Differences

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--- hardware:asus_rs500a-e11-rs12u [2026/04/07 08:45] – [No PCIe Bifurcation Support] thum
+++ hardware:asus_rs500a-e11-rs12u [2026/04/22 11:55] (current) – thum
@@ Line 1: / Line 1: @@
-<note tip>
-The page will be updated and expanded in the near future.
-</note>
 ====== ASUS RS500A-E11-RS12U ======
 ===== General Information =====
-The ASUS RS500A-E11-RS12U is an AMD EPYC 7003 (Milan) 1U single-socket server (barebone) that supports up to 16x DIMM, 12x NVMe, 3x PCIe 4.0 slots, 1x OCP 3.0, 2x M.2 and ASUS ASMB10-iKVM and in use for the # vikings hosting platform.  It contains the ASUS KRPA-U16 mainboard.
+The ASUS RS500A-E11-RS12U is an AMD EPYC 7003 (Milan) 1U single-socket server (barebone) that supports up to 16x DIMM, 12x NVMe, 3x PCIe 4.0 slots, 1x OCP 3.0, 2x M.2 and ASUS ASMB10-iKVM and in use for the # VIKINGS hosting platform.  It contains the ASUS KRPA-U16 mainboard.
 ===== Rear Panel Features =====
@@ Line 36: / Line 32: @@
 ==== No PCIe Bifurcation Support ====
-The mainboard does not support PCIe bifurcation. PCIe cards that internally use multiple controllers requiring bifurcation to achieve full aggregate bandwidth, e.g. Intel E810-XXVDA4 **may** and e.g. Intel E810-CQDA2 **will** operate with reduced total throughput.  It is recommended to avoid such cards on this mainboard (or ensure they are installed in a sufficiently wide PCIe slot in the case of the Intel E810-XXVDA4 example).
+The mainboard does not support PCIe bifurcation.  PCIe cards that internally use multiple controllers requiring bifurcation to achieve full aggregate bandwidth, e.g. Intel E810-XXVDA4 **may** and e.g. Intel E810-CQDA2 **will** operate with reduced total throughput.  It is recommended to avoid such cards on this mainboard (or ensure they are installed in a sufficiently wide PCIe slot in the case of the Intel E810-XXVDA4 example).
 === Example Intel E810-CQDA2 ===
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 === Example Intel E810-XXVDA4 ===
-The ASUS RS500A-E11 provides a PCIe Gen4 x16 Low Profile slot (x16 link), which is the optimal slot for the Intel E810-XXVDA4.  Since PCIe Gen4 offers sufficient bandwidth even on a single x8 link, and the slot
+Contrary to the E810-CQDA2 the Intel E810-XXVDA4 has **one** internal controller, which receives adequate PCIe bandwidth without requiring bifurcation.  Since PCIe Gen4 offers sufficient bandwidth even on a single x8 link, and there are x8 and x16 slots available, there should be no problems regarding the aggregated maximum speed of 4x 25GbE.
-provides a full x16 link, both internal controllers of the E810-XXVDA4 receive adequate PCIe bandwidth without requiring bifurcation.
-All four 25 GbE ports can operate simultaneously at full line rate (4×25 Gbps = 100 Gbps aggregate) without any PCIe bottleneck.  Note: If the E810-XXVDA4 were installed in a PCIe x8 slot on this mainboard (which does not support bifurcation), the two internal controllers would share the x8 lanes (x4 each), resulting in a PCIe bottleneck when all four ports are simultaneously under full load.  Therefore, installation in the PCIe Gen4 x16 slot is strongly recommended.
+==== Low-Profile Slot Port Obstruction Finding ====
+When using 4-port network cards in one of the low-profile slots, the server chassis obscures one of the ports by about 0.5 mm.  Inserting a GBIC (or SFP transceiver) is possible with some force, but subsequent removal is very difficult or impossible.  We have found this issue with all the barebones we have handled so far.  An issue like this with such well-designed hardware from a reputable vendor is unprecedented, but there are obvious workarounds:
+  * Potential Fixes
+    * When purchasing network cards with 4 slots, use the OCP3.0 or full-height port if possible
+    * For stuck GBICs, **gently** wiggle while pulling or use a flathead screwdriver for leverage without forcing, to prevent port damage
+    * //If you're feeling brave, you can use a Dremel tool to manipulate the areas.  But seriously, only do this if you know what you're doing!//
-==== Low-Profile Slot Port Obstruction ====
-When using 4-port network cards in one of the low-profile slots, the server chassis obscures one of the ports by about 0.5 to 1 mm.  Inserting a GBIC (or SFP transceiver) is possible with some force, but subsequent removal is very difficult or impossible.
-  * Potential Fixes
+===== See also =====
-    * When purchasing network cards with 4 slots, use the OCP3.0 or full-height port if possible.
-    * For stuck GBICs, gently wiggle while pulling or use a flathead screwdriver for leverage without forcing, to prevent port damage.
+[[hardware:asus_rs500a-e11-rs12u_tuning|ASUS RS500A-E11-RS12U Tuning]]
+{{tag>hardware current}}