 2950x.


Here are the Passmark results, no overclocking.

PassMark.png
 
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