Also for reference in regards to Ryzen 3000 series on RAM speeds, you may find this post on Reddit informative.
Ryzen
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Stereodude
Not really a
They look to be about 2-3x what that amount of DDR4-3200 should cost. What am I missing?I personally don't need 32GB DIMMs so I was considering going with a pair of these:
Stereodude
Not really a
It looks like 3600 CAS16 is a better performer than 3200 CAS14, but not even all the different sites' tests of Ryzen 3xxx for memory performance come to the same conclusions.
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Ryzen Above: Best Memory Settings for AMD's 3000 CPUs, Tested
Is Ryzen 3000 optimized for DDR4-3200? What if we want more? We examine everything from frequency to rank count to nail down optimal settings.
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stub Memory speed on Ryzen has always been a hot subject, with AMD’s 1000 and 2000 series CPUs responding favorably to fast memory while at the same time having difficulty getting past 3200MHz in Gen1. The new Ryzen 3000 chips officially support memory speeds up to 3200MHz and can reliably run...
3600 CAS16 makes sense, the timings are very close to 3200 CAS14 which is why I was looking at 3200 C14 modules.
3200C14: 8.75ns
3600C16: 8.88ns
My interests wasn't to get the performance to the nth degree, I'm mainly interested in stability and maybe a chance that the XMP profile might work for once.
This might be the cheapest I've seen for a 3600C16 in 2 x 16GB for $160:
pcpartpicker.com
Not sure how comfortable I am with gskill for stability.
3200C14: 8.75ns
3600C16: 8.88ns
My interests wasn't to get the performance to the nth degree, I'm mainly interested in stability and maybe a chance that the XMP profile might work for once.
This might be the cheapest I've seen for a 3600C16 in 2 x 16GB for $160:
G.Skill Trident Z Neo 32 GB (2 x 16 GB) DDR4-3600 CL16 Memory
pcpartpicker.com
Not sure how comfortable I am with gskill for stability.
Stereodude
Not really a
I wouldn't have any concerns myself. They have two different CAS16 options (16-16-16-36 & 16-19-19-39). I don't know which CAS16 flavor is representative of what was used in those articles.This might be the cheapest I've seen for a 3600C16 in 2 x 16GB for $160:
G.Skill Trident Z Neo 32 GB (2 x 16 GB) DDR4-3600 CL16 Memory
Not sure how comfortable I am with gskill for stability.
Here's the other CAS16 kit:
G.Skill Trident Z Neo 32 GB (2 x 16 GB) DDR4-3600 CL16 Memory
pcpartpicker.com
According to PC Parts Picker no one else makes 2x16GB kits of CAS16 DDR4-3600 other than G.Skill.
Me and my buddy both ordered the ASRock Taichi x570 while it's on sale at Newegg. This is the lowest I've seen it so far at $259.99 with an additional $20 rebate. If I can find a 3950X I'll go that route.
Stereodude
Not really a
That looks like a pretty good choice for the MoBo.
Would you consider anything less?
I don't understand where the M.2 SSDs are located? Are they hidden under the board? It seems that a lot of breakdown/reassembly would be needed every time they are swapped.
Stereodude
Not really a
And how often are you doing that?
I would rarely replace an M.2 SSD so I'm not worried. I have an existing Samsung 970 EVO that I never did anything with from last year that will go in there. All three M.2 slots are located under the metal shroud per the docs.Would you consider anything less?
I don't understand where the M.2 SSDs are located? Are they hidden under the board? It seems that a lot of breakdown/reassembly would be needed every time they are swapped.
Stereodude
Not really a
I don't think you'll be able to buy it online though, so your plan is to head to the store ASAP after getting the alert?
Stereodude
Not really a
I'm pretty sure it will be different. High demand items aren't available for purchase online even if they're in stock in store. Like right now for me the 3900X is in stock in my local store, but I can't buy it online. The Rpi 4 was that way too when it first came out.
Well, maybe that's true now for the 3950X but it wasn't true the day it released. I had one in my shopping cart to buy for pickup but got distracted by other stuff before ordering and it sold out. That's why I was going on the premise I should be able to do the same now.
If it does show up in stock, I could drive over during a lunch break and see if I can snag one.
If it does show up in stock, I could drive over during a lunch break and see if I can snag one.
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Stereodude
Not really a
This review is a bit puzzling...
The 3600-16 is the fastest in the synthetic benchmarks, but the 3200-14 performs better in games and actual tests. Maybe having 32GB makes a big difference in the non-synthetic benchmarks?
The 3600-16 is the fastest in the synthetic benchmarks, but the 3200-14 performs better in games and actual tests. Maybe having 32GB makes a big difference in the non-synthetic benchmarks?
That is intriguing for sure. Would have been nice to have a fourth comparison of the G.Skill Trident 3200 CL14 in 2 x 8GB rather than just the 2 x 16GB. It's unclear if the system test advantage is due to the increased capacity or possibly something to do with the CL14 (8.75ns) very tiny latency advantage versus the 3600 CL16 (8.88). I do doubt that a difference of that amount would make this kind of difference.
The size difference may be more a factor of how the Windows OS deals with compression/page cache management, etc from the software running the tasks when there is excess free memory whereas the synthetics may be built to avoid using those OS benefits to keep things more consistent.
The size difference may be more a factor of how the Windows OS deals with compression/page cache management, etc from the software running the tasks when there is excess free memory whereas the synthetics may be built to avoid using those OS benefits to keep things more consistent.
sdbardwick
Storage is cool
16GB modules might be dual-rank; I know that in memory intensive situations that can make a measurable difference. IME under Prime95 dual-rank is worth more than reducing CAS by 2.
I checked on G.Skill's website but can't find that detail on these sticks of RAM.
Stereodude
Not really a
Stereodude
Not really a
You're saying dual rank is better for performance vs. single rank?
sdbardwick
Storage is cool
Yes. DR is better than SR.
At least in memory-bottlenecked situations. Prime95 is memory bound (since AVX instructions appeared), so the hardcore users spend much effort on memory optimization. Some trustworthy users report gains >10% with DR vs. SR (in an application where single digit percentage gains are considered worthwhile); I have noted increases >5% with no effort beyond replacing SR with DR (I am no longer one of the hardcore Prime95 users).
For additional gains, using 2 DIMMs per memory channel (2DPC) also improves throughput.
At least in memory-bottlenecked situations. Prime95 is memory bound (since AVX instructions appeared), so the hardcore users spend much effort on memory optimization. Some trustworthy users report gains >10% with DR vs. SR (in an application where single digit percentage gains are considered worthwhile); I have noted increases >5% with no effort beyond replacing SR with DR (I am no longer one of the hardcore Prime95 users
).For additional gains, using 2 DIMMs per memory channel (2DPC) also improves throughput.
That's surprising DR is faster than SR in your example. I thought dual rank memory had to share the data bus, one per rank which seems to imply a bottleneck. Is the DR performance benefit only when multiple channels are used?
sdbardwick
Storage is cool
As it was explained to me, DR enables what amounts to low-level interleaving, like in channel level interleaving.
More info: https://en.wikipedia.org/wiki/Memory_rank
The wiki article states there may be a performance penalty with multiple ranks, just after it describes a performance benefit; I think that means the effect of SR vs. DR will be workload/memory access pattern dependent.
I can't answer the single vs multiple channel question; always on multiple channels.
I now wonder if the 2DPC really only provides benefits with SR modules, as they become the functional equivalent of a single DR module.
ETA: All of my comments are concerning DDR4 only. I have no idea if they apply to DDR3 and earlier, as DDR4's interface/protocols are significantly different. And I never personally tested various rank or DIMM combinations back then.
More info: https://en.wikipedia.org/wiki/Memory_rank
The wiki article states there may be a performance penalty with multiple ranks, just after it describes a performance benefit; I think that means the effect of SR vs. DR will be workload/memory access pattern dependent.
I can't answer the single vs multiple channel question; always on multiple channels.
I now wonder if the 2DPC really only provides benefits with SR modules, as they become the functional equivalent of a single DR module.
ETA: All of my comments are concerning DDR4 only. I have no idea if they apply to DDR3 and earlier, as DDR4's interface/protocols are significantly different. And I never personally tested various rank or DIMM combinations back then.
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Stereodude
Not really a
Are you using nowinstock.net?
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Looking for a hard to find AMD CPU but coming up empty handed? Our AMD Computer Processor In Stock Tracker may be able to help.
www.nowinstock.net
I'm holding off a little bit on my build.
Stereodude
Not really a
I don't think they do.
Probably the best solution is to make friends with the Microcenter employee who checks in new inventory and get them to set one aside for you or give you a heads-up that they're entering them into their system (when they get them) so you can basically be there waiting for it when you can buy one.
Stereodude
Not really a
Supply and demand at work. They can charge whatever they want. We don't have to buy it.B&H is selling the 3950X with a nice up charge of $1100.My Now In Stock alert doesn't even alert me it's that bad.
Yeah, they are all full of it.
What is the Apple-Mac doing lately, some kind of Chinese CPUs?Stereodude
Not really a
That's one way to look at it. We have no idea how much stock they had. Lots of products sell out at product introduction. Even things from really big companies like Apple.AMD is full of it. They launched a product with very limited stock.
You could also take the alternative perspective that they are just selling it far too cheaply.