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Dell Pro Slim QCS1250 SFF Desktop (Replaces OptiPlex SFF), Intel Ultra 9-285K, 16GB DDR5, 1TB NVMe SSD, WiFi 6E, BT, USB-C, HDMI/DP, Windows 11 Pro, Small Form Factor Business PC – Black
Dell

Dell Pro Slim QCS1250 SFF Desktop

Bottom line: The Dell Pro Slim QCS1250 SFF Desktop is a specs-and-price decision rather than a crowd-consensus one in the processors category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

Pros & Cons

Pros

  • ✓ Intel Ultra 9 — Outperforms the i9-14900K with higher speed and better efficiency.
  • ✓ Backed by Dell's warranty and support channels

Cons

  • ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

Manufacturer description

Model:Dell Pro Silm Small Form FactorColor:BlackWi-Fi:Intel AX211 802.11ax WiFi 6EBluetooth:5.3Ethernet:RJ-45, 10/100/1000 MbpsAudio Ports:1x Universal audio jackFront USB Ports:1x USB 3.2 Gen 1, 2x USB 2.0, 1x USB 3.2 Type-C,Rear USB Ports:2x USB 2.0 Type-A Port with SmartPower On, 2x USB 3.2 Gen 1 Type-A,Video Ports:1x DisplayPort 1.4a, 1x HDMI 1.4b, Dual Monitor SupportGraphics:Intel Arc graphicCPU:Intel Ultra 9-285KCPU Clock Speed:(8- Performance 3.70GHz - 5.70GHz + 16- Efficient 3.20GHz- 4.60GHz)CPU Cores:24CPU Cache:36RAM:DDR5RAM Clock Speed:4800MHzRAM Slots:2x DDR5 DIMMMax Supported…

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SpecPicks Verdict

SpecPicks scored Dell Pro Slim QCS1250 SFF Desktop using a rating × review-volume × price-fit model applied to published specs and reviews across the processors category. Dell's processors lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for processors of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Intel Ultra 9 — Outperforms the i9-14900K with higher speed and better efficiency.
  • Front: 2x USB 2.0, USB-C, USB-A 3.2 and Headset jack
  • Rear: 2x USB-A 3.2, 2x USB 2.0, DisplayPort 1.4a, HDMI 2.1
  • Dual Monitor Support – Equipped with 1x DisplayPort 1.4a and 1x HDMI 2.1 to support two displays simultaneously for enhanced productivity or multitasking.
  • Integrated WiFi 6E + Bluetooth 5.3 – Stay connected with ultra-fast Intel AX WiFi 6E and the latest Bluetooth 5.3 for improved wireless range, speed, and device pairing.

Full Specifications

Rear2x USB-A 3.2, 2x USB 2.0, DisplayPort 1.4a, HDMI 2.1
BrandDell
ColorBlack
Front2x USB 2.0, USB-C, USB-A 3.2 and Headset jack
RAM TypeDDR5 RAM
CPU ModelIntel Core Ultra 9
CPU Speed4.6 GHz
Cache Size30 MB
Model NamePro Slim
Resolution3840 x 2160
Style NameIntel Ultra 9
Unit Count1 Count
Aspect Ratio16:9
ConnectivityBluetooth, USB-C, WiFi
Display TypeLED/LCD
Memory Speed4800 MHz
Model NumberSlim
Video OutputDisplayPort, HDMI
CompatibilityPC
Built-In MediaKeyboard, Mouse, Power Adapter
Full listing titleDell Pro Slim QCS1250 SFF Desktop (Replaces OptiPlex SFF), Intel Ultra 9-285K, 16GB DDR5, 1TB NVMe SSD, WiFi 6E, BT, USB-C, HDMI/DP, Windows 11 Pro, Small Form Factor Business PC – Black

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Dell Pro Slim QCS1250 SFF Desktop (Replaces OptiPlex SFF), Intel Ultra 9-285K, 16GB DDR5, 1TB NVMe SSD, WiFi 6E, BT, USB-C, HDMI/DP, Windows 11 Pro, Small Form Factor Business PC – Black is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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Dell Pro Slim QCS1250 SFF Desktop (Replaces OptiPlex SFF), Intel Ultra 9-285K, 16GB DDR5, 1TB NVMe SSD, WiFi 6E, BT, USB-C, HDMI/DP, Windows 11 Pro, Small Form Factor Business PC – Black
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