Up front: matched AIO sizing keeps Ryzen and Core CPUs out of throttle. For the spec choice carries through to long-term ownership and resale. Inside: radiator size, fan choice, and SA ambient notes. ZAR pricing, stock, and Evetech context all included.
If your CPU consistently exceeds 90 degrees Celsius during gaming sessions lasting over an hour, the most likely causes are inadequate cooler TDP headroom for boost clocks, degraded thermal paste, or insufficient case airflow. These three areas cover over 90% of sustained gaming heat issues.
CPU manufacturers list a base TDP that dramatically underestimates real-world power consumption under sustained boost conditions. A Ryzen 7 7800X3D with a 120W base TDP can draw 162W during all-core gaming bursts, and the Core i7-14700K with a 125W TDP can hit 235W briefly during boost. If your cooler is rated only to the base TDP figure, it is undersized for actual gaming loads. Check the maximum boost power figure in your CPU's spec sheet, not the base TDP, and ensure your cooler's thermal capacity exceeds that number. For CPUs in the R4,000 to R8,000 range, a cooler rated below 150W sustained is inadequate for prolonged gaming sessions at full boost.
Thermal paste begins to degrade from the moment it is applied, and the rate of degradation accelerates with frequent thermal cycling from gaming sessions. Paste that is two or more years old can develop dry patches or micro-cracking that increase thermal resistance by 5 to 10 degrees Celsius compared to fresh compound. This is a free fix: a tube of quality thermal compound costs R100 to R180 at Evetech, and re-pasting the CPU cold plate takes under 15 minutes. Also check that the cold-plate screws are still seated evenly; coolers can develop a slight tilt over time if mounting screws were unevenly tightened during installation, creating a gap on one side of the IHS that inflates temperatures significantly.
A poorly ventilated case converts the CPU cooler's exhaust heat into elevated ambient air, which then recirculates through intake fans and feeds warmer air back to the cooler. This creates a thermal compounding effect where temperatures rise incrementally through a gaming session rather than stabilising. The immediate solution is to add a front intake fan if one position is vacant, or to confirm that existing case fans are oriented correctly, intake at front, exhaust at rear and top.
Before buying a new cooler, run a CPU stress test like OCCT or Prime95 for 30 minutes while monitoring temperatures in HWiNFO64. If temperatures plateau at 85 to 88 degrees Celsius and stay stable, your cooler is coping. If they keep climbing past 90 degrees Celsius without stabilising, the cooler is genuinely undersized. This distinction saves spending money on the wrong fix.
No. Most modern gaming CPUs, including Ryzen 7000, Ryzen 9000, and Intel 14th Gen, are designed to operate safely up to 95 degrees Celsius. Sustained temperatures above 90 degrees Celsius during gaming are a sign the cooler is working hard but not failing. Temperatures above 95 degrees Celsius that trigger clock speed reduction (throttling) indicate an undersized cooler.
In most cases, yes. Gradual temperature increases over months or years on a build that previously ran cooler are almost always caused by thermal paste degradation rather than a hardware fault. A fresh paste application frequently recovers 5 to 10 degrees Celsius of thermal headroom.
Start with case fan orientation and airflow first; it costs nothing to verify. Then re-paste if paste is more than 18 months old. Only if temperatures remain problematic after both adjustments should you consider a cooler upgrade. The sequence saves potentially unnecessary hardware spend.
CPU running too hot during gaming sessions? Browse the CPU cooler range at Evetech to find a correctly sized solution for your processor and ambient conditions.
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