[SOLVED] Noob PC builder, XMP turned on to run at 4800 Mhz but actually running at 2400 Mhz

[lmcintosh623]

Hello all,

I am a noob PC builder who just built his first PC. I went for top of the line components as I am starting out in software development, enjoy gaming recreationally, and am interested in trying my hand at video/music editing and other trades that require high computing power.

Despite having turned XMP on, I am still only getting the original 2400 Mhz out of the box functionality and am not sure what the issue is. So far I have entered the BIOS several times, enabling and disabling XMP. I have also updated the BIOS to the most recent state as provided by GIGABYTE. Not sure what left to do to try to get the 4800 Mhz I paid for.

A list of the main components used in question below:

CPU: AMD Ryzen 9 5950X (link to manufacturer site)

Motherboard: Gigabyte X570S AERO G ATX AM4 Motherboard (link to manufacturer site)

Memory: XTREEM DDR4 DESKTOP MEMORY (link to manufacturer site), 4 x 8 GB (I bought two of these 2 x 8GB sticks of RAM, yielding 4 x 8GB identical sticks of RAM.)

- Specifications:

Series	XTREEM
Module Type	288 Pin Unbuffered DIMM Non ECC
Frequency	4800 Mhz
Latency	CL 20-28-28-48
Capacity	8GB X 2
Data Transfer Bandwidth	38,400 MB/s (PC4 38400)
Voltage	1.5 V
Dimensions	48(H) x 134(L) x 9(W)mm

Please help me figure out where I went wrong! Thank you in advance.

 

[Lutfij]

Welcome to the forums, newcomer!

For the sake of relevance, can you state what BIOS version you're on at the time of writing? Are you seeing the speeds mention in CPU-Z? If so, 2400MHz showing up in DRAM frequency, memory tab, times 2 = 4800MHz

 

[lmcintosh623]

Welcome to the forums, newcomer!

For the sake of relevance, can you state what BIOS version you're on at the time of writing? Are you seeing the speeds mention in CPU-Z? If so, 2400MHz showing up in DRAM frequency, memory tab, times 2 = 4800MHz

BIOS version is F4a, here is the link to the BIOS versions offered by GIGABYTE for the X570S Aero G motherboard: link.

As for CPU-Z, it appears the opposite affect is happening (1200 MHz showing up in DRAM frequency, memory tab, times 2 = 2400 MHz). I am unable to attach the screenshot I have taken as this website has identified it as spam and the text file is ridiculously long, so here are the important/relevant parts of it:

Chipset
Northbridge	AMD Ryzen SOC rev. 00
Southbridge	AMD X570 rev. 51
Bus Specification	PCI-Express 4.0 (16.0 GT/s)
Graphic Interface	PCI-Express 4.0
PCI-E Link Width	x16 (max 16x)
PCI-E Link Speed	16.0 GT/s (max 16.0 GT/s)
Memory Type	DDR4
Memory Size	32 GBytes
Channels	2 x 64-bit
Memory Frequency	1199.7 MHz (1:12)
Memory Max Frequency	1600.0 MHz
CAS# latency (CL)	16.0
RAS# to CAS# delay (tRCD)	16
RAS# Precharge (tRP)	16
Cycle Time (tRAS)	39
Bank Cycle Time (tRC)	55
Command Rate (CR)	2T
Uncore Frequency	1199.7 MHz
Memory SPD
DIMM #	1
SMBus address	0x50
Memory type	DDR4
Module format	UDIMM
Module Manufacturer(ID)	TEAMGROUP Inc. (7F7F7F7FEF000000000000000000)
SDRAM Manufacturer (ID)	SK Hynix (AD00000000000000000000000000)
Size	8192 MBytes
Max bandwidth	DDR4-4806 (2403 MHz)
Max JEDEC	DDR4-2400 (1200 MHz)
Part number	TEAMGROUP-UD4-4800
Serial number	01048A69
Manufacturing date	Week 02/Year 22
Nominal Voltage	1.20 Volts
EPP	no
XMP	yes, rev. 2.0
AMP	no
JEDEC timings table	CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1	10.0-11-11-25-35 @ 766 MHz
JEDEC #2	11.0-12-12-27-38 @ 833 MHz
JEDEC #3	12.0-12-12-29-41 @ 900 MHz
JEDEC #4	13.0-13-13-31-44 @ 966 MHz
JEDEC #5	14.0-15-15-35-49 @ 1066 MHz
JEDEC #6	15.0-16-16-37-52 @ 1133 MHz
JEDEC #7	16.0-16-16-39-55 @ 1200 MHz
JEDEC #8	17.0-16-16-39-55 @ 1200 MHz
JEDEC #9	18.0-16-16-39-55 @ 1200 MHz
XMP profile	XMP-4806
Specification	DDR4-4806
VDD Voltage	1.500 Volts
Min Cycle time	0.416 ns (2403 MHz)
Max CL	20.0
Min tRP	11.50 ns
Min tRCD	11.50 ns
Min tRAS	19.75 ns
Min tRC	31.37 ns
Min tRRD	5.75 ns
XMP timings table	CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1	20.0-28-28-48-76-n.a @ 2403 MHz (1.500 Volts)
DIMM #	2
SMBus address	0x51
Memory type	DDR4
Module format	UDIMM
Module Manufacturer(ID)	TEAMGROUP Inc. (7F7F7F7FEF000000000000000000)
SDRAM Manufacturer (ID)	SK Hynix (AD00000000000000000000000000)
Size	8192 MBytes
Max bandwidth	DDR4-4806 (2403 MHz)
Max JEDEC	DDR4-2400 (1200 MHz)
Part number	TEAMGROUP-UD4-4800
Serial number	01048A4D
Manufacturing date	Week 02/Year 22
Nominal Voltage	1.20 Volts
EPP	no
XMP	yes, rev. 2.0
AMP	no
JEDEC timings table	CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1	10.0-11-11-25-35 @ 766 MHz
JEDEC #2	11.0-12-12-27-38 @ 833 MHz
JEDEC #3	12.0-12-12-29-41 @ 900 MHz
JEDEC #4	13.0-13-13-31-44 @ 966 MHz
JEDEC #5	14.0-15-15-35-49 @ 1066 MHz
JEDEC #6	15.0-16-16-37-52 @ 1133 MHz
JEDEC #7	16.0-16-16-39-55 @ 1200 MHz
JEDEC #8	17.0-16-16-39-55 @ 1200 MHz
JEDEC #9	18.0-16-16-39-55 @ 1200 MHz
XMP profile	XMP-4806
Specification	DDR4-4806
VDD Voltage	1.500 Volts
Min Cycle time	0.416 ns (2403 MHz)
Max CL	20.0
Min tRP	11.50 ns
Min tRCD	11.50 ns
Min tRAS	19.75 ns
Min tRC	31.37 ns
Min tRRD	5.75 ns
XMP timings table	CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1	20.0-28-28-48-76-n.a @ 2403 MHz (1.500 Volts)
DIMM #	3
SMBus address	0x52
Memory type	DDR4
Module format	UDIMM
Module Manufacturer(ID)	TEAMGROUP Inc. (7F7F7F7FEF000000000000000000)
SDRAM Manufacturer (ID)	SK Hynix (AD00000000000000000000000000)
Size	8192 MBytes
Max bandwidth	DDR4-4806 (2403 MHz)
Max JEDEC	DDR4-2400 (1200 MHz)
Part number	TEAMGROUP-UD4-4800
Serial number	01048A52
Manufacturing date	Week 02/Year 22
Nominal Voltage	1.20 Volts
EPP	no
XMP	yes, rev. 2.0
AMP	no
JEDEC timings table	CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1	10.0-11-11-25-35 @ 766 MHz
JEDEC #2	11.0-12-12-27-38 @ 833 MHz
JEDEC #3	12.0-12-12-29-41 @ 900 MHz
JEDEC #4	13.0-13-13-31-44 @ 966 MHz
JEDEC #5	14.0-15-15-35-49 @ 1066 MHz
JEDEC #6	15.0-16-16-37-52 @ 1133 MHz
JEDEC #7	16.0-16-16-39-55 @ 1200 MHz
JEDEC #8	17.0-16-16-39-55 @ 1200 MHz
JEDEC #9	18.0-16-16-39-55 @ 1200 MHz
XMP profile	XMP-4806
Specification	DDR4-4806
VDD Voltage	1.500 Volts
Min Cycle time	0.416 ns (2403 MHz)
Max CL	20.0
Min tRP	11.50 ns
Min tRCD	11.50 ns
Min tRAS	19.75 ns
Min tRC	31.37 ns
Min tRRD	5.75 ns
XMP timings table	CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1	20.0-28-28-48-76-n.a @ 2403 MHz (1.500 Volts)
DIMM #	4
SMBus address	0x53
Memory type	DDR4
Module format	UDIMM
Module Manufacturer(ID)	TEAMGROUP Inc. (7F7F7F7FEF000000000000000000)
SDRAM Manufacturer (ID)	SK Hynix (AD00000000000000000000000000)
Size	8192 MBytes
Max bandwidth	DDR4-4806 (2403 MHz)
Max JEDEC	DDR4-2400 (1200 MHz)
Part number	TEAMGROUP-UD4-4800
Serial number	01048A68
Manufacturing date	Week 02/Year 22
Nominal Voltage	1.20 Volts
EPP	no
XMP	yes, rev. 2.0
AMP	no
JEDEC timings table	CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1	10.0-11-11-25-35 @ 766 MHz
JEDEC #2	11.0-12-12-27-38 @ 833 MHz
JEDEC #3	12.0-12-12-29-41 @ 900 MHz
JEDEC #4	13.0-13-13-31-44 @ 966 MHz
JEDEC #5	14.0-15-15-35-49 @ 1066 MHz
JEDEC #6	15.0-16-16-37-52 @ 1133 MHz
JEDEC #7	16.0-16-16-39-55 @ 1200 MHz
JEDEC #8	17.0-16-16-39-55 @ 1200 MHz
JEDEC #9	18.0-16-16-39-55 @ 1200 MHz
XMP profile	XMP-4806
Specification	DDR4-4806
VDD Voltage	1.500 Volts
Min Cycle time	0.416 ns (2403 MHz)
Max CL	20.0
Min tRP	11.50 ns
Min tRCD	11.50 ns
Min tRAS	19.75 ns
Min tRC	31.37 ns
Min tRRD	5.75 ns
XMP timings table	CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1	20.0-28-28-48-76-n.a @ 2403 MHz (1.500 Volts)

 

[emitfudd]

If I remember right, Ryzen uses a setting called DOCP instead of XMP. See if you have that in your BIOS.

Edit: it looks like Gigabyte calls it EOCP.

 

[drea.drechsler]

Hello all,

I am a noob PC builder who just built his first PC. I went for top of the line components as I am starting out in software development, enjoy gaming recreationally, and am interested in trying my hand at video/music editing and other trades that require high computing power.

Despite having turned XMP on, I am still only getting the original 2400 Mhz out of the box functionality and am not sure what the issue is. So far I have entered the BIOS several times, enabling and disabling XMP. I have also updated the BIOS to the most recent state as provided by GIGABYTE. Not sure what left to do to try to get the 4800 Mhz I paid for.

A list of the main components used in question below:

CPU: AMD Ryzen 9 5950X (link to manufacturer site)

Motherboard: Gigabyte X570S AERO G ATX AM4 Motherboard (link to manufacturer site)

Memory: XTREEM DDR4 DESKTOP MEMORY (link to manufacturer site), 4 x 8 GB (I bought two of these 2 x 8GB sticks of RAM, yielding 4 x 8GB identical sticks of RAM.)

- Specifications:

Series	XTREEM
Module Type	288 Pin Unbuffered DIMM Non ECC
Frequency	4800 Mhz
Latency	CL 20-28-28-48
Capacity	8GB X 2
Data Transfer Bandwidth	38,400 MB/s (PC4 38400)
Voltage	1.5 V
Dimensions	48(H) x 134(L) x 9(W)mm

Please help me figure out where I went wrong! Thank you in advance.

There's a couple things that could be going on... first thing may be pedantic but worth repeating: DDR4 is double data rate so 4800 is the transaction rate, the actual clock speed is 2400Mhz. Many utilities report out the clock speed, not the transaction rate, so you have to clear that up first.

Second: 4800 is a very high memory overclock. It will almost definitely require some tweaking, not just setting XMP (or DOCP depending). At the very least you'll probably need to de-sync the IF. Probably also set a manual DRAM voltage much higher than you think necessary, at least at first until you get stable operation and you can find the lowest voltage that it will stay stable. And all this assumes the IMC of your specific CPU is even capable of 4800Mtps data rates: as always you're at the mercy of the silicon Gods with these things.

 

[mdd1963]

Doubt many Ryzens are running at any 4800 MHz (really only 2400!) anyway without the stupid controller divider ratios actually slowing things down, which occurs at anything above 3600 MHz (well 1800 MHz, actually!)