Aurora R8, Corsair Dominator Platinum RGB Memory

I thought the R7 and R8 boards could only support 2933.  Regardless, the memory would have been downclocked by the board.  Not sure why you can't get the 4th stick to work.  Must be something funky with the BIOS... again. Perhaps they don't fully support that particular line of Corsair RAM. With the R7, I believe it was BIOS version 1.0.17 or 1.0.18 that recently introduced extended support for Kingston HyperX modules.

I have only 2 8GB Crucial Ballistix 3200GHz running at XMP1 on my R8. Not sure how much higher the board can support when it comes to RAM speed.

What you're trying here is pushing the perennial Dell RAM problem to the limit. There's already posts about even HyperX RAMs bought without going through Dell getting **bleep** over and not to mention non-matched pair RAMs stopped working after BIOS upgrade. By buying so much RAM without paying Dell-tax, this is going to be an interesting one...

I have only 2 8GB Crucial Ballistix 3200GHz running at XMP1 on my R8. Not sure how much higher the board can support when it comes to RAM speed.

Is it actually running at 3200 MHz or was it down-clocked to 2933?

Gotta take a snapshot of CPU-Z tonight. It's 3200 MHz. Would've gone ape-bleep if it's down-clocked.

double post, ignore

When you were running the 3 x 16GB sticks, did you confirm the frequency or operating speed of the RAM with CPUz and what was it running at?   

The R7 officially supports up to 2933, but there have been some users who have gotten up to 3200 running a post-2019 version of BIOs.  The R8 officially supports up to 3200, but this would be the first I've heard of anyone getting faster than 3200 on an R8.  

I think one factor is the 1.35V vs the 1.2V that Dell's version of HyperX fury is running on. If you bought the Kingston HyperX from retail, then it's 1.35V and some users have reported issues with that. Maybe for all 4 slots to work, you'll need to have them running at 1.2V or during boot at 1.2V, with 4 DIMM modules, the timings get messed up.

Overclocking forums have suggested adjusting latencies and timings but we can't do that with the R8 BIOS. At the end of the day, if you want to go top-of-the-range with components, be prepared to pay Dell-tax or have issues like this. Go see the epic thread(s) on R7 trying to go 9th Gen CPU. I'm sure it's gonna get more epic when 9900KS is released.

@amstel78 , photo below. Will need for approval.

Nice, that photo posted quickly.  Perhaps something also that helped you was that your RAM was manufactured by Micron - they also manufacture the non-Hyper X RAM for the Aurora r7/8.  

I also lost my "edit" function, but it fixed when I refreshed the page. Just keep using that F5 key.  @Anonymous 

Not to nitpick, but it's the Dell Kingston RAM that requires higher voltages to maintain stability (not as good).   Dell Hyper X = 1.35V, Kingston Hyper X = 1.2v. 

Dell HyperX p/n RMWRN  =16GB HyperX Fury (DDR4,XMP,2933MHz,2Gx64,Unbuffered,Non-ECC,Dual Rank,1.35v,288 pin, Kingston XRMWRN-HYA/XRMWRN-MIE)

Dell HyperX p/n J69DF 8GB HyperX Fury (DDR4,XMP,2933MHz,1Gx64,Unbuffered,Non-ECC,Single Rank,1.35v,288 pin, Kingston XJ69DF-HYA/XJ69DF-MIE)

Kingston Hyper X: 2933 = 1.2v.  https://www.newegg.com/p/0RN-00F1-00080?Description=kingston%20hyperx%20fury%20ddr4&cm_re=kingston_hyperx_fury_ddr4-_-9SIAHT69ZB4340-_-Product

Kingston Hyper X 2666: = 1.2v  https://www.kingston.com/dataSheets/HX426C16FB3_16.pdf

Funny you should mention that because mine is Hynix. 

Pic below. Hopefully I have a quick-pic-post power now.

think one factor is the 1.35V vs the 1.2V that Dell's version of HyperX fury is running on. If you bought the Kingston HyperX from retail, then it's 1.35V and some users have reported issues with that. Maybe for all 4 slots to work, you'll need to have them running at 1.2V or during boot at 1.2V, with 4 DIMM modules, the timings get messed up.

@GTS81 The HyperX I purchased from Amazon is 1.2V, not 1.35V. When searching for memory to replace the 2666 OEM DIMMs, I made it a specific point to look for RAM that only required 1.2V to ensure compatibility.

See screen shot below. It's running at 1.2V irrespective of which timing profile is selected.

What's odd is that CPU-Z is reporting your max bandwidth to be smaller than mine. Mine is listed at DD4-2936 (1468 MHz). Yours is at DDR4-2400 at 1200 MHz. That leads me to believe your RAM is only running at 2400 MHz. Looking at your timing tables, the XMP profile which allows for 3200 MHz requires 1.35V; something the Aurora motherboards have a problem supporting. 

What is CPU-Z reporting your DRAM frequency as? Mine shows ~1462 in the current screen shot below. Multiplied by 2 and that's 2924 MHz; close enough to 2933. If yours is truly running at 3200 MHz, then your frequency report should be right around 1600 MHz.

You can verify by checking Task Manager:

@r72019 sounds like your RAM is working just fine. 

From everything I've read thus far, the R8's still have issues with anything over 2933 especially if the voltage requirement to run at the speed exceeds 1.2V.  Forgot about it with the R7s unless Dell releases a BIOS update.

And honestly, the performance difference between 2666, 2933, and 3200 are so minuscule in real world applications that it's not worth the bother (unless you're chasing numbers for bragging rights).

Yeah, I was going off the DRAM manufacturer listed in your CPUZ screenshot.  But now that you mention it, CPUZ also says your max bandwidth is 1200 mhz, which indicates you're only running at 2400 mhz.   If you slide over to the Memory tab in CPUz, what DRAM frequency does it show for you under your timings table? 

The SPD tab is only a list of available timing profiles, it doesn't say which one you're using. 

@amstel78 That's good to know, I have the same RAM as you and my frequency has always hovered around 1463.5 too. 

Task Manager reports 3200 MHz

I'll reach out to the memory team at work to get their input.