Description
Dual RTX 3090 Workstation for AI, Machine Learning & Startups
The Dual RTX 3090 Workstation from Custom Lux PCs is a high-performance, cost-effective solution for startups, AI developers, researchers, and businesses that need serious GPU computing power without the high cost of professional workstation GPUs or cloud-based AI infrastructure.
Powered by 2× NVIDIA RTX 3090 graphics cards, this custom AI workstation delivers 48GB of total GPU VRAM, with 24GB of VRAM available on each GPU. Combined with an Intel Core Ultra 9 285K processor and 128GB of DDR5 RAM, this system is designed to handle demanding AI and machine learning workloads, large datasets, local LLM inference, model development, and GPU-accelerated applications.
For startups building AI products and companies looking to bring AI workloads in-house, a Dual RTX 3090 AI workstation provides the computing power and flexibility needed to accelerate development while reducing dependence on expensive cloud GPU services.
Dual RTX 3090 Workstation Specifications
- CPU: Intel Core Ultra 9 285K 24 core 24 thread Processor
- GPU: 2× NVIDIA GeForce RTX 3090 24GB
- Total GPU VRAM: 48GB
- RAM: 128GB DDR5 5600 MT/s
- Motherboard: MSI Z890 MPG Carbon WiFi
- PCIe Configuration: x8/x8 PCIe slots for high-bandwidth dual-GPU operation
- Storage: 2TB Western Digital/Crucial PCIe Gen 4 NVMe M.2 SSD
- Maximum Storage:Â 20+ TB (Contact us for options)
- Case: Black Antec C8 with 10 RGB high-airflow fans
- Power Supply: 1600W 80+ Gold PSU with 10-year manufacturer warranty
- CPU Cooler: Arctic Liquid Freezer 360mm AIO liquid cooler
- Networking: WiFi and Bluetooth
- Operating System: Ubuntu 24.04 LTS or Windows 11 Pro
- Other OS Options: Any operating system upon request, subject to hardware compatibility
- NVIDIA Drivers: Installed and configured
- CUDA Environment: Configured for Windows and Linux
- Warranty: 3-year Custom Lux PCs warranty plus applicable manufacturer warranties
- Shipping: Free shipping
- Technical Support: Free lifetime technical support
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Professionally Tested & Stress-Tested
Every Dual RTX 3090 workstation built by Custom Lux PCs is thoroughly tested before it leaves our facility.
We provide benchmark results and maximum temperature results from our testing process, including:
OctaneBench
Dual-GPU performance and sustained workload testing.
FurMark
GPU stability and thermal testing.
Cinebench or S-TUI
Two-hour CPU stress testing on Windows or Linux.
MemTest86
Comprehensive RAM stability testing.
CrystalDiskMark
SSD performance and storage speed testing.
Our RTX 3090 graphics cards are certified refurbished, repadded, and repasted before installation. All other components are new.
Each GPU is tested under sustained workloads, with maximum temperatures typically reaching approximately 70–73°C under full sustained load, depending on ambient conditions and workload.
We build and test each workstation to ensure it is stable and reliable for demanding AI inference, machine learning, rendering, and long-duration workloads.
We build and test each workstation to ensure it is stable and reliable for demanding AI inference, machine learning, rendering, and long-duration workloads.
48GB of VRAM for AI & Machine Learning
The Dual RTX 3090 configuration provides 48GB of combined GPU VRAM, making this workstation an excellent platform for AI development, local LLMs, machine learning, and other GPU-intensive applications.
With 24GB of VRAM per RTX 3090, the system is well suited for workloads that require substantial GPU memory and parallel processing capabilities.
Depending on the software, model architecture, quantization, and configuration, the workstation can be used for:
- Local LLM inference
- AI model development
- Machine learning
- Deep learning
- RAG (Retrieval-Augmented Generation)
- AI agents and local assistants
- Computer vision
- Multimodal AI
- Model experimentation
- AI image generation
- AI video generation
- GPU-accelerated data science
- 3D rendering
- Scientific computing
- Model training and fine-tuning
The dual-GPU configuration provides massive parallel computing capability, allowing compatible applications to distribute workloads across both NVIDIA RTX 3090 GPUs for faster processing and experimentation.
Important: Two GPUs do not automatically create a single 48GB VRAM pool for every application. Software must support multi-GPU execution, model sharding, or other techniques to utilize the memory of both GPUs. Applications that support multi-GPU workloads can take advantage of the system’s two RTX 3090 GPUs.
Built for AI Startups & Growing Businesses
AI startups need powerful hardware that can keep up with rapid development without consuming a massive portion of their technology budget.
This Dual RTX 3090 AI workstation provides an affordable path to high-performance local AI computing.
Instead of paying continuously for cloud GPU instances, your company can own dedicated AI infrastructure that can be used for development, testing, inference, and experimentation.
This workstation is ideal for startups and businesses that need to:
- Develop and test AI applications
- Run local large language models
- Build RAG applications
- Create private AI assistants
- Develop AI agents
- Experiment with open-source models
- Run machine learning frameworks
- Process large datasets
- Develop computer vision applications
- Test AI models before production deployment
- Run AI workloads on-premises
- Reduce reliance on recurring cloud GPU costs
With 128GB of DDR5 system memory, a high-performance Intel Core Ultra processor, and two 24GB RTX 3090 GPUs, this workstation provides the combination of CPU, RAM, and GPU resources needed for demanding AI development environments.
Powerful Intel Core Ultra 9 285K Processor
At the heart of this Dual RTX 3090 workstation is the Intel Core Ultra 9 285K, a high-performance desktop processor designed for demanding professional workloads.
The CPU provides the processing power needed to support AI development, data preparation, multitasking, software development, and other CPU-intensive tasks while the dual RTX 3090 GPUs handle accelerated workloads.
With 128GB of DDR5 5600 MT/s RAM, the system also provides substantial memory capacity for working with large datasets, development environments, containers, virtual machines, and other demanding applications.
Need NVLink?
Need NVIDIA NVLink support for your AI or compute workload?
We can configure your Dual RTX 3090 workstation with NVLink compatibility for an additional cost.
Request a custom NVLink configuration today.
Call or text: 732-284-6803
Customize Your Dual RTX 3090 AI Workstation
Every AI workload is different. If you need more RAM, additional storage, a different CPU, a different operating system, specialized networking, or another configuration, we can customize your workstation to meet your requirements.
Request a Build for custom configurations.
Text us now at 732-284-6803 to discuss your requirements with a real AI workstation specialist.
Why Choose Custom Lux PCs?
When your business depends on reliable computing hardware, you need more than a box shipped from a large manufacturer.
Custom Lux PCs specializes in high-performance AI, machine learning, and professional workstations designed around the specific needs of each customer.
Direct Expert Support
No endless support tickets and no outsourced technical support. Get direct access to a real person based in the United States through phone, text, or email.
Competitive Pricing
Get high-performance components and workstation configurations at competitive prices without paying unnecessary enterprise premiums.
One-on-One Customization
Work directly with an expert to configure your Dual RTX 3090 workstation around your AI, machine learning, business, or professional workload.
Fast Build Times
Most systems can be built and shipped in approximately one week or less, depending on component availability and customization.
Extensive Hardware Selection
From RTX 3090 and RTX 5090 systems to professional NVIDIA RTX Pro GPUs and AMD Threadripper platforms, we can build the right workstation for your specific requirements.
Build Your Dual RTX 3090 Workstation Today
If your startup or business needs powerful, affordable AI computing, the Dual RTX 3090 Workstation from Custom Lux PCs delivers an exceptional combination of GPU performance, 48GB of total VRAM, 128GB of system memory, and professional workstation reliability.
Develop AI applications. Run local LLMs. Build private RAG systems. Experiment with machine learning. Develop AI agents. Process large datasets. Run GPU-accelerated applications.
Get powerful local AI computing without relying entirely on expensive cloud GPU infrastructure.
Ready to get started?
Request a custom Dual RTX 3090 workstation from Custom Lux PCs today.
Call or text: 732-284-6803
Read Why Custom Lux PCs is the best choice in AI/ML workstation PCs
Use Custom Lux PCs as Your Business Workstation Provider
Let’s get started with the best purchasing experience. Contact us today.
Josh Lipsmeyer –
I have been using the custom server built by Custom Lux for the last two months, and my experience has been fantastic. The first thing you will find is that Custom Lux has the best customer service I have ever experienced. Knowledgeable, prompt, helpful, and very friendly. My server arrived precisely as communicated and in perfect condition. The performance over the last two months has been peak. Absolutely could not have been a better experience. I will certainly use Custom Lux in the future for custom builds, and I will continue to recommend to my friends and colleagues who have careers and/or interest in A.I.
Joe –
Ordered the Dual 3090 build for Llama 3b and I could not be happier. The performance is great and the full model only uses about 60% of the GPUs. The system is quiet and it never overheats. I don’t care for the lights but it’s there if you’re into it! I strongly recommend this build if you’re looking for a budget friendly AI machine. The owner is great too, he personally reached out to see if I needed anything customized.
Ray Kenny –
Was an awesome and smooth experience, I’m glad I came across their page. You can easily message or text and have a real conversation instead of dealing with bots. I couldn’t be more happy with this PC. I use it for gaming and editing. I Would highly recommend
Atef Helmy –
I got this build with NVLink which made it $400 more and I am very happy with the performance. Pat reached out and made sure I got the OS I wanted and he even helped me troubleshoot a software related issue I was having after I set it up. It’s been 5 months and this thing is a tank!
Will F. –
I started by getting another system that had 2 3090s and it overheated a lot and it turned off. I went to Custom Lux and the guy was very helpful and assured me that this build was different. He was right. The temps are low for both GPUs, around 60-75 under full load. The 10 fans are quiet and also get the job done to cool this monster PC. I love it and it helps me run my LLMs and do all of my work.
Joan Disla –
If you are looking for a custom-built AI workstation, stop searching now. Custom PC Lux is, without a doubt, the best of the best in the industry, and the owner, Pat, is the reason why.
​Pat is the definition of G.O.A.T. (Greatest Of All Time) when it comes to all aspects of his work. Not only is the PC building craftsmanship top-tier and flawless, but his commitment to customer service and guiding new PC comers to the world of gaming is absolutely unmatched.
​He took the time to understand my needs, answered all my questions, and made a potentially confusing process simple and exciting. It is really hard these days to find a business that actually cares about the person and just not the money. Pat exemplifies genuine dedication to the customer experience.
​By far, I wholeheartedly recommend Pat and Custom PC Lux. This is the gold standard for personalized tech service.
​THANKS PAT!!
Luke Moskwinski –
I had an exceptional experience working with Pat at Custom Lux PCs. He built a high-performance workstation perfectly tailored for my local AI model development. His pricing is competitive, and his commitment to service—including personal delivery—is outstanding. Having a local professional available for ongoing support and future upgrades provides incredible peace of mind. I highly recommend his services.
Ethan Peiffer –
Pat worked with me to choose the right hardware for my PC and helped me sort out a few things as I was getting set up. I’m really happy with the build and impressed with the personalized support along the way. I highly recommend.
Daviod Merrick –
Stumbled across a dual 3090 machine offered by Lux and was SO happy with every part of the sale. The owner personally reached out and helped me through the process, and the machine arrived with everything down to the BIOS configured for my AI workloads. Just needed to pop the GPUs in. Hope to buy another again soon.
Kibaek Kim –
I had an excellent experience with Custom Lux PCs, especially working with Patrick. Their customer service truly goes above and beyond. This was a big purchase and I felt comfortable the entire time .
After purchasing my computer, I ran into an intermittent GPU issue that ended up being my fault because I did not plug the power cable in all the way, but Patrick was incredibly responsive and helpful throughout the entire process. With prompt phone support, we were able to quickly identify and resolve the problem. What really stood out was the consistent follow-up—he checked in regularly with weekly emails to make sure everything continued running smoothly.
I highly recommend Custom Lux PCs to anyone looking for both high-quality systems and outstanding support.
Adam Wilson –
Customer support is easy to get in touch with. I text the websites support number from work to ask a question about availability at 4am and they responded and even offered a free CPU upgrade on the build I was interested in. It was a pleasent experience that earned my business. The build is fantastic and I have no issues.