1 Rookie
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42 Posts
25
80385
April 16th, 2021 21:00
Aurora R12, Unacceptable BIOS/Z490 configuration, 11th Gen Intel CPU's (RocketLake)
Dear Dell Team, dear community,
some technical findings with your latest Aurora R12 Rocket Lake rigs with a focus on memory.
Issues:
1) Memory Controller is fixed to Gear 2 Mode despite memory clock. It should stick to Gear 1 until 3600MT/s memory frequency. Otherwise an option in BIOS has to be provided to change modes manually.
2) Read Value has a consistent and massive penalty applied when any XMP profile is enabled.
3) Memory latency is too high for the trained values. Please compare with Gigabyte, ASRock, MSI, ASUS motherboards with same kit and CPU.
4) CPU cache is all over the place with massive fluctuations that will impact gaming likewise (esp. L3).
It is reasonable to continue using Z490 for Rocket Lake. The choice not to allow for manual memory overclocking is fine IF the above is fixed given you are marketing the product to a certain clientele.
Yet the necessary work to at least deliver an acceptable performance in line with other board manufacturers has to be done.
Unfortunately, in the current state, this system configuration is unacceptable. Please check with the ODM of the board and make necessary adjustments.
Should you have any further questions please do not hesitate to contact me.
Sk112
45 Posts
0
June 23rd, 2021 02:00
what is the ram read/write speed?
can someone check with userbenchmark
Vanadiel
8 Professor
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7.1K Posts
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29.7K Points
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June 23rd, 2021 03:00
The X570 and B550A is a known "issue" with CPU-Z
HWInfo has the same "issue".
Aida64 lists it almost correctly as a Low-Power Promontory B550
speedstep
11 Legend
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47K Posts
0
June 23rd, 2021 16:00
I think some of the issues are with INTEL vs AMD.
To test this theory I ordered an ASRock B450M PRO4 AM4 AMD Promontory B450 SATA 6Gb/s USB 3.1 HDMI Micro ATX which seems the closest to what Dell does.
Also ordered Ryzen 7 Pro 4750G Renoir CPU
https://www.asrock.com/support/cpu.asp?s=AM4&u=643
https://www.amd.com/en/support/chipsets/amd-socket-am4/b450
https://www.asrock.com/mb/AMD/B450M%20Pro4/index.asp
Supports AMD AM4 Socket Ryzen™ 2000, 3000 and 5000 Series Desktop Processors
AMD Ryzen series APUs (Renoir) support DDR4 3200 / 2933 / 2667 / 2400 / 2133 ECC & non-ECC
https://www.amazon.com/ASRock-MicroATX-Motherboard-B450M-PRO4/dp/B07FVYKFXF
As far as Bios they also warn about AGESA
5.10 2021/5/12 10.52MB Instant FlashHow to Update icon Update AMD AGESA Combo AM4 v2 1.2.0.2
*ASRock do NOT recommend updating this BIOS if you are going to use Pinnacle, Raven or Summit Ridge CPU on your system.
*Before updating this BIOS, please also read the description in previous BIOS version.
Global Download Global China Download China
5.00 2021/3/18 10.44MB Instant FlashHow to Update icon Update AMD AGESA Combo AM4v 2 1.2.0.0
*Caution!!! Please do NOT update this BIOS if 3300X CPU is being used on your system.
*ASRock do NOT recommend updating this BIOS if you are going to use Pinnacle, Raven or Summit Ridge CPU on your system.
*Before updating this BIOS, please also read the description in previous BIOS version.
stormina33
59 Posts
0
June 23rd, 2021 16:00
I was getting an 80-90 score with ram on userbench before the update with a 80-90ms of ram latency now I’m getting a 50-70 score with read write speeds now high
speedstep
11 Legend
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47K Posts
0
June 23rd, 2021 17:00
It should also be noted that lower voltage OEM ram is better than 1.35v 1.4v 1.5v XMP which may not work at all with your Dell.
Rabbitdude
2 Intern
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509 Posts
0
June 23rd, 2021 21:00
1.35v works fine for some, besides my stock ram running at 1.35v( don't know why but that's what is reported in AWCC for the 3400mhz kit on my end ) in XMP2. I have a set of GSkill that runs 3600mhz 1.35v happily in my wife's R12, 1.4+ though probably ain't happening but I've seen plenty of R11/12 owners rocking aftermarket 1.35s just fine
speedstep
11 Legend
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47K Posts
0
June 23rd, 2021 22:00
I should Clarify that the XMP part doesn't work. Using JEDEC standard 2666 its fine.
So I won't be sending the ram back.
If it worked II was going to order 2 more.
Overclock does improve performance but not by a lot and absolutely 4266 is not 2X to 5X faster than 2133.
I see vendors trying the MHZ myth with 4600 ram @ 1.6v
Others may be fooled by that I am not.
2133 CAS 15-15-15-36 1.2v vs 4266 CAS 19-26-26-46 1.6v is not a huge gain. It is a risk as far as damage however.
Higher speeds have the most impact if you’re using integrated graphics.
Heat spreaders and lights are just for bragging rights.
G.SKILL TridentZ 8GB PC4 25600
F4-3200C16D-16GTZR is next for testing
name
clock
(MHz)
clock
(MHz)
Data
rate
(MT/s)
name
fer rate
(MB/s)
CL-tRCD-tRP
latency
(ns)
DDR4-1600K
DDR4-1600L
11-11-11
12-12-12
13.75
15
DDR4-1866M
DDR4-1866N
13-13-13
14-14-14
13.929
15
DDR4-2133P
DDR4-2133R
15-15-15
16-16-16
14.063
15
DDR4-2400R
DDR4-2400T
DDR4-2400U
16-16-16
17-17-17
18-18-18
13.32
14.16
15
DDR4-2666U
DDR4-2666V
DDR4-2666W
18-18-18
19-19-19
20-20-20
13.50
14.25
15
DDR4-2933W
DDR4-2933Y
DDR4-2933AA
20-20-20
21-21-21
22-22-22
13.64
14.32
15
DDR4-3200AA
DDR4-3200AC
22-22-22
24-24-24
13.75
15
2666 13 15 15 35 60
Rabbitdude
2 Intern
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509 Posts
0
June 23rd, 2021 23:00
Timing and latency makes such a bigger impact than the mhz rating. I have the same set from GSkill 32Gb kit as my wife's coming in the mail next week, hoping it works on mine like it did hers
https://www.newegg.com/g-skill-32gb-288-pin-ddr4-sdram/p/N82E16820232906
speedstep
11 Legend
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47K Posts
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June 24th, 2021 04:00
I ended up ordering 4x 8 to fill all slots.
My B450 board is confusing about what goes where when 2 sticks are used.
Depends on which Version of CPU as to what slots the ram goes in.
So I got lazy with 4 slots filled the order no longer matters.
32 gigs is enough even when using IGPU shared ram.
Strawpedro
1 Rookie
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27 Posts
0
June 24th, 2021 12:00
which XMP now has lower latency?
Vanadiel
8 Professor
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7.1K Posts
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29.7K Points
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June 24th, 2021 12:00
The one with the lowest latency number, but you also need to look at the frequency for that profile.
Typically lower frequencies allow for lower latency numbers, but overall reduced performance due to the lower frequency.
Here's a RAM latency calculator: RAM latency calculator
You can get the Mhz and CL values from the XMP profile.
Difference between speed and latency: Speed and Latency article
speedstep
11 Legend
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47K Posts
0
June 24th, 2021 12:00
Latency @ CAS13
Is the fastest I have found. 13-15-15-35 1.35v
KHX2666C13/8GX
Kingston HyperX Predator 8GB DDR4-2666
HX426C13PB3/8
https://www.kingston.com/dataSheets/HX426C13PB3_8.pdf
XMP TIMING PARAMETERS
•JEDEC: DDR4-2400 CL17-17-17 @1.2V
•XMP Profile #1: DDR4-2666 CL13-15-15 @1.35V
•XMP Profile #2: DDR4-2400 CL12-14-14 @1.35V
Mhz 4266
& Higher is marketing not performance
however I don't have confirmation it works on TEAM Blue INTEL
Wardski1974
2 Intern
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189 Posts
3
June 24th, 2021 16:00
@speedstep can you stop talking about your R10 and stay on topic? Unless you have an R12 you should exit this thread. The constant spamming is so annoying.
jonesy1980
12 Posts
1
June 24th, 2021 16:00
100% agree with this. Been watching this thread and tried to provide some useful information as I am an R12 owner. Everything from this guy is not helpful and hardly relevant.
Jeff
speedstep
11 Legend
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47K Posts
0
June 24th, 2021 17:00
@Wardski1974 @jonesy1980
I own an R10 and an R12.
Definitely don't need your permission to post.
Spam is handled by moderators.
W21KG 8GB HyperX Fury XMP DDR4, 3200MHz, Unbuffered, 288 pin, Single Rank, 1.25V, Non-ECC, Kingston XW21KG-HYD2, XW21KG-MIE, XW21KG-MIE2
is OEM supported Ram.
End Users should not expect non validated Ram to work without issue.
You can also get an R12 on ebay. What you cant easily get is a GPU.
https://www.ebay.com/itm/174812055249