Quick answer
Updated September 2026RTX 4090, RTX 5090 or Mac Studio: which should I keep for local LLMs and which should I sell?
Keep the one whose memory matches the models you run: the 24GB RTX 4090 and 32GB RTX 5090 are fastest for models that fit in VRAM, and a Mac Studio with up to 512GB of unified memory is the only one that holds very large models on one box. Sell the other before the next launch. SellYourMac.ae buys all three for cash: WhatsApp the model and memory for a written AED quote, free pickup and same-day bank transfer.
- RTX 4090 24GB GDDR6X and RTX 5090 32GB GDDR7 are both bought outright.
- Every Mac Studio from M1 Max to M3 Ultra is bought, any memory tier.
- Cards are bench-tested and Macs are checked at your door before payment.
- Cash by bank transfer, spent on the replacement from any seller.
- One written figure per item; a card and a Mac go in the same pickup.
- Free pickup in Dubai, Abu Dhabi, Sharjah, Ajman and the Northern Emirates.
Key facts
- RTX 5090
- 32GB GDDR7, Blackwell architecture, launched 2025
- RTX 4090
- 24GB GDDR6X, Ada Lovelace architecture, launched 2022
- Mac Studio
- M4 Max (up to 128GB) or M3 Ultra (up to 512GB unified memory), 2025; M1 and M2 generations also bought
- What each is best at
- Cards: speed on models that fit in VRAM; Mac Studio: large models on one quiet box
- Quote validity
- 1-5 days, written on WhatsApp
- Pickup
- Free, all 7 emirates, anti-static packaging for cards, same-day in Dubai, Abu Dhabi, Sharjah and Ajman
- Payment
- Same-day UAE bank transfer or cash on collection
- Buyer
- SellYourMac.ae (Azizi Technologies), Dubai Media City, trading since 2013
This guide is for anyone in the UAE running language models at home or in a small studio who owns, or is about to own, more than one of the RTX 4090, the RTX 5090 and the Mac Studio, and needs to decide which to keep and which to sell. By the end you will know how the three compare on memory and speed, which models each one is right for, and how to get a written AED quote from SellYourMac.ae for the one that is leaving.
The three solve the same problem in different ways. The NVIDIA cards give raw speed for anything that fits in their 24GB or 32GB of VRAM; the Mac Studio gives a very large pool of unified memory that the chip can use almost like VRAM, so it holds models the cards cannot. Most builders move between them as their models grow, which is why all three keep a strong second-hand market.
How do the RTX 4090, RTX 5090 and Mac Studio compare on memory?
Memory decides which models each can run at all. The RTX 4090 carries 24GB of GDDR6X, enough for the mid-size models most people run locally at 4-bit. The RTX 5090 carries 32GB of GDDR7, which adds room for longer context and tighter runs of larger models. A Mac Studio carries 36GB to 128GB on the M4 Max and up to 512GB on the M3 Ultra, and because it is unified memory the chip can use almost all of it for the model. That is why a Mac Studio runs models that neither card can hold, and why very high memory Studios are the units other AI builders search for second-hand.
| Option | Memory | Best for | Keep or sell when moving up |
|---|---|---|---|
| RTX 4090 | 24GB GDDR6X | Mid-size models at speed, gaming | Sell when you move to 32GB or unified memory |
| RTX 5090 | 32GB GDDR7 | Mid-size models fastest, more context | Keep for speed; sell only if you leave GPUs |
| Mac Studio M4 Max | 36GB to 128GB unified | Large models on one quiet box | Sell when you move to an Ultra |
| Mac Studio M3 Ultra | 96GB to 512GB unified | Very large models, GLM-5.2 class | Keep; the top single-box tier |
Which is faster for models that fit in memory?
The cards. For any model that fits in VRAM, the RTX 5090 generates tokens fastest because of its memory bandwidth, the RTX 4090 sits behind it, and the Mac Studio is slower per token. The Mac wins only when the model is too large for a single card, where it can run something the cards simply cannot load. So the practical rule is: if everything you run fits in 24GB or 32GB, keep a card; if your models have outgrown a card, keep the Mac.
Which one should you keep, and which should you sell?
Keep the one that matches your next year of models, not your last year. A builder moving from mid-size to large models keeps the Mac Studio and sells the card; a builder who stays on mid-size models but wants more speed keeps the RTX 5090 and sells the RTX 4090; a builder who is consolidating two boxes into one keeps whichever holds the largest model they run and sells the other. Owning both a card and a Mac Studio is rarely worth it once the models settle, because the idle one loses value at each launch.
- Moving up in model size: keep the Mac Studio, sell the card
- Staying mid-size, wanting speed: keep the RTX 5090, sell the RTX 4090
- Consolidating: keep the one that holds your largest model
- Idle hardware: sell it before the next NVIDIA or Apple launch
What is the one you sell worth in the UAE?
For a card, the figure follows the model, the board partner, use history, coil whine, fan health and the box. For a Mac Studio it follows the chip tier, unified memory, storage and port condition. SellYourMac.ae writes a figure for each from those details on WhatsApp, then bench-tests the card or checks the Mac at your door before paying, so the figure in the thread is the figure you receive. Cards are collected in anti-static packaging and Macs in padded boxes the courier brings.
When is the best time to switch between a GPU and a Mac Studio?
Before the next launch on either side, and as soon as you have decided. GPU figures step down when a new GeForce generation ships and Mac Studio figures step down when Apple refreshes the line. The SellYourMac.ae quote holds for 1-5 days, which is long enough to accept it, order the replacement from any seller, move your weights and environments across, and hand the old hardware to the courier once the new box is running.
How do you sell a GPU or Mac Studio from home in the UAE?
Five steps, usually one day. For a Mac, sign out of iCloud and turn off Find My and keep a backup; for a card, power down, remove it cleanly and keep the box if you still have it.
WhatsApp the details
Send the card model and board partner, or the Mac Studio chip, memory and storage, with a photo and your UAE area to SellYourMac.ae on WhatsApp.
Receive the written AED quote
A figure in the thread with every adjustment shown. It holds for 1-5 days with no obligation, long enough to order the replacement first.
Book a free pickup window
Any address in Dubai, Abu Dhabi, Sharjah, Ajman, Ras Al Khaimah, Fujairah or Umm Al Quwain; the courier brings anti-static packaging for cards.
Test at your door
A courier with company ID bench-tests the card or checks the Mac's serial, memory and storage against the quote while you watch.
Same-day payment
UAE bank transfer on verification, or cash on collection if requested when booking. A Mac is erased and Activation Lock cleared at the desk.
