I engaged "Dave's Computer" to build a new custom build Windows 11 computer as replacement for the Windows 10 machine. I presented my thoughts and needs to Dave about the new unit and he asked some basic questions as to my needs and want for the new unit. We touched on cost for the unit and I left...
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AI Workstation Builds · Dave's Computers, Somerville NJ
AI Workstation PC Builds in New Jersey: Local LLMs, Stable Diffusion and Data Work
You want to run language models, generate images or crunch data on a machine you own, without sending anything to someone else's server. I build AI workstation PCs at my Somerville, NJ shop, specced around the models you plan to run. It's part of my custom PC repair and upgrade service in NJ.
⭐ 4.8 Stars · 430+ Google Reviews
🏆 On the Bench Since 2011
📍 Somerville, NJ · Drop-Off Shop
🔧 $150 Consultation, Credited Toward the Build
📞 Call (908) 428-9558
🚗 Directions to the Shop
What Actually Matters in an AI Workstation
Six things decide whether a model runs well or doesn't load at all.
GPU memory is the ceiling. A language model or image model has to fit in the graphics card's memory (VRAM) to run at full speed. If it doesn't fit, the software either refuses to load it or spills into system RAM and crawls. So I spec an AI build from the card's memory class first and everything else second. Tom's Hardware's Stable Diffusion testing shows it plainly: at higher resolutions, cards short on memory fail to produce an image at all while the same GPU family with more memory finishes the job.
System RAM is the workspace. Model files stage through RAM on the way to the card, datasets load into it for cleanup, and some runtimes split a model between card and RAM when it doesn't fit. AI builds get more RAM than gaming builds, running at rated speed.
Fast NVMe storage. Model files are large, you'll end up with a folder of them, and loading one from a slow drive is a coffee break. The operating system and active models go on fast NVMe, with a second large drive for the archive when the job calls for it.
CPU cores for data prep. The GPU does the inference; the CPU does everything around it, from cleaning tables and resizing images to running the scripts that feed the card. A current high-core-count desktop CPU keeps the card busy.
A power supply with headroom. AI workloads pin the graphics card at full draw for hours, a different load than a game that spikes and settles. I use ATX 3.x supplies with a native 12V-2x6 connector and real margin above the card's draw. Skimp here and you get the shutdowns and melted connectors I see on the repair side.
Cooling for sustained load. A case that breathes, enough intake to feed the card, and a CPU cooler sized for the chip's real sustained output. Quiet and cool are compatible with the right case and fans; see my quiet PC build page.
Gaming PC and AI PC: same parts, different priorities. A gaming build chases frame rates, so the money goes to raw GPU speed. An AI build chases capacity, so the money goes to GPU memory, RAM and storage. An AI workstation games very well; a gaming tower often has too little card memory for the models people want to run.
Use Case vs. What Drives the Spec
Tiers, not part numbers. The quote names a tier and a price; the spec sheet comes at pickup.
| What you want to do | GPU memory class | System RAM | Storage |
|---|---|---|---|
| Local LLM assistant for private drafting, coding help, offline use (small to mid-size models) | Mid-range consumer card | Standard AI tier (double a gaming build) | Fast NVMe for OS and models |
| Larger local LLMs that feel close to a cloud service, long documents, retrieval over your own files | Upper consumer card, memory-first | Large tier | Fast NVMe plus a second large drive |
| Image generation (Stable Diffusion and similar) at high resolution, batches, video experiments | Upper consumer card | Standard AI tier | Fast NVMe, large capacity for checkpoints |
| Small business analytics, document processing, scripted data work | Mid-range card, more CPU cores | Large tier | Fast NVMe plus bulk data drive |
| Students and researchers: fine-tuning small models, coursework, experiments | Mid-range to upper consumer, by model size | Standard to large | Fast NVMe plus room for datasets |
Tiers as of this writing. Bring the models you plan to run and I'll match the tier. CAD and engineering overlap with the analytics tier; see my workstation build guide for that side. Already have a workstation that needs fixing? That's workstation repair.
What's Included With the Build
Every tower leaves my Somerville bench the same way.
1
Consultation around your models
What you plan to run, how often, and whether it must stay offline. The $150 consultation is credited in full toward the build when you approve the quote. Start with the build request form or walk in.
2
Quote with a tier and a price
The performance tier and the number. Quality retail parts with a manufacturer warranty, no proprietary boards. No parts list; the written spec sheet comes with the finished machine.
3
Build, BIOS and memory
Assembled by me, BIOS current, memory at its rated speed and verified, cabling routed so the card and power supply breathe.
4
Windows 11 and a real stress test
Windows 11 installed and activated on a platform that meets Microsoft's requirements (TPM 2.0, UEFI Secure Boot). Then a sustained stress test on CPU and GPU together, because that's what an AI job looks like.
Optional: name the AI runtime or app you use and I'll install it, load a model, and confirm it's running on the graphics card before pickup.
5
Pickup with a spec sheet
You leave with the tower and the written spec sheet. Later repairs and upgrades go through my custom PC repair and upgrade service.
What an AI Workstation Build Costs
Creator-class pricing, driven mostly by the graphics card.
AI workstation builds start at $2,500 as of this writing. The $150 consultation is credited in full toward the build when the quote is approved. The quote gives you a performance tier and a price; the written spec sheet comes at pickup.
The graphics card sets the price, and the memory class you need sets the card. A build for a small local assistant and image generation lands near the floor. One for the larger models costs considerably more, and you'll hear that number before you commit. My page on how much it costs to build a PC covers the ranges.
Under $2,500, I'll usually recommend upgrading the tower you already own. A card with more memory, a RAM upgrade and an NVMe drive can turn a recent gaming desktop into a capable AI machine for a fraction of a new build. My which upgrade first page gives the order.
When I'll Tell You Not to Build One
A $2,500+ tower has to earn its keep.
For occasional use, a cloud subscription is cheaper. If you run a handful of prompts a week or a few images a month, the subscription stays under the cost of a build for a long time, and the cloud model will be larger than anything a consumer card holds. I'd rather say that at the consultation than sell you a machine that idles.
The line moves toward a local build in three situations. Privacy: client files, medical or legal documents, unreleased business data, anything that can't leave the building. NVIDIA's own pitch for local AI on RTX is that the data stays on your device with no internet required, and that's why most of my customers want one. Volume: if the machine runs for hours a day, cloud costs add up and the hardware wins within a year or two. Offline or bandwidth-limited work, which cloud services can't do at all.
One more honest note. If you already own a decent gaming tower, an AI build is often a graphics card and RAM decision, not a new-machine decision. Bring it in; the custom PC build page and this one share the same consultation.
An AI workstation and a video editing build share the same priorities. If you do both, I'll spec one machine for the pair.
What I See on the Bench in New Jersey
Composite examples, built from the kinds of jobs that come across my Somerville counter.
A Princeton graduate student's local LLM setup. Coursework required running open models on documents that couldn't be uploaded anywhere. The existing desktop's gaming card had too little memory, so models fell back to the CPU and answered at a crawl. The build went memory-first on the card, doubled the RAM, and left with the runtime installed and a test model confirmed on the GPU.
A Bridgewater small business's document pipeline. The office wanted to summarize and classify paperwork without a cloud contract. The work was CPU-heavy on the data side and modest on the model side, so the spec leaned toward cores, RAM and a big data drive with a mid-range card. On-site setup followed as a business client.
A Hillsborough hobbyist's image generation tower. High-resolution image batches were crashing a home-built gaming PC. The card's memory was the ceiling and the power supply had no headroom for a bigger card. That one became an upgrade, not a build: a higher-memory card and a properly rated ATX 3.x supply, tested under sustained load before it went home.
Bring the models you want to run and I'll tell you the tier that fits. The $150 consultation is credited in full toward the build when you approve the quote.
📞 Call (908) 428-9558Drop-off shop at 75 N Bridge St, Somerville NJ · Mon-Fri 10-5, Sat 9-2
Directions to Dave's Computers in Somerville, NJ
Downtown Somerville, one block off Main Street, behind Bank of America.
Dave's Computers, 75 N Bridge St, Somerville, NJ 08876Drop-off shop, Mon-Fri 10-5 and Sat 9-2. Street and municipal-lot parking around Main Street.
Directions to the ShopFrom Bridgewater
3 miles · about 10 minutes
Route 22 or Route 202/206 to the Somerville Circle, then Route 28 east (West Main Street) into downtown. Left onto N Bridge St.
Open in Google MapsFrom Hillsborough
5 miles · about 12 minutes
Route 206 north into Somerville, right onto West Main Street, then left onto N Bridge St.
Open in Google MapsFrom Bound Brook
4 miles · about 12 minutes
Route 28 west straight into downtown Somerville. Right onto N Bridge St.
Open in Google MapsFrom Piscataway
10 miles · about 20 minutes
I-287 north to Exit 17 (Route 202/206 south), then Route 28 east into downtown Somerville.
Open in Google MapsFrom Flemington
15 miles · about 25 minutes
Route 202 north to the Somerville Circle, then Route 28 east into downtown. Left onto N Bridge St.
Open in Google MapsFrom Princeton
18 miles · about 30 minutes
Route 206 north through Montgomery and Hillsborough into Somerville. Right onto West Main Street, then left onto N Bridge St.
Open in Google MapsTimes are typical drives outside rush hour. Call 908-428-9558 before a long drive if you want to confirm I'm at the counter.
Google Reviews
What Customers Say on Google
Live from the Dave's Computers Google listing. Tap any review to read it on Google Maps.
4.8
★★★★★★★★★★Based on 434 Google reviews
I have been going to Dave's Computers for years because he always fixes my problems. I also use his anti-virus and it is as good as any, if not better, than others that I would have to pay much more for. If you're having problems, go to Dave's. He doesn't break the bank and he solves the problems.
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Over the last decade or so, whenever I had a computer problem, I went to Dave. I recently had a very worrisome crash; the system failed to boot up. (I hadn't needed to use him for about 3 years.) I paid the "rush fee" on Saturday when dropping the machine off with the weekend agent. By Monday...
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"As a Broker of over 40 years in New Jersey I rely on my computer help", which is the artery to my success and business. Thank goodness Dave's is here for me with the messes I get into with scammers, land grabbers and just uneccesary things that I pick up. The most effective virus program have ever...
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I had previously tried to build my own PC to no success. Even though right now it is really tough to get a PC built due to the price increases with RAM’s, GPU’s and other parts because of AI, I still really wanted to get one for myself. I came across Dave’s Computers online and went in for a...
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AI Workstation Build Questions From NJ Customers
What people ask at the counter before they commit.
What is an AI workstation PC build and how is it different from a gaming PC?
An AI workstation is a desktop tower specced around running AI models locally: a graphics card chosen for memory capacity first, more system RAM than a gaming build, fast NVMe storage for model files and datasets, and cooling and power sized for hours of sustained load. A gaming PC shares the same parts list but is tuned for frame rates, so it often ends up with less GPU memory and less RAM than AI work wants.
How much does an AI workstation PC build cost in New Jersey?
AI workstation builds at my Somerville, NJ shop start at $2,500 as of this writing, and the price climbs with the GPU memory class you need. The $150 consultation is credited in full toward the build when you approve the quote. The quote states a performance tier and a price, and you get a written spec sheet at pickup.
How much GPU memory do I need to run a local LLM?
It depends on the model size and how compressed you're willing to accept it. Small assistant models fit in a mid-range card's memory. Mid-size models that feel close to a cloud service want the upper consumer memory class. The largest open models need professional-class memory or multiple cards. Tell me the models you plan to run and I'll spec around them.
Can I run Stable Diffusion on a regular gaming PC instead?
Often yes, at smaller image sizes and slower speeds. Tom's Hardware's Stable Diffusion benchmarks show cards with too little memory failing outright at higher resolutions where the same GPU family with more memory finishes the job. If you already own a gaming tower, a graphics card upgrade may be the right move, and I'll say so at the consultation.
Will you install the AI software I plan to use?
Yes. Name the runtime or app you use and I'll install it, load a model of your choosing, and confirm it runs on the graphics card rather than the CPU before pickup. Every build also leaves with Windows 11 installed, BIOS current, memory at its rated speed, and a stress test completed.
Is a cloud AI subscription cheaper than building a workstation?
For occasional use, yes, and I'll say so. A $2,500 or more build only pays for itself when you use it heavily, need your data to stay on your own machine, or work offline. If you run a few prompts a week, keep the subscription and spend the money on a solid general-purpose upgrade instead.
Sources and further reading
- NVIDIA, AI on RTX PCs: NVIDIA's overview of running AI locally on RTX graphics cards with data staying on the device and no internet required.
- Tom's Hardware, Stable Diffusion Benchmarks: GPU testing showing memory capacity limiting image generation at higher resolutions.
- Microsoft, Windows 11 Specifications and System Requirements: the official requirements list including TPM 2.0 and UEFI Secure Boot.
Build an AI Workstation in New Jersey That Fits the Models You Run
Bring your list of models, or bring the tower you already own and I'll tell you whether an upgrade gets you there. Builds start at $2,500, the $150 consultation is credited toward the build, and every machine leaves my Somerville bench tested under load with a spec sheet. It's all part of my custom PC repair and upgrade service in NJ.
📞 (908) 428-9558Mon-Fri 10am-5pm · Sat 9am-2pm · 75 N Bridge St, Somerville NJ · Drop-Offs Welcome