Dell PowerEdge R740 vs R750 — Generation 14 to 15 Comparison

This is the comparison enterprise IT teams open first when the 2025–2027 refresh cycle lands on their desk. R740 powered most Egyptian bank data centres through 2019–2022. R750 shipped into the UAE and Saudi carrier-grade racks starting late 2021. The question is never which is better — the R750 is newer by three years — it is is the upgrade worth USD 4,000–12,000 per chassis right now.

At a glance

CPU platform — the real gap

R740 runs Xeon Scalable Gen 1 (Skylake-SP) or Gen 2 (Cascade Lake). Core count tops out at 28 per socket. Memory bandwidth maxes at DDR4-2933 with two DIMMs per channel downclocking to 2666. Six memory channels per socket. UPI interconnect at 10.4 GT/s.

R750 runs Xeon Scalable Gen 3 (Ice Lake-SP). Core count reaches 40 per socket. Eight memory channels per socket instead of six. DDR4-3200 native with full-speed 2DPC on most SKUs. PCIe 4.0 doubles the raw lane bandwidth, so NVMe drives that choke a PCIe 3.0 x4 slot run unthrottled on the R750 backplane.

For CPU-bound workloads — virtualisation hosts packed at 80 %+ utilisation, database servers, HPC nodes — the gap is 35–55 % higher throughput at equivalent socket count. For workloads that sit at 25 % CPU and wait on storage or network, the gap collapses to single digits.

Memory subsystem

R740 takes 24 DIMMs across 12 channels (six per socket, two slots per channel). Mix RDIMM or LRDIMM, DDR4 up to 2933 MHz. ICD stocks thousands of verified R740-compatible DIMMs — representative Dell PNs: 1VRGY, CG17D, D715X, DFK3Y and the faster 370-ADVZ, 370-ADWK, 370-AEOI, 370-AEPP.

R750 takes 32 DIMMs across 16 channels. DDR4-3200 native. If you populate 2 DIMMs per channel with certain dual-rank SKUs the controller drops to 2933, matching R740 territory — but with 33 % more total slots the absolute capacity still wins. Representative R750 DIMMs: 6VDNY, 74FPM, 75X1V, HF6GX.

Cross-compatibility note: DDR4-2933 RDIMMs validated in the R740 will train at 2933 in an R750 (the controller downclocks the slot cleanly). DDR4-3200 RDIMMs from the R750 will run at 2933 in an R740. Memory is the single largest line item ICD customers re-use across the generation jump.

Storage backplane

R740 NVMe support is gated through the PERC H740P and a direct-attach NVMe backplane — maximum 4 NVMe drives with the rest of the bays on SAS/SATA. 16 SFF / 8 LFF. The R740xd variant extends this to 24 SFF with a mid-plane.

R750 ships native NVMe across all 16 bays when specced with the direct-attach NVMe backplane. The PERC H755N runs PCIe 4.0 natively — sustained sequential reads over 13 GB/s on a 16-drive tier are realistic. ICD stocks PERC controllers for both platforms: 14G-era PERC family PNs 04M4C, 0878M, 0DXN6, 0N54P.

2.5-inch drive trays are not interchangeable between R740 and R750 — the latch mechanism changed with the 15G chassis. Customers moving drives must order matching caddies.

Power and cooling

R740 PSU options span 495W–1600W. R750 starts at 800W and scales to 2400W Titanium for dense NVMe + high-TDP CPU configurations. Titanium efficiency (96 %+ at 50 % load) is a genuine operational cost advantage in Egyptian and Gulf data centres where power is 0.10–0.18 USD/kWh and chassis run 24×7.

Sample R740-compatible PSU PNs: 061XT, 0FH2D, 0G34N, 0XW8W and 1JDDV, 1Y45R, 38GYJ, 3MJJP. R750 high-end PSUs: 5222N, D3684, D7RNC, H66J1 and 0GDXX, 450-AGFW, 450-AKKZ, 7GN3C.

RAID controller options

R740 was typically sold with PERC H730P (8GB NV cache) or H740P (8GB NV cache, 12Gb SAS). Both support RAID 0/1/5/6/10/50/60 and feature backup battery with NAND flush on power loss.

R750 brings the PERC 11 family: H345, H355, H755 (8GB cache), H755N (NVMe-specific), HBA355i (pass-through). The H755N is notable — it exposes NVMe drives directly to the OS with hardware RAID on top, the first time Dell delivered that combination natively.

Parts that cross over

• DDR4-2933 RDIMMs — 370-ADVZ, 370-ADWK, 370-AEOI fit either platform, downclock to match slot speed on R740.
• SFF SSDs (most 12Gb SAS drives) — 0184M, 01Y7M, 03VVP — same electrical interface, different tray latch.
• 10K SAS HDDs 2.5″ — 01M0D, 029V4, 03YT5 — same note on caddies.
• iDRAC9 Enterprise licenses — transferable between 14G and 15G chassis via Dell Licensing portal.
• Network mezzanines (OCP NIC 3.0) — a small subset cross-compat, verify by PN.

Parts that do NOT cross over

• CPUs — Xeon Scalable Gen 1/2 will NOT boot on the R750 mainboard (socket LGA 3647 on R740, LGA 4189 on R750). Separate generations: Gen 1/2 PNs SR377, SR37A, SR37H vs Gen 3 PNs HU319, KU009, PGGX1.
• PSUs — connector layout changed, the 1800W R750 PSU will not seat in the R740 chassis.
• Motherboard, heatsinks, fan assemblies, bezel, sliding rails — all chassis-specific.
• PERC H740P (R740) does not fit the R750 riser geometry; H755 (R750) is physically different.

When to keep the R740

If your workload does not saturate PCIe 3.0 storage, does not exceed 28 cores per socket, and your DIMM population sits under 1TB — the R740 will serve through 2028 on Dell OEM ProSupport and through 2030+ on ICD Care+ TPM. Refurb R740 chassis from USD 900–1,800 plus refurb DIMMs from 20–35 USD per 16GB stick. Total rebuild cost under USD 2,500 per node. That’s 60–70 % cheaper than an R750 refurb, 85 % cheaper than new.

French/Moroccan buyers say it plainly: “Le R740, c’est la machine qui refuse de mourir.” — the machine that refuses to die.

When to migrate to R750

Five clear triggers:

1. PCIe 4.0 NVMe required — you are buying 2024-era SSDs specced for 7 GB/s sustained reads and the R740 backplane caps you at 3.2.
2. Core count ceiling hit — 28-core Gen 2 is the max in R740; you need 32+ for a VM density target.
3. Memory over 3TB — R740 physical ceiling, R750 carries 4TB.
4. Dell ProSupport renewal pricing hits a pain point in EGP or NGN — the USD-denominated support contract is costing more each FX cycle.
5. Compliance or regulator demand for current-gen silicon — some financial-services audits flag Gen 1/2 Xeon as ageing.

ICD perspective

ICD stocks 19,000+ Dell-compatible SKUs across Egypt (Cairo hub) and Dubai (GCC distribution). For R740 we maintain depth in 14G memory (2666/2933 MHz RDIMM), PERC H730P/H740P, 750W and 1100W PSUs, and 2.5″ SAS drives 600GB–1.92TB. For R750 we stock 15G memory (3200 MHz RDIMM), PERC H755/H755N, 1400W–1800W PSUs, and both SAS and NVMe SFF drives.

Need a quote for either platform? Request a quote or WhatsApp +20 104 022 2214. Typical response under 4 hours for in-stock items, next-day for sourced parts.