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  • Community Question: What makes a good motherboard?

Question Is this already optimized?

rh71

No Lifer
Aug 28, 2001
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Checking my BIOS out, I noticed that DRAM Frequency stated DDR4-2133 (was on auto) but I can manually select to what the 16GB of RAM supports up to - DDR4-2800. Will this afford me any extra performance? CPU is i5-7600K.

 

UsandThem

Elite Member
Super Moderator
May 4, 2000
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Yes it's an Asrock Z170.

I'm curious why Auto would set it lower...
Because that is the "official" memory spec for JEDEC at that time. When you change it to what the module can do, that's called a XMP profile for Intel.

It's pretty much just a type of fail safe for the module to boot on just about every board. There's more too it than that as some modules can have a higher default speed, but for simplicity sake that is pretty much it a nutshell. I've had to change it on all my Intel and AMD systems, as when upon first boot all of the modules stay at DDR4 2133 until I loaded the XMP profile (or DHCP in my AMD system).
 

rh71

No Lifer
Aug 28, 2001
52,529
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Not sure what's going on... I think I was already in profile 1... this is current:




But then CPU-ID says it's equivalent of 2133 (1066MHz)... if it's 2800, it should be 1400, correct?
 

UsandThem

Elite Member
Super Moderator
May 4, 2000
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The CPU-Z shot is showing the module's JEDEC default (2133 CAS 15).

The motherboard shot shows you have loaded the XMP profile, and it running at DDR4 2800 CAS 16).
 

VirtualLarry

Lifer
Aug 25, 2001
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The CPU-Z shot is showing the module's JEDEC default (2133 CAS 15).
It shows that the module IS RUNNING at JEDEC speeds, not XMP.

The motherboard shot shows you have loaded the XMP profile, and it running at DDR4 2800 CAS 16)].
Not on ASRock boards, in my experience, at least, not their Z170 boards. Mine required setting XMP "Enabled" AND setting the DRAM clock appropriately, and maybe even the voltage. Weird, I know. Most boards, when you set the XMP profile, the DRAM clock and voltage (and timings and sub-timings) all get set automagically (along with MCE on some boards). Not on ASRock.
 
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UsandThem

Elite Member
Super Moderator
May 4, 2000
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It shows that the module IS RUNNING at JEDEC speeds, not XMP.
I just tried it on PC, and you're right. It shows the higher speed my RAM is running at (but the version the OP is using appears to be an older build). The version I have is 1.89.1, and I've had this version for a while now.

I haven't played around with an Asrock BIOS for a while, but I remember loading the XMP profile on the Z270 motherboard, and it working correctly.
 

Ranulf

Golden Member
Jul 18, 2001
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Im using 1.74 of CPU-Z and its the same as shown in OP's pics. The memory tab shows current specs the ram is running at. The SPD tab shows the JEDEC stats the installed ram is capable of.

Edit: Also, this post reminded me that my FX system got reset to 1333mhz awhile back. The gigabyte mobo never liked running at 1600mhz without having to manually select 1600 speed and then manually select two different timing settings. Auto detect always puts it at 1333mhz.
 
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