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Question Poor RAM performance

May 2, 2020
5
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10
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I built a new desktop with following mobo

TRX40 AORUS MASTER (rev. 1.0)

and used this RAM

Corsair Vengeance RGB PRO 128GB (4x32GB) DDR4 3600 (PC4-28800) C18 Desktop Memory - Black, Model: CMW128GX4M4D3600C18

I've Dell G5 laptop on which I upgraded the RAM to this :

Samsung 32GB DDR4 2666MHz RAM Memory Module for Laptop Computers (260 Pin SODIMM, 1.2V) M471A4G43MB1

I plan to use extra RAM as ramdisk and to that end I benchmarked both system using CrystalDiskMark

Here are the results : CORSAIR

------------------------------------------------------------------------------
CrystalDiskMark 7.0.0 x64 (C) 2007-2019 hiyohiyo
Crystal Dew World: https://crystalmark.info/
------------------------------------------------------------------------------
  • MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
  • KB = 1000 bytes, KiB = 1024 bytes
[Read]
Sequential 1MiB (Q= 8, T= 1): 6798.771 MB/s [ 6483.8 IOPS] < 1079.09 us>
Sequential 1MiB (Q= 1, T= 1): 8472.904 MB/s [ 8080.4 IOPS] < 123.62 us>
Random 4KiB (Q= 32, T=16): 2707.524 MB/s [ 661016.6 IOPS] < 750.00 us>
Random 4KiB (Q= 1, T= 1): 1079.349 MB/s [ 263512.9 IOPS] < 3.72 us>

[Write]
Sequential 1MiB (Q= 8, T= 1): 6515.117 MB/s [ 6213.3 IOPS] < 1124.77 us>
Sequential 1MiB (Q= 1, T= 1): 6459.059 MB/s [ 6159.8 IOPS] < 162.06 us>
Random 4KiB (Q= 32, T=16): 2417.107 MB/s [ 590114.0 IOPS] < 840.03 us>
Random 4KiB (Q= 1, T= 1): 856.825 MB/s [ 209185.8 IOPS] < 4.71 us>

Profile: Default
Test: 1 GiB (x5) [Interval: 5 sec] <DefaultAffinity=DISABLED>
Date: 2020/07/04 3:17:29
OS: Windows 10 Pro for Workstation [10.0 Build 19041] (x64)

DELL G5 Samsung


------------------------------------------------------------------------------
CrystalDiskMark 7.0.0 x64 (C) 2007-2019 hiyohiyo
Crystal Dew World: https://crystalmark.info/
------------------------------------------------------------------------------
  • MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
  • KB = 1000 bytes, KiB = 1024 bytes
[Read]
Sequential 1MiB (Q= 8, T= 1): 7221.038 MB/s [ 6886.5 IOPS] < 1015.70 us>
Sequential 1MiB (Q= 1, T= 1): 10524.051 MB/s [ 10036.5 IOPS] < 99.30 us>
Random 4KiB (Q= 32, T=16): 4036.922 MB/s [ 985576.7 IOPS] < 501.09 us>
Random 4KiB (Q= 1, T= 1): 1218.605 MB/s [ 297511.0 IOPS] < 3.27 us>

[Write]
Sequential 1MiB (Q= 8, T= 1): 10500.882 MB/s [ 10014.4 IOPS] < 697.49 us>
Sequential 1MiB (Q= 1, T= 1): 10525.997 MB/s [ 10038.4 IOPS] < 99.20 us>
Random 4KiB (Q= 32, T=16): 3383.815 MB/s [ 826126.7 IOPS] < 599.46 us>
Random 4KiB (Q= 1, T= 1): 1078.824 MB/s [ 263384.8 IOPS] < 3.70 us>

Profile: Default
Test: 1 GiB (x5) [Interval: 5 sec] <DefaultAffinity=DISABLED>
Date: 2020/07/04 3:18:08
OS: Windows 10 Professional [10.0 Build 18363] (x64)

I am unsure why the desktop RAM is performing poor compared to my laptop RAM.

Any ideas on improving the results on desktop?

Thanks !
 
I built a new desktop with following mobo

TRX40 AORUS MASTER (rev. 1.0)

and used this RAM

Corsair Vengeance RGB PRO 128GB (4x32GB) DDR4 3600 (PC4-28800) C18 Desktop Memory - Black, Model: CMW128GX4M4D3600C18

I've Dell G5 laptop on which I upgraded the RAM to this :

Samsung 32GB DDR4 2666MHz RAM Memory Module for Laptop Computers (260 Pin SODIMM, 1.2V) M471A4G43MB1

I plan to use extra RAM as ramdisk and to that end I benchmarked both system using CrystalDiskMark

Here are the results : CORSAIR

------------------------------------------------------------------------------
CrystalDiskMark 7.0.0 x64 (C) 2007-2019 hiyohiyo
Crystal Dew World: https://crystalmark.info/
------------------------------------------------------------------------------
  • MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
  • KB = 1000 bytes, KiB = 1024 bytes
[Read]
Sequential 1MiB (Q= 8, T= 1): 6798.771 MB/s [ 6483.8 IOPS] < 1079.09 us>
Sequential 1MiB (Q= 1, T= 1): 8472.904 MB/s [ 8080.4 IOPS] < 123.62 us>
Random 4KiB (Q= 32, T=16): 2707.524 MB/s [ 661016.6 IOPS] < 750.00 us>
Random 4KiB (Q= 1, T= 1): 1079.349 MB/s [ 263512.9 IOPS] < 3.72 us>

[Write]
Sequential 1MiB (Q= 8, T= 1): 6515.117 MB/s [ 6213.3 IOPS] < 1124.77 us>
Sequential 1MiB (Q= 1, T= 1): 6459.059 MB/s [ 6159.8 IOPS] < 162.06 us>
Random 4KiB (Q= 32, T=16): 2417.107 MB/s [ 590114.0 IOPS] < 840.03 us>
Random 4KiB (Q= 1, T= 1): 856.825 MB/s [ 209185.8 IOPS] < 4.71 us>

Profile: Default
Test: 1 GiB (x5) [Interval: 5 sec] <DefaultAffinity=DISABLED>
Date: 2020/07/04 3:17:29
OS: Windows 10 Pro for Workstation [10.0 Build 19041] (x64)

DELL G5 Samsung


------------------------------------------------------------------------------
CrystalDiskMark 7.0.0 x64 (C) 2007-2019 hiyohiyo
Crystal Dew World: https://crystalmark.info/
------------------------------------------------------------------------------
  • MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
  • KB = 1000 bytes, KiB = 1024 bytes
[Read]
Sequential 1MiB (Q= 8, T= 1): 7221.038 MB/s [ 6886.5 IOPS] < 1015.70 us>
Sequential 1MiB (Q= 1, T= 1): 10524.051 MB/s [ 10036.5 IOPS] < 99.30 us>
Random 4KiB (Q= 32, T=16): 4036.922 MB/s [ 985576.7 IOPS] < 501.09 us>
Random 4KiB (Q= 1, T= 1): 1218.605 MB/s [ 297511.0 IOPS] < 3.27 us>

[Write]
Sequential 1MiB (Q= 8, T= 1): 10500.882 MB/s [ 10014.4 IOPS] < 697.49 us>
Sequential 1MiB (Q= 1, T= 1): 10525.997 MB/s [ 10038.4 IOPS] < 99.20 us>
Random 4KiB (Q= 32, T=16): 3383.815 MB/s [ 826126.7 IOPS] < 599.46 us>
Random 4KiB (Q= 1, T= 1): 1078.824 MB/s [ 263384.8 IOPS] < 3.70 us>

Profile: Default
Test: 1 GiB (x5) [Interval: 5 sec] <DefaultAffinity=DISABLED>
Date: 2020/07/04 3:18:08
OS: Windows 10 Professional [10.0 Build 18363] (x64)

I am unsure why the desktop RAM is performing poor compared to my laptop RAM.

Any ideas on improving the results on desktop?

Thanks !
Don't understand, what's the connection between Theradripper and that laptop ?
 

dorsai

Honorable
Not here since I am running it on Ram Disk not SSD.
I meant if you want to diagnose ram speed issues you have to have a utility like SiSoftware to investigate ram timings, SPD info, XMP profile, ect...CrystalDisk is a good raw performance tool...I've used it for years.

If I had to guess why the differences between the two platforms the fact that they use entirely different memory subsystems would likley be the cause. Intels ringbus is known to have better latency than AMDs infinity fabric design chips...its the primary reason Intel retains a slight edge in gaming performance at this point even on their relatively old 14nm process.
 
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