imported_jjj
Senior member
- Feb 14, 2009
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The AGESA 1004 that is starting to be available does improve support at 3200MHz.
It seems like they have two separate updates in the pipeline, one enabling better support at 3200, and another one in May for even faster memory:Note that the message from AMD was about opening up more multipliers to achieve higher RAM speeds above 3200, not necessarily about better support for RAM.
http://www.tomshardware.co.uk/forum/id-3378010/join-tom-hardware-amd-thursday-april-6th/page-3.html- Ram is improving all the time. We have a huge BIOS update enabling 3200 MHz DDR4 that should hit most boards April 11th, and another one scheduled for May.
Those two things go hand in hand, but you are correct in that the May update only explicitly targeted higher multipliers. Better compatibility would be implied.Note that the message from AMD was about opening up more multipliers to achieve higher RAM speeds above 3200, not necessarily about better support for RAM.
Ah ok thanks for correcting me, bad recollection. I look forward to next BIOS update!It seems like they have two separate updates in the pipeline, one enabling better support at 3200, and another one in May for even faster memory:
http://www.tomshardware.co.uk/forum/id-3378010/join-tom-hardware-amd-thursday-april-6th/page-3.html
Unless the "3200" in that post is a typo and he meant to write 3600. But then April doesn't make sense, because that update is scheduled for May.
I have tried 2x8 GB Sticks @3200 on BIOS versions 0503/0513/0515/0605 and they all worked. They only one that did not work is the old BIOS version 0406.
DRAM voltage has to be 1.35V, and mode will be DOCP then select 3200.
Just keep in mind to recheck the other voltages especially CPU voltage since DOCP tries to raise core voltage also, at least that is what it seems to me.
I think I have Samsung B-dies as well. although I was never aware of these things and I just thought... hmm the Trident Z looks cool I will get them.
I actually hadn't heard about the April update until this AMA. It looks like it's going to coincide with the official release of the R5 on April 11, and AMD seem fairly confident that it will support 3200 MHz memory across the board.Ah ok thanks for correcting me, bad recollection. I look forward to next BIOS update!
No, you have Samsung B-Die sticks. Which is probably why you're able to run them at their rated 3200 speeds.This means my F4-3200C15D-16GTZ with 15-15-15-35 timings is not samsung b-die?
This RAM kits seems to be working well for me though at 3200 MT/s.
Trident-Z if you can afford it. I can't guarantee these kits but if you are looking for 2x8GB:I'm just unsure which RAM to go with it for good performance any recommendations. RGB would be nice or options of colours.
This is not true. I have a set of 2x8GB DDR4-3400 CL16 TridentZ which is not B-die, and is dual rank. 3200 CL14 is guaranteed B-die, as it is the only IC capable of that speed/latency combination. 3600 with 16-16-16-16-3x timings should also be B-die.Trident-Z if you can afford it. I can't guarantee these kits but if you are looking for 2x8GB:
http://pcpartpicker.com/products/memory/#s=403400,403466,403600,403666,403733,403866,404000,404133,404200,404266&Z=16384002&sort=a10
Start with those.Anything DDR4-3400 and higher SHOULD be Samsung B-die single-rank. After that it's just a matter of finding how much voltage you need to get where you want to go. Bear in mind that if you are buying G.Skill that the Trident-Z kits of the same speed/timings tend to be better than the equivalent Ripjaws. You might find some dual-rank in the Ripjaws even at these speeds.
I don't think there are any rules whatsoever in what G.skill are Samsung b-dieAnything with asymmetric timings such as 16-18-18-18-39 is NOT B-die.
We have internally observed good results from 2933, 3200, and 3500 MT/s rates with 16GB kits based on Samsung “B-die” memory chips. Potential kits include:
- G.Skill Trident Z - F4-3200C16D-16GTZR [16-18-18-36 @ 1.35v]
Didn't know they were shipping any 3400 non-B-die, but my DDR4-3733 17-19-19-42 is asymmetric and it is B-die.This is not true. I have a set of 2x8GB DDR4-3400 CL16 TridentZ which is not B-die, and is dual rank. 3200 CL14 is guaranteed B-die, as it is the only IC capable of that speed/latency combination. 3600 with 16-16-16-16-3x timings should also be B-die. Anything with asymmetric timings such as 16-18-18-18-39 is NOT B-die.
Well that throws a wrinkle into things, then. I suppose the only way to know for sure is to remove the heatspreader (e.g. my DDR4-3400 sticks are "E" die)Didn't know they were shipping any 3400 non-B-die, but my DDR4-3733 17-19-19-42 is asymmetric and it is B-die.
Or use Thaiphoon Burner. Here's the output for one of my DIMMs:Well that throws a wrinkle into things, then. I suppose the only way to know for sure is to remove the heatspreader (e.g. my DDR4-3400 sticks are "E" die)
Then that might explain why I can't hit 3200.I still have to see any samsung b-die OVER cas 14 that will do 3200 in any motherboard, please correct me if I am wrong. I have 2 sets of the cas 14, in 2 different motherboards, that both do 3200.
Yes, it appears at the moment with current motherboards and BIOS, the Ryzen CPU is very picky on memory. It will do rated speed only if the CPU "likes" that memory, and this is the only one I read that it really "likes".Then that might explain why I can't hit 3200.
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Mine will do it, which is interesting since it should not be able to do so well according to its bin. It should be restricted to CL/CAS15 (16 on Ryzen) but it does 14 anyway.I could be wrong, as I said, I just have not read anything other than 3200 samsung b-die, cas 14 that actually does 3200.
The memory has to be capable of doing those timings. Apparently yours isn't rated for that.Is there any real world benefit to setting my memory from its default 16-18-18-36 to 14-14-14-32?
Changing the timings in the BIOS was simple, and a quick 15 minutes of Prime95 was stable.
(I tried these timings per Marks suggestion that CAS 14 seemed to be a strong indicator for hitting 3200mhz; alas, these timings didn't help me hit 3200)
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Check memory latency in AIDA64, the diff is pretty relevant., maybe at about 4ns.It isn't rated for it, but it is running at those timings.
I just don't know if there is a real world performance benefit to running at these lower timings.
I assume this is related to open mem banks and bank or rank internal roundtrips abd timings.There are non-Samsung B-die on QVL lists at 3200 and in theory you can push lots of kits to 3200 with sufficiently relaxed timings.
One odd thing is that , for a reason i can't explain, populating all 4 DIMM slots might result in higher perf in actual apps...