Can you upgrade the GPU of Dell Dell Pro Slim Plus QBS1250 to play games?

Yes, but with limitations. The Dell Dell Pro Slim Plus QBS1250 allows for gaming upgrades, but due to its compact size, it only supports Low Profile (LP) graphics cards. You will likely be limited to GPUs that draw power directly from the PCIe slot (usually 75W).

Does the Dell Dell Pro Slim Plus QBS1250 support Windows 11?

Yes, the Dell Dell Pro Slim Plus QBS1250 officially supports Windows 11. It features an 8th Gen (or newer) Intel processor and TPM 2.0, meeting Microsoft's official system requirements.

What is the maximum RAM for Dell Dell Pro Slim Plus QBS1250?

The Dell Dell Pro Slim Plus QBS1250 supports up to 128 GB of DIMM DDR5-5600 memory. It typically features four DIMM slots for expansion.

Does the Dell Dell Pro Slim Plus QBS1250 have an M.2 SSD slot?

Yes, the Dell Dell Pro Slim Plus QBS1250 comes with 3 M.2 slot(s) for high-speed SSDs. It also includes SATA ports for additional hard drives or 2.5-inch SSDs.

What processors does the Dell Dell Pro Slim Plus QBS1250 support?

The Dell Dell Pro Slim Plus QBS1250 supports Gen 16 Intel Core processors using the Q870 chipset.

Does the Dell Dell Pro Slim Plus QBS1250 have a USB-C port?

Yes, the Dell Dell Pro Slim Plus QBS1250 features 2 USB-C port(s) for high-speed data transfer and modern peripheral connectivity.

What video ports does the Dell Dell Pro Slim Plus QBS1250 have?

The Dell Dell Pro Slim Plus QBS1250 comes equipped with the following on-board video ports: 3x DisplayPort 1.4a.

How many monitors can Dell Dell Pro Slim Plus QBS1250 support?

The Dell Dell Pro Slim Plus QBS1250 can support up to 3 monitor(s) simultaneously via its on-board motherboard ports. Please note that using these ports requires a processor with integrated graphics (iGPU). If you install a dedicated graphics card, the number of supported monitors will depend on the card's specifications.

When was the Dell Dell Pro Slim Plus QBS1250 released?

The Dell Dell Pro Slim Plus QBS1250 was first released in 2025.

Does the Dell Dell Pro Slim Plus QBS1250 have a slot for a Wi-Fi card?

Yes, the Dell Dell Pro Slim Plus QBS1250 features a dedicated M.2 2230 slot for a Wi-Fi/Bluetooth combo card. While the unit may not always ship with the card installed, the slot allows for easy wireless connectivity upgrades.

Dell Pro Slim Plus QBS1250

Specification and Upgrade Options

The Dell Pro Slim Plus QBS1250 is a pre-built business desktop computer first released in 2025. The motherboard is using the Q870 chipset and supports Intel Core Ultra Series 2 processor, and 128GB of DIMM DDR5-5600 memory.

The Small Form Factor (SFF) is an in-between model. It has less space for the larger form factors (Mid tower, Mini tower, and Desktop), but it is still easily upgradable. Usually the SFF come with 2x PCIe slots, so fitting a low profile graphics card is possible.

Specification

Model
Form factor	Small
CPU options	Intel Core Ultra 5/7/9
Chipset	Q870 (manual)
Dedicated GPU *	AMD Radeon RX 7400
RAM	DIMM DDR5-5600
RAM slots	4
RAM speed	5600 MT/s
RAM max	128 GB
USB ports	(4x) USB-A 2.0; (3x) USB-A 3.2 Gen 1; (1x) USB-A 3.2 Gen 2; (1x) USB-C 3.2 Gen 2; (1x) USB-C 3.2 Gen 2x2;
Video ports	(3x) DisplayPort 1.4a;
Other ports	RJ45 (1 Gbps); Global headset jack; SD-card reader; Serial (optional);
Optional ports	RJ45 (5Gbps)/Fiber/USB-A/USB-C/Thunderbolt 4/HDMI 2.1/VGA/DisplayPort 2.1
SATA ports	2
PCI slots	PCIe 4.0 x16 (half-height); PCIe 3.0 x4 (half-height); PCIe 3.0 x1 (half-height);
M.2 slots	(2x) M.2 2230/2280 (PCIe 4.0 x4, NVMe); (1x) M.2 2230 (PCIe 4.0 x4, NVMe); M.2 2230 (WiFi/BT)
Drive bays	3.5in; 5.25in (slim);
PSU	260/360 W
Weight	6.58 kg (14.51 lb)
Released	2025
Manual	link
Price**	Check Price

* Dedicated GPU warning: Check if your particular power supply model has enough power. Additionally some PSUs don't come with an auxiliary PCIe power connector and you may need to buy a SATA to PCIe power adapter.
** As an Amazon associate we earn from qualifying purchases.

Can you upgrade Dell Pro Slim Plus QBS1250 to play games?

Yes, you can upgrade Dell Pro Slim Plus QBS1250 for gaming with better processors, graphics card, memory, and storage devices. However, like many other business pre-built PCs, this model may have proprietary elements like the power supply, the chassis or the power connector, which can make it difficult for users to install aftermarket PSUs to support better GPUs. You can also find that there is space constrains inside the chassis, making it difficult to accommodete larger GPU to boost the gaming performance.

Does Dell Pro Slim Plus QBS1250 support Windows 11?

Yes, Dell Pro Slim Plus QBS1250 is compatible with Windows 11. According to Windows 11 specification, all models that have Intel 8th Gen processors (or newer) with TPM 2.0 support and a UEFI BIOS with Secure boot, are eligible to upgrade form Windows 10 to Windows 11 through Windows Update.

Processor

The Dell Pro Slim Plus QBS1250 supports Intel Core Ultra Series 2 processors on a Q870 chipset. Intel Core Ultra Series 2 CPUs (Arrow Lake) further advance Intel’s hybrid architecture with improved performance cores and efficiency cores. High-end models are capable of handling modern gaming, advanced emulation, virtualization-heavy homelabs, and demanding professional workloads without significant CPU constraints.

Best CPUs for Dell Pro Slim Plus QBS1250 upgrade:

Model	Cores (Threads)	Base frequency	Turbo
Core Ultra 5 245K	14(14)	4.2 GHz	5.2 GHz
Core Ultra 5 245KF	14(14)	4.2 GHz	5.2 GHz
Core Ultra 7 265K	20(20)	3.9 GHz	5.5 GHz
Core Ultra 7 265KF	20(20)	3.9 GHz	5.5 GHz
Core Ultra 9 285K	24(24)	3.2 GHz	5.7 GHz

GPU upgrade

To upgrade the GPU of OptiPlex 7040 SFF, a low-power, low-profile graphics card must be used. Currently, the most reasonable GPU option is AMD's Radeon RX 6400 low profile. This model has a good price point, delivers decent FPS, and does not require any addtional hardware upgrades.

The low power requirements of this model make it the perfect option for an SFF gaming build. The RX 6400 low does not need any additional power from the PSU and can rely solely on the power delivered by the PCIe slot (75W).

GPU upgrade options for Dell Pro Slim Plus QBS1250 with the stock 360W power supply:

GPU	Power consumption	Memory	Req.
RX 6400 Low profile	50 W	4 GB DDR6	Works with no additional hardware changes
GTX 1050 Ti Low profile	75 W	4 GB DDR5	Works with no additional hardware changes
GTX 1650 Low profile	75 W	4 GB DDR5	Works with no additional hardware changes
RTX A2000 Low profile	70 W	6 GB DDR6 12 GB DDR6	Works with no additional hardware changes

Keep in mind that these low-profile, low-power GPUs can be quite noisy and may run hot when under full load.

Memory

Dell Pro Slim Plus QBS1250 supports up to 128 GB of DIMM DDR5-5600 RAM across four DIMM slots, with memory speeds up to 5600 MT/s and dual-channel support depending on the installed configuration.

Actual supported memory capacity and memory channels may vary depending on the installed CPU and chipset.

Typical Dell Pro Slim Plus QBS1250 memory configurations include 8 GB for everyday productivity and 16 GB for gaming, heavier multitasking, or professional workloads.

Wi-Fi Support

Dell Pro Slim Plus QBS1250 supports Wi-Fi and Bluetooth combo card with the on-board M.2 2230 (Wi-Fi/BT) slot. The card contains a Wi-Fi module that supports various Wi-Fi standards, as well as a Bluetooth module. It is small circuit board that is designed to fit into a dedicated slot on the motherboard.

Keep in mind that the card is not always included and you have to install one yourself.

Wi-Fi and Bluetooth wireless adapter upgrades for Dell Pro Slim Plus QBS1250:

Model	Speed	Frequency	Interface
WiFi 6E (Gig+) Kit	3000 Mbit/s	2.4GHz / 5GHz	NGFF M.2 A/E Key
Rekong AX210	3000 Mbit/s	2.4GHz / 5GHz	NGFF M.2 A/E Key
Gigabyte GC-Wbax200	2400 Mbit/s	2.4GHz / 5GHz	PCIe
TP-Link Archer TX50E	2400 Mbit/s	2.4GHz / 5GHz	PCIe
TP-Link Archer T9UH	1300 Mbit/s	2.4GHz / 5GHz	USB 3.0

Ports

Dell Pro Slim Plus QBS1250 provides a fixed set of external I/O ports for connecting peripherals and displays. Port availability and versions determine supported data transfer speeds and display capabilities.

USB ports

Dell Pro Slim Plus QBS1250 includes ten USB ports in total in the following configuration - (4x) USB-A 2.0; (3x) USB-A 3.2 Gen 1; (1x) USB-A 3.2 Gen 2; (1x) USB-C 3.2 Gen 2; (1x) USB-C 3.2 Gen 2x2;The model include two USB 3.1 ports supporting up to 10 Gb/s transfer speeds.

Video ports

Dell Pro Slim Plus QBS1250 features three DisplayPort 1.4a outputs, suitable for modern digital displays.

No HDMI output is available on the motherboard.

Motherboard video outputs require a CPU with integrated graphics. Systems equipped with a dedicated GPU must use the video ports on the graphics card instead.

SSD storage - M.2 sockets and SATA ports

The Dell Pro Slim Plus QBS1250 comes with two SATA port(s) for connecting storage devices.

Dell Pro Slim Plus QBS1250 has also three M.2 socket(s) that supports PCIe NVMe (PCIe 4.0 x4) or SATA M.2 drives with speed of up to 8 GB/s. Currently this is one of the fastest commercially available versions of the PCIe bus (second to PCIe 5.0), making this configuration perefect for both gaming and work related tasks.

The M.2 PCIe SSD connector in combination with an NVMe drive allows for higher transfer rates, compared to the old SATA interface. In some situations, NVMe device connected to the M.2 PCIe socket can be more than 5 times faster.

*Keep in mind that some M.2 connectors may not support SATA SSDs. Check the motherboard manual to confirm compatibility.

Best PCIe NVMe drives for Dell Pro Slim Plus QBS1250 storage upgrade:

Model	Form factor / Interface	NAND type	DRAM
Samsung 980 PRO SSD	M.2/x4 PCIe 4.0/NVMe	TLC	Yes
CORSAIR MP600 PRO	M.2/x4 PCIe 4.0/NVMe	TLC	Yes
SAMSUNG 970 EVO Plus	M.2/x4 PCIe 3.0/NVMe	TLC	Yes
Western Digital Black SN770	M.2/x4 PCIe 4.0/NVMe	TLC	Yes
Kingston A2000	M.2/x4 PCIe 3.0/NVMe	TLC	Yes

Power Supply

The Dell Pro Slim Plus QBS1250 comes with a 360 Watt PSU. Having a power supply with high power rating is important, especially if you are doing upgrade with addtional components, like dedicated GPU and more HDDs. Will this 360 W be enough, it all depends on your specific use. Please keep in mind that some models might have more than one PSU option. Whenever possible get the most powerful one, as it might make future upgrades easier.