From owner-freebsd-questions@freebsd.org Thu Jan 11 12:14:16 2018 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9326CEA5E24 for ; Thu, 11 Jan 2018 12:14:16 +0000 (UTC) (envelope-from g8kbvdave@googlemail.com) Received: from mail-wr0-x22a.google.com (mail-wr0-x22a.google.com [IPv6:2a00:1450:400c:c0c::22a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 46C9A6CF9A for ; Thu, 11 Jan 2018 12:14:16 +0000 (UTC) (envelope-from g8kbvdave@googlemail.com) Received: by mail-wr0-x22a.google.com with SMTP id s13so1944962wra.10 for ; Thu, 11 Jan 2018 04:14:16 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language; bh=S5THLPnku7k9liwkNjsnHmbfvh391XZu9oNG0lDf1CA=; b=VS+ojrqSkxPzAD05tb9E2et+yuVNwT33E2c7q6h/K8doD7kgw6TzIjmDqEOuNFIHh4 zMfbTKYQcz069qqzUAp0lzJaZFpvcXxbFP4cVTUYlpHTriUclCEFoI5J1mbojaKDUh9B Q2XuJSgkrI45mCEsQ/rAtjr9dwtHQeAjhSHzL1oOb5GydsAH1Y85pRbnvemMz+EAV4H3 J6JbqnClinGSDCqgap/sbjVDzkt69o982cxIjt0JLdmvowBlf7rtH7W+CRohPczku8eW BLhTapqwxdLBADqqTwr3JWSlVowWNARjYKuQu8b02/m5M1sA5nK3vqVll/V4lIrV2va1 6bSA== X-Gm-Message-State: AKGB3mKVhUpjdTaSZBgWagbopQogZm0/O0BTszDpUn7iUJNsabGT8bK/ 2BorgWc8cK8U9+KQqkm0ws4o7t6I X-Google-Smtp-Source: ACJfBot6nGgRl9Zb1Yrxy4yWRmsaq+vJfvbkXT+tnAI5qax0BBsq4qjxU40kY0R22tVaorNQjKIBWg== X-Received: by 10.223.199.146 with SMTP id l18mr19504946wrg.166.1515672854410; Thu, 11 Jan 2018 04:14:14 -0800 (PST) Received: from [192.168.2.55] ([217.41.35.220]) by smtp.gmail.com with ESMTPSA id z71sm13804098wrc.11.2018.01.11.04.14.13 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 11 Jan 2018 04:14:13 -0800 (PST) Subject: Re: freebsd-questions Digest, Vol 709, Issue 5 To: freebsd-questions@freebsd.org References: From: Dave B Message-ID: <0bce5e82-97ba-0a73-e261-c91473837737@googlemail.com> Date: Thu, 11 Jan 2018 12:14:13 +0000 User-Agent: Mozilla/5.0 (X11; Linux i686; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-GB Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit X-Content-Filtered-By: Mailman/MimeDel 2.1.25 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Jan 2018 12:14:16 -0000 That I suspect depends on how many physical address lines are available for it via the memory management system. If the PC documentation says 8G is the max', then that is probably all that'll be seen by the CPU, even if there is 16G installed. There is only one way to find out for sure, at your expense. Personally, I doubt it, and the info at  https://support.hp.com/gb-en/document/c03363664  says it wont. If it does see 16G (or more) best park it in a corner and thrash it with a Live Boot Memtest86 CD for some days, to ensure it's working correctly.   (Let it run to full completion, it can take hours for a full test, even for 4G!) But even that, doesn’t fully exercise the memory management system in the same way an OS will. Chances are, if it works at all with the large memory modules, it'll only "See" and be able to use 8G. Have Fun. Dave B. On 11/01/18 12:00, freebsd-questions-request@freebsd.org wrote: > Subject: > OT: Max system physical memory > From: > Aryeh Friedman > Date: > 10/01/18 14:59 > > To: > FreeBSD Mailing List > > > My computer (HP Pavilion P7-1234, FreeBSD 11.1-RELEASE [amd64]) has 2 240 > pin DIMM (DDR3, PC3-10600) the manual says the max memory is 8 GB but I see > some 16 GB packages (2x8GB). If I put one or two of these in will it see > the extra memory?