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ASUS ROG Zenith Extreme X399 ThreadRipper Overclocking / Support - Page 121

post #1201 of 2026
Quote:
Originally Posted by The Stilt View Post

=< 1.35V for sustained use, under full stress.
IMO anything higher than 1.250V on Threadripper is sheer insanity, considering the power draw of these parts.
My CPU at 3.7GHz / 1.150V is drawing 220W of power during Prime95. Considering the scaling of these parts at 1.250V the power consumption would be around 300W.


Wait seriously?
=< 1.35v?


I thought AMD themselves said 1.375v max.

Also.... isn't power draw correlated to your cooler's ability? If you can keep temps under control,
(=<68c) 1.4vcore should be fine no?
post #1202 of 2026
Quote:
Originally Posted by happyluckbox View Post

Yeah if you're aiming for just 32gb that should be a very solid kit. I'm using a 128gb kit of similar ram.

I'll never need to go over 64GB so 32 for 4 slots is a good start for me, if needed i can just buy another kit down the road and populate all 8 slots to get 64GB
post #1203 of 2026
Would 64GB (8x8) change the needed items or is the F4-3200C14Q-64GTZR still sufficient?
post #1204 of 2026
My understanding is that you want to get the Samsung B die memory and this kit is guaranteed to be a Samsung B die from what people say here. So I don't think it will change the kit itself. its just a matter of getting 8x 16GB sticks instead of 8x8GB
post #1205 of 2026
Hey


im at 4.1@1.439v OC w/3466 1.38v right now with high temp @ 56c. playing BF one fullload,

Vcore set @ offset
+
0.2658v

SOC offset
1.138v
+
0.1250v

SOC 1.286v <--is this to high on the SOC

My vcore is jumping up and down 1.228v to 1.438v

Snow
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Snow
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post #1206 of 2026
Way too high.
post #1207 of 2026
Quote:
Originally Posted by happyluckbox View Post

Way too high.


What would be the correct range
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Snow
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post #1208 of 2026
Quote:
Originally Posted by TrixX View Post

Quote:
Originally Posted by ENTERPRISE View Post

Im hoping the next BIOS update brings a good few fixes and optimisations. Here's to hoping !
Indeed here's hoping there is a next BIOS, it's been a while since 801 came out wink.gif

Quote:
Originally Posted by jarble View Post

Quote:
Originally Posted by TrixX View Post

Indeed here's hoping there is a next BIOS, it's been a while since 801 came out wink.gif

I hope we see at least one more bios update and an update to the AI-suite as there are still some bugs running around. My biggest gripe right now is fan control is very temperamental

Yeah it has been a while actually. As for fan control I agree, there are definitely some bugs there with setting fan profiles.
post #1209 of 2026
Quote:
Originally Posted by ENTERPRISE View Post




Yeah it has been a while actually. As for fan control I agree, there are definitely some bugs there with setting fan profiles.

Yeah having to set it to PWM, then save and reset before getting manual control enough to set the manual limits and curve is quite frustrating. I haven't used Ai Suite 3 yet though.
    
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post #1210 of 2026
Update on adventures in 128gb land. Options were:

KIT #1: 2 x 64GB = 2 x F4-3200C14Q-64GTZR. (DDR4-3200, CL 14-14-14-34 1.35 V)
KIT #2: 128GB = F4-2933C16Q2-128GTZRX. (DDR4-2933, CL 16-16-16-36, 1.35V)
KIT #3: 128GB = F4-2933C14Q2-128GTZRX. (DDR4-2933, CL 14-14-14-34, 1.35V)

The 128gb kits are no longer for sale, but you can see the sales page for my kit #2 here: https://www.newegg.com/Product/Product.aspx?Item=N82E16820232631 . Kits #2 and #3 were offered to me by Gskill tech as X399-specific kits, and Kit #1 was just a few 64gb kits at 3200mhz put together. I tested kits #1 and #2, having tested #2 before it vanished from Newegg. #3 already wasn't available at Newegg at my time of purchase. Gskill later confirmed that the SKU no longer existed, and wasn't just out of stock. And now, two days later, Kit #2 is listed the same way. Interesting, but why? More on that later. Lets look at how the kits behaved.

Both kits are Samsung B die, and some will recognize the first as the 64 gb version of the 32 gb kit everyone is recommending in the forum. Sequentially booted 1,2,4,6,8 sticks of each kit, cycling from 16gb to 128 gb. Both kits provided full 3200 Mhz speed up through 4 sticks. Yes, that wasn't a typo. The 2933mhz kit was working and stable at 3200mhz simply by using the 3200mhz timings. Wait, could Gskill be using faster RAM in these kits and just be labeling them 2933 for some reason? Hmm...

Once 6 sticks were used, everything dropped back to 2933 mhz. Using all 8 sticks, the 2933mhz Kit #2 was working basically "plug and play", dropping them in and using D.O.C.P. But the 64gb x 2 Kit #1, to replicate the same speed at its slightly advanced timings, required using D.O.C.P., then pulling back the Memory Frequency to 2933 MHz.

So Gskill's logic in creating the #2 and #3 128gb kits for X399 makes more sense. Accepting that 2933 Mhz was simply the highest possible stable memory clock for 128 gig to work properly with infinity fabric, Gskill may have just tried to save the user the time tinkering, set the kits to 2933 MHz, but used better Ram to ensure a very easy process for the 128 gb buyer.

Ok, if that's the case, then why drop the kits? Why are those two SKUs now unavailable? It could be a few reasons. They weren't selling enough of them at 1500 a pop, or users were balking at paying an X399 premium for 2933mhz memory, when 2 64 gig kits of 3200mhz memory was only $40 more, a pittance in the 1500 range. But buying 3200mhz memory to fill 128 gb on X399 is simply wasting money, because it cannot and will not reach those speeds due to limits of the Ryzen architecture.

So which way do you go? Well, testing showed something interesting when I benchmarked Kit #1 at 2933mhz with its C14 timings against Kit #2 at 2933mhz, also using the C14 timings, not its native C16. Using AIDA64 memory bench (averages (SD) based on n=5 runs):

Kit #1: Read: 71793.8 (280.82), Write: 74122 (697.32), Copy: 73288.6 (291.41), Latency: 97.36 ns (.149)
Kit #2: Read: 71002.2 (420.20),Write: 73735.4 (387.57), Copy: 72521.2 (437.84), Latency: 101.36 ns (.287)

Not really surprising, the faster binned memory performs ever so slightly better than lesser memory operating at the tighter timings. And so the question of why 128 gb 2933gb kits were quickly made extinct by Gskill has an answer: no one in their right mind would buy them. Buying them is essentially saying you are accepting reduced performance RAM (2933 MHz) for ease of configuration over usability beyond the life of the X399 motherboard. In other words, once you move 3200mhz memory off X399, where the 2933mhz limit imposed by infinity fabric no longer applies, all the performance typical of fast RAM will be present. The X399-specific Sku's seem to be slightly better than their listed timings, to ensure a strong chance of plug and play operation. I kinda wish I could get a hold of the C14 2933mhz kit, to see how tight the timings could be pushed.

TLDR: If you want 128GB for your X399 board, buy 3200mhz C14. Avoid any kits rated at 2933mhz.
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