Acer Aspire XC-605 BIOS Help. my new RAM is not working because of this issue

Hello Chucko,

I'll give you instructions for updating the BIOS to the latest P11.B4.

I think you should check your existing memory and see if it is DDR3L 1.35 V or DDR3 1.5 V. It will be written on the label on your memory.

If your existing memory is 1.5 V, I would recommend the Kingston memory below. Try to match the same 1.35 or 1.5...whichever you have.

https://www.kingston.com/us/memory/search?DeviceType=2&Mfr=ACE&Line=Aspire&Model=89520

In theory, it shouldn't matter mixing DDR3 and DDR3L on your xc-605 desktop mainboard, but I remember someone else had a problem mixing for some unknown reason when using DDR3L Crucial memory on their XC-605. If you're in doubt, I would recommend the Kingston memory.

Here's instructions for updating your BIOS, but I don't think that's really your problem.

The standard operating procedure (SOP):

1. Download P11.B4

2. Extract

3. Copy the Win and ROM folders to a USB flash drive.

4. Open an admin command prompt

5. If your USB flash drive has a drive letter of F, then you would type

F:

cd win

flash

6. After the processing completes, restart your computer

7. When it prompts you to enter the BIOS, press the "delete" key on your keyboard to enter the BIOS settings

8. Load the BIOS defaults (F9) and then save/exit (F10).

your right they are different voltages my new ram is 1.5 and the ram in my pc is 1.35. take it this board cant take 1.5. damm

@Chucko

Your mainboard should work at either 1.35V or 1.5V. But for whatever reason, it doesn't like mixed ram. If you install two 1.35V DDR3L modules, it will work fine. If you install two DDR3 1.5V modules it will work fine. DDR3L is supposed to run at 1.35 or 1.5, but for whatever reason, your mainboard/UEFI doesn't like mixing DDR3 and DDR3L.

My mainboard is running 1.5V DDR3. (I have TC-605 which uses the same mainboard as XC-605)

hmmmm i dont know then as ive tried the 1.5v ram on its own and does not work either, fans go into turbo mode and just black screen. which is why i thought it could be the old bios.

It could be just a matter of pulling out the CMOS battery for a couple hours and resetting BIOS. But I don't want to waste your time with guesses. If your computer came with 1.35V, it's probably best to just return the 1.5V and get some 1.35.

If I remember correctly, if you install a single stick of ram, you must put in the slot closest to the CPU

wont be able to return now i dont think it was brought as a gift before christmas on amazon i think. could try the battery and bios, when you say reset BIOs do you mean update to P11.b4

If you unplug the computer from the elctrical outlet, and pull out the CMOS battery for a couple hours, it will reset the BIOS. I wasn't talking about updating the BIOS.

could this not cause some boot issues if done incorrectly say?

If you're not comfortable.........It might be best to just try to sell your 1.5V memory on ebay. And then get the 1.35V in link below.

https://www.kingston.com/us/memory/search?DeviceType=2&Mfr=ACE&Line=Aspire&Model=89520

HelpMe35

To Flash it. Simply unplug your machine and take out the battery. Hold power for 30 seconds, plug machine in, hold fn+esc, press power, let go of fn +esc after machine starts.

To create USB. Open cmd as admin.
Diskpart
List disk
Select disk "your disk number no quote "
Clean
Create partition primary
List partition
Select partition "your partition number"
active
Format fs=fat size=4000 quick

Download the Acer bios from drivers and downloads, extract the exe, and place the contents on the USB

NOTE: If you try to do the wrong version; and keep holding FN+ESC, you will enter efi shell where you can load EFI protocols and device drivers, and execute simple scripts.

The system cannot find the path specified.

https://community.acer.com/en/discussion/comment/1168503#Comment_1168503

Is F the drive letter of your USB drive? In the instructions, I used drive letter F as an example.

Also, when you copied the WIN and ROM folders to the USB drive, you have to copy them to the root directory.

Samuel-Acer

Requesting you to share the complete model name of your unit and elaborate the issue. This helps us to assist you much better.

https://www.kingston.com/en/memory/search?DeviceType=2&Mfr=ACE&Line=Aspire&Model=89520

The instructions for the BIOS update were for a circa 2014 Acer desktop XC-605. Please don’t attempt those instructions if you don’t have an XC-605.

The original poster didn’t need to update his BIOS. His problem was that he bought the wrong RAM—-he mixed 1.35V with 1.5V RAM on his Acer/Intel H81 XC-605 mainboard. So the solution to his problem on his XC-605 was to install 2 sticks of compatible DDR3L 1.35V. (See previous post above with link to Kingston website).

compatible ram in link below for XC-605

I already solved this problem, but another problem appeared, I do everything exactly according to the instructions, there is no video for this motherboard Aspire XC-605 knocks out an error - Secure Flash enabled, recalculate ROM size with signature...

- FFS checksums ......... ok

4 - Error: ROM file ROMID is not compatible with existing BIOS ROMID.

https://community.acer.com/en/discussion/comment/1168509#Comment_1168509

Yes, my flash drive was under the letter F and Win and Rom were just on a flash drive, but I solved this problem when I made DOS through a rufus flash drive, but still now another error Secure Flash enabled, recalculate ROM size with signature...



- FFS checksums ......... ok



4 - Error: ROM file ROMID is not compatible with existing BIOS ROMID.

https://community.acer.com/en/discussion/comment/1168558#Comment_1168558

Aspire XC-605 but now another error... Secure Flash enabled, recalculate ROM size with signature...

 - FFS checksums ......... ok

4 - Error: ROM file ROMID is not compatible with existing BIOS ROMID.