ASRock > FAQ

Question: The system doesn't boot properly after loading DRAM XMP Profile on AM4 motherboards. How do I do?(3/1/2017)

Answer:
Please update the latest BIOS from ASRock official website firstly.
Download link: https://www.asrock.com/support/index.asp?cat=BIOS
Because of AM4 memory compatibility issue, some high frequency memory modules may not work with XMP profile successfully. ASRock keeps updating the latest AMD AGESA code to enhance the high frequency memory capability. Please keep tracking the latest BIOS update on ASRock official website.
We have tested some memory modules on AM4 platform and users can refer to our suggested module list for choosing the finest ones to pair with your AM4 motherboard.
Memory support list link:
X370 Professional Gaming,
X370 Taichi,
X370 Killer SLI/ac,
X370 Killer SLI,
X370 Gaming K4,
AB350 Pro4,
AB350M Pro4,
AB350 Gaming K4

Question: My DDR4-2133 DRAM module only runs at DDR4-1866 frequency on Intel 100 series motherboards. How can I fix this?(9/1/2015)

Answer:
Please visit ASRock website and download the latest BIOS for your model.

Question: Why my P55 chipset motherboard cannot boot up, the Dr. Debug LED display shows error code "E8".(10/22/2009)

Answer:
Due to the Chipset spec., please insert the memory module into the white slot (DDR3_B1) which is nearly CPU socket for the first priority.

Please insert your DRAM in this slot for the first priority.

Question: My motherboard is 4Core1600Twins-P35/4Core1600P35-WiFi(+). I want to overclock my FSB 800 CPU. Are there any tips to increase the overclocking capability of my system?(1/14/2008)

Answer:
First of all, please update the BIOS to P1.10 or later.
(Download: https://www.asrock.com/support/download.asp?Model=P35 )

Secondly, please adjust the FSB jumper setting on the motherboard according to the following instructions (this will set the DRAM: FSB (frequency) to 1:1)

After doing the above steps, you may set the "Overclock Mode" to [Manual] in the BIOS>Advanced> CPU Configuration and then adjust the "CPU Frequency" to overclock your system.

Question: My motherboard is ConRoe1333-DVI/H R2.0. Are there recommended memory configurations for my motherboard?(4/25/2007)

Answer:
Please refer to page 17 of user's manual.
https://download.asrock.com/Manual/ConRoe1333-DVIH%20R2.0.pdf
Recommended Memory Configurations (DS: Double Side, SS: Single Side)

	DDRII_1 (Yellow Slot)	DDRII_2 (Orange Slot)	DDRII_3 (Yellow Slot)	DDRII_1 (Orange Slot)
1 memory module	DS/SS*	x	x	x
2 memory modules	DS/SS	x	DS/SS	x
2 memory modules	x	DS/SS	x	DS/SS
3 memory modules	SS	SS	DS/SS	x
4 memory modules	SS	SS	SS	SS

* If you only install one memory module, you can install it to any one of the four slots.
These two TRANSCEND memory modules can only be supported under the following conditions:

DRAM VENDOR	SIZE (MB)	TYPE	CELL VENDOR	CELL NO.	SINGLE SIDE / DOUBLE SIDE
TRANSCEND	256	DDRII533	SAMSUNG	K4T56083QF-ZCD5	SINGLE SIDE
TRANSCEND	512	DDRII533	INFINEON	HYB18T512800AF37	SINGLE SIDE

1. If you plan to install one above memory module, you can install it to any DDRII slot of this motherboard.
2. If you plan to install two above memory modules, it is recommended to install them either in the set of yellow slots (DDRII_1 and DDRII_3), or in the set of orange slots (DDRII_2 and DDRII_4).
3. This motherboard does not support three or four above memory modules.

Question: I'm using the Core 2 Duo E6XXX CPU and DDRII 533/667 RAM on 775Dual-VSTA motherboard. But the system is very unstable. Sometimes it gets blue screen or fail when installing the Windows^® XP or some applications. How do I fix this problem?(9/19/2006)

Answer:
Please refer to following steps to fix this problem.

Please set the "DRAM Frequency" as "[333MHz (DDRII 667)]" in BIOS setup if you use DDRII 667 RAM. (BIOS/ Advanced/ Chipset Configuration/ DRAM Frequency)
Please enable the "Flexibility Option" in BIOS setup if you use DDRII 533 RAM. (BIOS/ Advanced/ Chipset Configuration/ Flexibility Option)
If the problem still remains, please update the BIOS to P1.80 or later version.
https://www.asrock.com/mb/download.asp?Model=775Dual-VSTA#bios

Question: When I use DDR 400 (200 MHz) memory on my board, it shows that the DRAM frequency is running at DDR 333 (166MHz) in BIOS main page. The BIOS option "DRAM Frequency" is set at default setting "Auto". Why?(4/21/2006)

Answer:
In order to get the best system compatibility and stability, we make it to run at DDR 333 (166MHz) when DDR 400 (200MHz) memory is installed and BIOS option "DRAM Frequency" is selected to "Auto". If you want to run DDR 400 (200MHz), please kindly adjust the BIOS option "DRAM Frequency" to DDR 400 (200 MHz) manually.

Question: I am using AMD FSB 200Mhz CPU on K7VT4A PRO, I cannot set my DDR333/ DDR400 memory to DDR333/ DDR400 under BIOS setting. Why?(6/23/2005)

Answer:
For K7VT4A PRO, if you are running with FSB 200 MHz CPU, DDR SDRAM supports 266Mhz only. So you are not able to change the memory speed under BIOS setting.

Question: I use K8 939 pin CPU. When I install two different sizes memory, 256 MB and 512 MB on blue DIMM slots of K8Combo-Z / 939A8X-M / K8Upgrade-1689, it only recognized 512 MB for total memory size. Why?(3/21/2005)

Answer:
Due to the memory sizing code of K8 939 pin revision E CPU, it will auto run at dual channel mode. The two memory modules will be recognized as the same size for both DRAM (256MB + 256MB) to run dual channel mode. For optimal compatibility and reliability, it's recommended to install identical (the same brand, speed, size and chip type) DDR DIMM pair in the slots of same color.

Question: My CPU is Duron FSB 200 MHz CPU. Why my DDR 400 SDRAM can only run at DDR 266 speed on the K7VT6 motherboard?(12/15/2004)

Answer:
According to the specification of VIA KT600, only DDR 266 SDRAM is supported if FSB 200 MHz CPU is installed. DDR 400 SDRAM is supported with FSB 266, 333, or 400 MHz CPU. Please refer to the following supporting table.

FSB \ Memory	DDR 266	DDR 333	DDR 400
200 MHz	Yes	No	No
266 MHz	Yes	Yes	Yes
333 MHz	Yes	Yes	Yes
400 MHz	Yes	Yes	Yes

Question: I'm using Intel FSB 400 MHz CPU, why does my DDR 333 SDRAM only run DDR 266 on P4i45GV?(10/15/2003)

Answer:
According to the Intel's specification, if you're running FSB 400 MHz CPU on P4i45GV, DDR SDRAM only supports 200/266. If you're running FSB 533 MHz CPU, DDR SDRAM supports 266/333.

Question: I'm using Intel FSB 400 MHz CPU, why does my DDR 333 only run DDR 266 on P4i45PE?(8/15/2003)

Answer:
For P4i45PE, if you're running FSB 400 MHz CPU, DDR SDRAM only supports
200/266 MHz. If you're running FSB 533 MHz CPU, DDR SDRAM supports 266/333 MHz.
If you're running FSB 800 MHz CPU, DDR SDRAM supports 400 MHz.

Question: Can I install 4 DIMM of DDR SDRAM with P4 FSB 533 MHz CPU on P4VX4 motherboard?(7/9/2003)

Answer:
If you are using P4 FSB 533 MHz CPU on P4VX4, please install 3 or less than 3 DIMM of DDR SDRAM. When you install 4 DIMM of DDR SDRAM, they would run at DDR 200(PC1600) speed. According VIA chipset SEPC, FSB 533 MHz CPU must run with DDR 266 or higher speed memory. So if you install 4 DIMM of DDR SDRAM, please run with FSB 400 MHz CPU.

Question: I'm using P4i45PE now. How do I run FSB 800 MHz correctly?(7/9/2003)

Answer:
1.Please use Intel^® FSB 800 MHz CPU for your system.
2. Please set FSB jumper in pin 2-3 (Test)
3. Please install one DDR400(PC3200) in slot 1.
DDR SDRAM requires CL=2.5 or CL=2.
Please also refer to P4i45PE memory support list.
https://www.asrock.com/mb/memory/P4i45PE.pdf

Question: Can I use DDR 333 SDRAM on K7VT2?(5/9/2003)

Answer:
Yes, you can install DDR 333 or 400 SDRAM on K7VT2. However, DDR 333 or 400 SDRAM will be running at the speed of DDR 266.

Question: How can I run a FSB800 CPU on P4i45G correctly?(5/9/2003)

Answer:
The requirement for P4i45GL to run with a FSB800 CPU is as following:
1. Adjust the FSB jumper from 1-2 pin (normal) to 2-3 pin (test). The jumper is near the CPU fan connector.
2. Memory requires DDR333 SDRAM
Please make sure that the jumper setting is correct and the memory is DDR333.

Question: Is there any suggestion of CPU and memory for K7S8X motherboard?(5/9/2003)

Answer:
With AMD FSB 200 MHz CPU like Duron, please install DDR 200, 266, or 333 SDRAM.
With AMD FSB 266 MHz CPU like Athlon XP 2000+, please install DDR 200, 266, 333, or 400 SDRAM.
With AMD FSB 333 MHz CPU like Athlon XP 2800+, please install DDR 266, 333, or 400 SDRAM.

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