T7810 memory issue (2.7) when I switch CPU from E5-2620V3 to E5-2698V4

Question

Hi,

I recently purchased used T7810 2x E5-2620V3 and plans to upgrade them to E5-2698V4.

The original system worked fine, was able to boot and went into setup mode.

But when I removed both CPUs and replace with the E5-2698V4, the system does not boot and gave (2.7) blink.

If I switched back to the original CPU, then the system is able to boot. I also replace battery.

(I have another T7810 which I am able to the boot with the E5-2698V4 mentioned above.)

Please let me know how to identify/fix the problem!

Thanks!

mazzinia_ · Answer

Hello, there are various revisions of the motherboard. initial revision allows only v3 xeons, so I suspect this is your issue

bcc47312 · Answer

Thanks!   It makes sense, But I cannot find the MB revisions information from Web, what's the release order of 0GWHMW,   0KJCC5 and  0VD98F?   I have the following MBs:   The working MB CN-0GWHMW-72200-5CC-01DA-A02 Non-working MB CN-0GWHMW-72200-51S-00E5-AD0 Bought a used MB CN-0KJCC5-FCW00-789-003F-A00 (Will it work?)   Thanks!   Bill

Andy812 · Answer

look for 0KJCC5, that is the model name. there are indications that some people were testing it with V4 cpu's but no definite info.

Sheer · Answer

I definitely confirm 0KJCC5 works with V4 Xeons.

There's a guy selling them on ebay for $40 right now. It is a fairly easy swap - about 20 minutes. One tip - make absolutely sure you have all the front fan cables and power cables and the front panel audio cable pulled through before you screw the thing down.

Sheer · Answer

Side node, if not sure if you have 0KJCC5, in linux, dmesg | grep 0KJCC5 works fine on ubuntu. You can also do dmidecode | grep 0KJCC5 - it appears in 'Base Board Information' under 'Product Name'

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T7810 memory issue (2.7) when I switch CPU from E5-2620V3 to E5-2698V4

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