X570 Tomahawk - Cannot run 4x sticks of Corsair Vengeance RGB PRO 32GB (2x 2 x 16GB) DDR4 3600MHz C18

Blonkster

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I bought an X570 Tomahawk for a new build with a 5900x (not yet arrived), but have bought a 3200G to build and test the PC while I wait.

I have flashed the BIOS to the latest Beta - 151, which was a PITA as it initially failed after a couple of minutes, but is now flashed and the BIOS reset. I can't believe how picky it is about the flash-drive used!

I have 4 x 16GB sticks of the above RAM but it will not run them all at the correct speed. they are from 2 kits and either kit will work in slots 2 and 4, as will any combination of sticks from the kits at 3600Mhz C18 and even C16, however I cannot get all 4 sticks working.
At one point I got the board to boot with them at 3200Mhz but can't do that now , so have reverted to 2 x 16Gb sticks as 3600.

I get memory errors (3 beeps) and have to reset the bios when I try to get all 4 sticks at a decent speed.

Do anybody have 64GB of RAM working, particularly the Corsair RGB? I have wasted all day trying to get this working with 4 sticks, and I'm ready to send two back or swap the board for a different manufacturer's ,as I have found lots of issues on forums related to this board but not so many for others.

Its my first AMD build in over 10 years, coming from an i5 2500k , which has run perfectly on an MSi board, but I fear the quality, at least the BIOS , is not what it used to be!

Any advice would be appreciated before I RMA it.
 

newlin9

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You have 2 things working against you on those 4x16gb sticks.

1) Running densities higher than 8gb in a 4x tandem run (8x8x8x8) is the optimum configuration for AMD. DRAM densities higher than that in a 4x tandem row are prone to throw CRC errors.
2) You are running 2 16gb sticks (32gb kit) from 2 separate DRAM/KIT batches. Unless you purchase ALL from the same PRODUCTION DRAM BATCH straight from the point of manufacture, made on the SAME DAY, at the SAME TIME, and in the SAME SEQUENCE of production, and PAIRED and SOLD as a WHOLE DRAM KIT. Otherwise, the manufacturer will NOT guarantee 100% functionality. That is why they sell them in DRAM KITS, i.e., 4x8 / 2x16 / 4x16 / 2x32 etc.

The best you will probably get (and there is nothing whatsoever wrong with it) running all 4 of those 16gb sticks (from two different RUN batches) is going to be 3200, and you will have to set that IN THE BIOS, or you will continue to have DRAM errors.

Use all 4, set DRAM manually within BIOS to 3200 / 1600 and those errors should go away, getting you ready for your 5900X. The Zen3 / 5900X BIOS is going to be even MORE prone to throw errors without you HARD SETTING the DRAM speed within the BIOS to 3200 as well. Zen3 AGESA FABRIC has got a long way to go on DRAM compatibility refinements before the dust settles on it. Probably more than Zen2, if the first two weeks after launch of Zen3 tells us anything.
 
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RemusM

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I bought an X570 Tomahawk for a new build with a 5900x (not yet arrived), but have bought a 3200G to build and test the PC while I wait.

I have 4 x 16GB sticks of the above RAM but it will not run them all at the correct speed. they are from 2 kits and either kit will work in slots 2 and 4, as will any combination of sticks from the kits at 3600Mhz C18 and even C16, however I cannot get all 4 sticks working.
At one point I got the board to boot with them at 3200Mhz but can't do that now , so have reverted to 2 x 16Gb sticks as 3600.

I get memory errors (3 beeps) and have to reset the bios when I try to get all 4 sticks at a decent speed.
https://www.amd.com/en/products/apu/amd-ryzen-3-3200g

System Memory Specification : Up to 2933MHz
Memory Channels : 2


Not only that you run the CPU IMC out of specs, but you also mix memory modules (or kits).
If you like gambling, you need to raise the voltages and/or to relax the timings.
:beerchug:
 

Alan J T

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Humm Interesting I do not have a problem running 4x16 dims but I chose 3200 and asked my Supplier to Serial match the two, two ram kits I got and they did good as I got sequential serial Numbers.

So you can do it but you need to get same batch with serial numbers as close as possible.
 

newlin9

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Humm Interesting I do not have a problem running 4x16 dims but I chose 3200 and asked my Supplier to Serial match the two, two ram kits I got and they did good as I got sequential serial Numbers.

So you can do it but you need to get same batch with serial numbers as close as possible.
=============================

Blonkster (OP) should also pay attention to seat/place 2 (matching) sticks in DRAM SLOTS 1 and 3 and the other 2 (matching) sticks in DRAM SLOTS 2 and 4. :emot-tip-wink:
 

Blonkster

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Thanks to you all for your replies, particularly newlin9.

To summarise..

- yes, different batches of RAM are likely to be a lot of the problem here, but I got them from two different online suppliers as they were out of stock at my usual place and was going to send one set back but decided to keep them both - I wish I hadn't ! I have just checked and the are significantly different, one set is v5.49 and the other set (from Amazon) are v3.31. I may get the Amazon set exchanged to see if I can get closer to 5.49 - worth a try?

- I have always kept the RAM from the same set in the correct sockets/channels.

- the RAM speed limitation of the 3200G is interesting, is there more chance of pushing towards 3600Mhz with a 5900x, or it the batch issue above always going to be a problem?

- I'm now running at 3200Mhz C16. However I bought 3600 to match the fabric speed of the 5900x - 1800mhz. Are there likely to be any visible performance difference between running at 3200 vs 3660 Mhz? Probably not unless bench marking, but I feel cheated out of my 400Hz with my 'optimized for Ryzen' RAM :-(

I hope to get my 5900x in the next couple of weeks (number 303 in the queue at Scan) so will keep my RAM until then and if no better results consider returning a set or living with my missing 400hz, assuming there are no 5000 series bugs lurking in the BIOS!
 

laurence1211

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Thanks to you all for your replies, particularly newlin9.

To summarise..

- yes, different batches of RAM are likely to be a lot of the problem here, but I got them from two different online suppliers as they were out of stock at my usual place and was going to send one set back but decided to keep them both - I wish I hadn't ! I have just checked and the are significantly different, one set is v5.49 and the other set (from Amazon) are v3.31. I may get the Amazon set exchanged to see if I can get closer to 5.49 - worth a try?

- I have always kept the RAM from the same set in the correct sockets/channels.

- the RAM speed limitation of the 3200G is interesting, is there more chance of pushing towards 3600Mhz with a 5900x, or it the batch issue above always going to be a problem?

- I'm now running at 3200Mhz C16. However I bought 3600 to match the fabric speed of the 5900x - 1800mhz. Are there likely to be any visible performance difference between running at 3200 vs 3660 Mhz? Probably not unless bench marking, but I feel cheated out of my 400Hz with my 'optimized for Ryzen' RAM :-(

I hope to get my 5900x in the next couple of weeks (number 303 in the queue at Scan) so will keep my RAM until then and if no better results consider returning a set or living with my missing 400hz, assuming there are no 5000 series bugs lurking in the BIOS!
The 5900x will run 3600mhz no problems but mis matching ram will hurt you a lot. Ram speed matters as well as ram timings. The difference is up to 20% in games and that's on zen2. Zen3 will respond similarly. Personally I'd only run one kit unless you need 64gb for work. The other thing is zen3 at the moment likes 4 dims over two. Whether that will stay that way will depend on AMD and it's currently buggy agesa code. So in short you don't have the best ram choice, choose your compromise.
 
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