noob pc builder xmp enabled for 4800 mhz yet only 2400 mhz is being used
noob pc builder xmp enabled for 4800 mhz yet only 2400 mhz is being used
Hello everyone,
I’m a beginner building my first PC and I chose the highest quality parts possible. I’m getting into software development, enjoy gaming, and plan to work on video/music editing and other tasks that demand strong computing performance.
Even though I turned on XMP, I’m still only seeing the standard 2400 Mhz from the box. I’ve tried turning it on and off in the BIOS several times, and I’ve updated the BIOS to the latest version from GIGABYTE. Still, I’m not reaching the 4800 Mhz I paid for.
Below is a summary of the main parts I used:
CPU: AMD Ryzen 9 5950X
Motherboard: Gigabyte X570S AERO G ATX AM4
Memory: XTREEM DDR4 DESKTOP MEMORY (4 x 8 GB)
Feel free to let me know what might be causing the problem! Thank you.
Please confirm your BIOS version for accuracy. Also, verify if the CPU-Z speeds indicate a 2400MHz DRAM frequency, which would equate to 4800MHz when doubled.
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)
There are a few points to clarify at the start. DDR4 operates at double data rate, meaning a transaction rate of 4800 is standard, but the actual clock speed is actually 2400Mhz. Many tools display the clock speed instead of the real transaction rate, so it's important to understand this first.
Secondly, reaching 4800 is a significant memory overclock. It will likely need some adjustments beyond just enabling XMP or DOCP. You'll probably have to adjust the synchronization settings and raise the manual DRAM voltage initially. This is especially true if your CPU's IMC can handle such high rates. All of this depends on whether your CPU can reliably maintain 4800Mtps data rates.
Many Ryzens seem to operate at 4800 MHz, but really it's just 2400 MHz, not because of the controller division ratios slowing things down, which happens above 3600 MHz—actually even lower like 1800 MHz.