Most PC building advice on the internet is written for markets where components arrive continuously, prices track a global reference within a few percent, and anything out of stock is back within a week. None of that describes Tunisia. Here, parts arrive in discrete import batches, each priced against the exchange rate on the day it was ordered, and a component can sit at one retailer for months at a price that no longer reflects what a competitor paid for a newer shipment. That single structural fact changes how you should approach a build.
This guide covers how to allocate a budget across components, which parts reward extra spending and which do not, and the specific local dynamics that determine what you actually pay. It assumes you are building a machine primarily for gaming, though most of the reasoning applies to general-purpose and content-creation builds too.
How to split a budget across components
The most common mistake in a first build is spreading money evenly. Components do not contribute equally to gaming performance, and a balanced-looking parts list is usually a badly balanced machine. The following allocation is a starting point rather than a rule, but it reflects where each dinar buys the most frame rate.
| Component | Share of budget | Why |
|---|---|---|
| Graphics card | 35–40% | The single largest determinant of gaming performance at any resolution above 1080p |
| Processor | 15–20% | Matters for frame rate floors and 1080p, but hits diminishing returns quickly |
| Motherboard | 8–12% | Buy for the features and sockets you need, not for the marketing tier |
| Memory | 7–10% | 16 GB in two sticks is the practical baseline; capacity beyond that rarely helps games |
| Storage | 7–10% | One NVMe SSD is transformative; a second drive is a convenience |
| Power supply | 8–10% | Underspending here is the most expensive mistake available |
| Case and cooling | 8–12% | Airflow is a performance component, not a cosmetic one |
Two things about this table are worth stating explicitly. First, the power supply share is not padding. Second, the case share assumes you are buying for airflow rather than for looks — a point returned to below.
The graphics card decision
Start from the resolution and refresh rate you will actually play at, not from the card. A card that delivers a comfortable frame rate at 1080p may be entirely inadequate at 1440p, and the difference is not linear — moving from 1080p to 1440p raises the pixel count by roughly 78%, and to 4K by around 300%.
Video memory deserves particular attention in 2026 because the floor has moved. Texture budgets in recent releases have grown faster than the memory allocations on mid-range cards, with the result that a card can have ample raw processing power and still stutter because it is running out of VRAM. Eight gigabytes remains workable at 1080p; at 1440p it has become the point where you start making compromises, and for a machine you expect to keep for several years, more headroom is worth paying for.
Do not buy a graphics card without checking two physical numbers: its length against your case's published clearance, and its power draw against your supply. Both are covered in more detail below and in our dedicated guides.
Where extra money stops helping
Several components have a clear point past which additional spending buys almost nothing measurable in games.
- Processor: above the mid-range, extra cores and clock speed produce gains you will struggle to perceive in games at 1440p or above, because the graphics card is the limiting factor. If you also compile code, render video or stream, the calculus changes.
- Memory speed: enabling the XMP or EXPO profile matters enormously. Paying a premium for a kit rated several hundred megahertz higher than a cheaper one matters very little.
- Memory capacity: 16 GB across two sticks is the baseline. 32 GB is genuinely useful for content creation and heavy multitasking; for gaming alone it is largely insurance.
- Motherboard: beyond having the right socket, enough memory slots, an M.2 slot wired for PCIe, and adequate power delivery for your processor, most of what you pay extra for is connectivity you may never use.
- Storage speed: the difference between a good NVMe drive and an excellent one is measurable in benchmarks and close to invisible in normal use. The difference between an SSD and a mechanical drive as your system disk is enormous.
Where underspending is expensive
The inverse list is shorter but more important, because these are the choices that cause problems rather than merely fail to help.
The power supply
A power supply is the one component whose failure can damage everything connected to it. It is also the component where the gap between a reputable unit and a cheap one is least visible on a spec sheet: two units can both claim the same wattage and the same efficiency certification while differing enormously in the quality of their internal components and the honesty of their rating.
Size the unit so that your build draws roughly 60–70% of its rated capacity under load. That is not superstition about "headroom" — it is where most supplies are at their most efficient, and it leaves room for the transient power spikes that modern graphics cards produce. Those spikes last milliseconds, never show up in an average-draw figure, and are entirely capable of tripping the over-current protection on a supply that looked adequate on paper.
Case airflow
A case is not a cosmetic choice. A sealed enclosure with a solid front panel and one exhaust fan will run components ten to fifteen degrees hotter than a mesh-fronted case with the same parts inside. Modern processors and graphics cards respond to heat by reducing their own clock speeds, so a poorly ventilated case does not just run hot — it silently returns less performance than you paid for.
The system drive
Installing an operating system on a mechanical hard drive is, in 2026, the single largest source of perceived slowness on an otherwise capable machine. If a budget forces a choice between a larger mechanical drive and a smaller SSD, take the SSD.
The local market: what actually determines your price
Component prices in Tunisia vary between retailers far more than they do in markets with continuous supply, and the variation is not random. Understanding where it comes from tells you when to buy and when to wait.
- Import batches are priced at the exchange rate of the day they were ordered. A retailer holding stock bought at a favourable rate can undercut a competitor who restocked later, on the identical part.
- Old stock is rarely repriced downward. Retailers who paid more for a batch generally hold their price rather than take a loss, which means the highest listing for a part can persist for months.
- Availability moves independently of price. A part being cheapest is uncorrelated with it being in stock, and both change without notice.
- New releases arrive at a premium that decays over the following months as more batches land and competition appears.
The practical consequence is that comparing retailers is not an optimisation for the unusually diligent — it is the largest single saving available on a Tunisian build, and it is free. Price spreads of fifteen to twenty percent on identical components are routine, and they are entirely a function of which batch a retailer is selling from.
It also means timing has more leverage here than elsewhere. If a component you want is listed by only one retailer, waiting a few weeks for a second listing to appear frequently produces a better price than any amount of negotiation.
A sensible build order
Choosing components in the right sequence prevents most compatibility problems, because each decision constrains the next.
- Decide your resolution and target frame rate. Everything else follows from this.
- Choose the graphics card that meets that target within your budget share.
- Choose a processor that will not hold that card back, and no more.
- Choose a motherboard with the right socket for that processor, verifying that the chipset supports its specific generation.
- Choose memory of the type the motherboard accepts, in two modules rather than one.
- Choose storage — one NVMe SSD large enough for the system and your regular games.
- Add up the processor and graphics card power draw, add roughly 30%, and choose a power supply at or above that figure.
- Choose a case last, checking it against the motherboard form factor, the graphics card length and the cooler height.
Our PC Builder performs the compatibility checks in that list automatically as you add components, calculates the power figure in step seven for you, and shows every tracked retailer price for each part side by side. It will not, however, decide your resolution target — that first step is yours.
Common mistakes worth avoiding
- Buying a single memory stick instead of two. Dual-channel operation is a free performance gain and a single stick forfeits it.
- Pairing a high-end graphics card with an entry-level processor, or the reverse. Both waste money, in different directions.
- Forgetting to enable XMP or EXPO in the BIOS after building, leaving fast memory running at the platform's slow default.
- Choosing a case on appearance and discovering afterwards that the graphics card is fifteen millimetres too long.
- Assuming a motherboard will POST with a brand-new processor without a BIOS update. On recent platforms this is a real risk worth confirming before ordering both together.
- Treating the cheapest listing as the whole decision without checking whether it is actually in stock.
Where to go from here
If you have a rough budget and a resolution target, the most useful next step is to open the PC Builder and start assembling a parts list. Compatibility is validated as you go, so you will find out immediately if a combination does not work, and each component shows every tracked retailer price so the comparison work is already done.
For the individual decisions in more depth, our guides on choosing a power supply, understanding bottlenecks, and DDR4 versus DDR5 cover the reasoning behind steps three, five and seven above.