What would it cost to build this PC?

The same parts as the PRC PolarBot1 Custom Gaming Desktop PC Intel Core i7-12700K 3.6GHz 12-Core 16GB DDR4 1TB NVMe M.2 SSD 1TB SSD (2) GeForce RTX 4090 24GB GDDR6X..., bought one by one at Best Buy and Newegg today. Prices as of Oct 1, 2026.

We earn a commission if you buy through our links. How that works

Best Buy subtotal $365.48

Storage Closest equivalent
Patriot - P300 M.2 2280 1TB PCIe Gen3 x4, NVMe 1.3 Internal Solid State Drive (SSD) P300P1TBM28
The same 1TB NVMe SSD
$199.99
No tracked link for this part today
Swap / Upgrade: Storage
Power supply Not listed on the prebuilt
Lian Li - RS 1000W Modular PSU (USB Fan Hub, 90° Inlet, 80+ Gold, 10Y Warranty - White
The prebuilt doesn't list its power supply: 1000W 80 PLUS Gold (enough for this graphics card)
$165.49
Buy at Best Buy: Lian Li - RS 1000W Modular PSU (USB Fan Hub, 90° Inlet, 80+ Gold, 10Y Warranty - White (opens in a new tab)Swap / Upgrade: Power supply

Newegg subtotal $548.86

Processor Exact match
Intel Core i7-12700K - Core i7 12th Gen Alder Lake 12-Core (8P+4E) 3.6 GHz LGA 1700 125W Intel UHD Graphics 770 Desktop Processor - BX8071512700K
The same Core i7 12700K
$319.99
No tracked link for this part today
Swap / Upgrade: Processor
Memory Closest equivalent
Kingfast 16GB 288-Pin PC RAM DDR4 3200 (PC4-25600) Desktop Memory Model Kfast-16GBDR43200(1kit)
The same 16GB DDR4 at 3200 MT/s
$104.99
No tracked link for this part today
Swap / Upgrade: Memory
Motherboard Not listed on the prebuilt
ASRock H610M/ac Intel LGA 1700 (14th/13th/12th Gen) mATX Motherboard (DDR4, PCIe 4.0, Ultra M.2, WiFi 5, Gigabit LAN, HDMI/DP/D-Sub, USB 3.2 Gen1)
The prebuilt doesn't name its motherboard: A H610M board for the LGA1700 socket and DDR4
$85.99
No tracked link for this part today
Swap / Upgrade: Motherboard

Not found today

Graphics card: No RTX 4090 card at Best Buy or Newegg today Pick one yourself

Do the parts fit together?

No problems found. We only check what the stores' listings say. "Check fit" means they don't tell us, so look before you buy.

Check fit The case's listing doesn't say which motherboards it takes. Make sure the case takes a Micro ATX motherboard.
Check fit We don't have the cooler's height or the case's CPU cooler clearance. Compare them before you buy.
OK The processor and the motherboard are both LGA1700.
OK The memory and the motherboard are both DDR4.

Windows 11 Home license: $139.00 (Microsoft's price; leave it out if you already have Windows)

Total: $1,053.34 (without the parts not found today)

Shipping and tax are not included.

Save this build

Buy the whole list

Each button opens that part at the store in a new tab: add it to your cart there, then come back for the next. We tick it off as you go. Prices can change at the store; shipping and tax are not included.

0 of 1 parts added: $0.00 of $165.49 in parts

Add these parts to your Best Buy cart

Power supply Lian Li - RS 1000W Modular PSU (USB Fan Hub, 90° Inlet, 80+ Gold, 10Y Warranty - White $165.49Add to cart at Best Buy: Lian Li - RS 1000W Modular PSU (USB Fan Hub, 90° Inlet, 80+ Gold, 10Y Warranty - White (opens in a new tab)

The prebuilt: $4,199.99 at Newegg

We can compare once every part has a price today.

Buy at Newegg

Prebuilt or build it yourself?

What the prebuilt includes: The $4,200 prebuilt comes assembled and tested, with Windows installed, one warranty for the whole PC and one place to call for support. Parts come with a warranty each, and you install Windows yourself.

Where it may cut corners:

It doesn't list its power supply; an unbranded one is a common corner cut.
It doesn't name its motherboard; a budget board can limit upgrades.
It doesn't list its CPU cooler; a basic stock cooler runs hotter and louder.

Time and skill: A first build takes about 3 to 5 hours with care: seating the CPU and memory, mounting the cooler, routing cables and installing Windows and drivers. No special tools beyond a screwdriver.

Our take: We could not price every part today, so compare again tomorrow before deciding.

How are we doing?