Thank you for posting on the Intel* Community.
Our community member is right, you should contact ACER to check on this, we just provide the CPU, but the motherboard manufacturer's enabled their BIOS to support it and they provide the list of compatibility.
Also, the Intel® Celeron® Processor B815 is discontinued, Intel Customer Service no longer supports inquiries for it, but perhaps fellow community members have more information and they jump in and help. You may also find the Discontinued Products website helpful to address your request.
Please keep in mind that this thread will no longer be monitored by Intel. Thank you for your understanding.
Intel Customer Support Technician