The KFA2 GeForce RTX 4080 SG has an influence draw of 320 watts, which is on par with Nvidia’s Founders Version card. Whereas energy dealing with remained unchanged in comparison with the GeForce RTX 3080, the RTX 4080 carried out considerably higher than its predecessor in our checks. Energy effectivity is improved by a powerful margin with Ada Lovelace and the 4 nm node. The facility goal of the KFA2 GeForce RTX 4080 SG has been elevated by as much as 31 p.c, permitting the graphics card to devour as much as 420 watts by itself. Utilizing the 12VHPWR connector (included within the field as an adapter with 3×6+2 pin PCIe connectors), the GPU’s energy draw continues to be inside allowable limits. To keep away from issues with the facility provide, we advocate utilizing three separate cables to attach the board to the PSU.
In the course of the stress take a look at, the KFA2 GeForce RTX 4080 SG effortlessly reached 320 watts and we recorded a GPU temperature of round 74°C (165°F). Nonetheless, the GPU hotspot temperature was as excessive as 93°C (199°F) beneath load. VRAM stayed surprisingly cool at 58°C (136°F). The KFA2 board depends on a big heatsink with three 102mm axial followers to dissipate warmth. Optionally, an extra 102 mm fan might be put in on the again of the cardboard. Sadly we couldn’t take a look at it resulting from incompatibility with our motherboard. The followers made a quiet buzzing sound that could possibly be heard even when the pc case was closed (42 dB(A) noise by our measurement). Once we elevated the facility restrict, the noise ranges from the GPU elevated to 43 dB(A). Throughout gameplay (The Witcher 3, 1080p, Extremely preset), our setup produced a nice 36 dB(A). We additionally did not discover any annoying coil buzz.
When it comes to energy consumption, the KFA2 GeForce RTX 4080 SG makes a great impression and goes head-to-head with the AMD Radeon RX 7900 XT, a card that gives considerably decrease efficiency. The KFA GeForce RTX 3080 SG we reviewed earlier required extra energy beneath load. In comparison with the KFA2 GeForce RTX 4090 SG, the smaller Ada Lovelace graphics card makes use of 30 p.c much less energy beneath load. It is price noting, nonetheless, that the RTX 4090 is rated at 450 watts and affords considerably larger efficiency.
The producer recommends utilizing a 750-watt PSU. This suggestion relies on a system with AMD Ryzen 9 5900X. Nonetheless, in case your system has a Ryzen 9 7000 Sequence processor or an Intel Raptor Lake processor, you need to contemplate the upper energy utilization of those CPUs beneath load. Due to this fact, we advocate pairing the graphics card with an 850-watt PSU.
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