How to Buy Computer Parts on Lamington Road

The short version

Know the exact model number before you go. Get every quote in writing with the date on it. Confirm the GST invoice, the warranty term and who honours it before you pay, not after. Check the seal and the serial number at the counter. If a seller wants to swap your chosen part for "same thing, better price", find out precisely what changed.

Prices in the market move week to week and stock moves daily, so anything you read online — including on this site — needs confirming on the day.

Before you leave home

Half an hour of preparation is the difference between a good trip and a return journey.

• Write down the full model number — Not "16GB DDR5" but the exact kit: brand, capacity, speed, latency, part number. Two sticks that look identical on a shelf can be a generation apart.
• Know what it has to work with — Motherboard model, CPU socket, existing RAM, power-supply wattage, cabinet size. Photograph the motherboard model printed on the board if you are unsure.
• Decide your acceptable alternatives in advance — If your first choice is out of stock you will be offered something else on the spot. Deciding what you would accept while you are calm is much better than deciding at the counter.
• Set a real budget, including the bits people forget — Thermal paste, a cable, an adapter, an OS licence, and the cost of getting home with a large box.
• Ring ahead — Stock listed anywhere can be gone by the time you arrive. A phone call turns a two-hour trip into a confirmed collection.

• Check what is in stock here first

How to compare two quotes properly

Two prices for "the same" part are usually not comparable. These are the lines that actually differ.

Ask for both quotes in writing, on paper or over WhatsApp. A seller unwilling to put a price in writing has told you something useful.

Checking the item is what it claims to be

Do this at the counter, before payment, while the seller is still motivated to help.

• The seal, and whether it has been opened — Retail packaging is usually sealed. A resealed box is visible if you look at the adhesive. Open-box is fine when disclosed and priced accordingly.
• The serial number on the box matches the unit — And that the same serial goes on your invoice. Without that link the warranty claim is much harder later.
• The model on the label matches the model on the quote — Character by character. This is where most substitutions are discovered — or not discovered.
• Accessories and contents are present — Cables, brackets, screws, adapters, manuals. Missing items are much easier to raise now than tomorrow.
• The warranty is registerable — Many manufacturers let you check warranty status from the serial number on their own website. You can do this on your phone at the counter.

Red flags worth walking away from

Pressure to change the model with no explanation of what changed. Refusal to give a GST invoice, or a lower "cash price" that comes without one — that lower price is also a price with no warranty route and no proof of purchase.

A warranty described only as "one year warranty" with no answer to "from whom". A price that changes between agreeing and paying. An unsealed box presented as new. Being told a compatibility question is not a problem, without being told why.

None of these mean a shop is dishonest. All of them mean you do not yet have the information you need, and any seller worth buying from will simply give it to you when you ask.

Compatibility, in the order things actually go wrong

Roughly in the order our workshop sees them come back.

• CPU socket and motherboard chipset — The socket has to match, and the chipset has to support that specific processor — sometimes only after a BIOS update, which needs a working CPU to perform.
• RAM generation and the board — DDR4 and DDR5 are not interchangeable and do not fit each other physically. Speed above what the board supports simply runs slower.
• Graphics card length and cabinet clearance — Measure. A three-slot card that is 20mm too long is 20mm too long, and the drive cage is usually what it hits.
• Power supply wattage and connectors — Total draw plus headroom, and the right connectors physically present. Modern cards may need a 12V-2x6 connector or a specific adapter.
• Cooler height versus side panel — The other measurement people skip, and the one that stops the case closing.
• Storage: M.2 is a shape, NVMe is a protocol — An M.2 slot may be SATA-only, NVMe-only or both, and the key and length must match. This is the single most common wrong purchase we see.
• Laptops are not desktops — Many laptops have soldered RAM, a single upgradeable slot, or no upgrade path at all. Check your specific model before buying anything for it.

• Check a build for compatibility automatically
• Talk it through with us first

Getting there, and getting home

The market runs along Lamington Road in Grant Road East. The nearest stations are Grant Road and Mumbai Central, both a short walk. Most shops keep similar hours and many close on Sundays — check before travelling, particularly on public holidays.

Our own counter is open Mo-Sa 10:00-21:30 at Shop No. 2, Lamington Road, Grant Road East.

Carry a bag if you are buying a cabinet or a monitor; the street is busy and boxes are awkward. Keep payment simple and traceable — a UPI or card payment against a GST invoice gives you a record, and a record is what makes a warranty claim straightforward.

When to stop and ask a technician

Some jobs are not worth doing yourself, and a few are not safe to. Stop if you are being asked to update a BIOS to make a new CPU work and you have no second processor; if a laptop needs full disassembly to reach the part; if the machine has a swollen battery, liquid damage or any smell of burning; or if data on the drive matters and has not been backed up.

Power supplies are never opened. There are capacitors inside that hold a dangerous charge long after the unit is unplugged, and nothing serviceable to reach.

• Our repair and diagnostics service
• Track an existing repair

About this guide

Written and reviewed by the counter and workshop team at RJ Digital Alliance, who trade in this market and see the consequences of the mistakes above every week.

We sell computer parts, so treat this as advice from an interested party and check it against what other sellers tell you — a shop that gives you a checklist you can use against it is a shop that expects to pass. Nothing in this guide requires you to buy from us, and the checks apply to every seller on the street.

If something here is wrong or out of date, please tell us at Support@rj-quantum.com and we will correct it.

Questions people ask