https://cmp.wiki/w/index.php?action=history&feed=atom&title=Dell_PowerEdge_R740Dell PowerEdge R740 - Revision history2026-10-31T12:12:13ZRevision history for this page on the wikiMediaWiki 1.43.11https://cmp.wiki/w/index.php?title=Dell_PowerEdge_R740&diff=164&oldid=prevImportBot: Dell PowerEdge R740 notes for CMP 170HX: a GPU power plug fault report from Discord (chonsworth) and 14th-gen BIOS settings from @darkmaniac7 (Ivan) lab notes2026-10-30T08:04:09Z<p>Dell PowerEdge R740 notes for CMP 170HX: a GPU power plug fault report from Discord (chonsworth) and 14th-gen BIOS settings from @darkmaniac7 (Ivan) lab notes</p>
<p><b>New page</b></p><div>{{Platform<br />
|board=Dell PowerEdge R740 (14th generation)<br />
|cpu=Dual Intel Xeon Scalable<br />
|bios_version=<br />
|settings=For the 64 GB BAR1: Integrated Devices, "Memory Mapped I/O above 4GB" Enabled and "Memory Mapped I/O Base" set for the most room (check the names on your BIOS)<br />
|gen2_result=<br />
|rebar_result=<br />
|p2p_result=<br />
|os_driver=<br />
|virtualization=Bare metal<br />
|cards=<br />
|status=Reported<br />
|tested_by=chonsworth<br />
|source=https://discord.com/channels/1518634379604136178/1534370835220004885/1558775876743856149<br />
}}<br />
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No full CMP 170HX result on an R740 has been posted yet. A testing task for Gen2 and BAR1 on an R740 is a good candidate for the board.<br />
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== BIOS settings that matter ==<br />
On 14th-generation PowerEdge (R640, R740 and so on), the settings for the 64 GB BAR1 are under Integrated Devices: "Memory Mapped I/O above 4GB" and "Memory Mapped I/O Base". Dump the current values before changing anything:<br />
<syntaxhighlight lang="bash"><br />
racadm get BIOS.IntegratedDevices<br />
racadm get BIOS.SysProfileSettings<br />
racadm get BIOS | grep -iE "mmio|4g|bar|sriov|slot|speed|link|bifurc|aspm"<br />
</syntaxhighlight><br />
Some Dell GPU configurations put a PCIe switch between the slot and the CPU; the switch's windows must grow too. Full procedure: [[Server BIOS setup]]. {{Source|handle=darkmaniac7|date=2026-10-29|note=lab notes}}<br />
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== Known issues ==<br />
chonsworth suspects his R740 system board is not powering one of the GPU power plugs and asked for schematics or boardviews; no answer was posted. {{Source|handle=chonsworth|date=2026-10-11|link=https://discord.com/channels/1518634379604136178/1534370835220004885/1558775876743856149}}<br />
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== Related ==<br />
[[Platforms]], [[Dell PowerEdge R730]], [[Server BIOS setup]], [[Cooling and power]].<br />
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