For the next generation, Microsoft has taken the low-risk route. The size of the casing, its attendant cooling assembly, plus the utilisation of a large external power brick (confirmed at 250W at a recent press trip) reveals a philosophy of putting reliability ahead of the looks of the product. On the other hand, Sony wants to have its cake and eat it. PlayStation 4 is obviously smaller, the power supply is integrated into the box, and the cooling assembly looks considerably less substantial than its Xbox One equivalent, with a patently smaller fan. Bearing in mind the more powerful GPU and the more demanding GDDR5 RAM, Microsoft's contention is that all of these factors will make the PS4 much hotter and louder than its alternative.
The reality is that Sony has done a pretty good job here. We'll get to the metrics in a moment, but first impressions are certainly reassuring. On start-up, the hardware is exceptionally quiet, but as you progress into gameplay, volume and heat does start to increase. PS4 also draws a fair amount of juice too - 80W at idle on the front-end menus (the "PlayStation Dynamic Menu" to give it its proper name), 95W based on in-game video playback, and around 110-120W during gameplay - that's about 10-20W more than the first release of the "Slim" PlayStation 3. Curiously though, bringing up the menu system while in-game sees another leap in power draw - up to the maximum of 140W.
Very little was known about the construction of the retail PlayStation 4 and there has been plenty of speculation on how Sony could pack so much power into so small a chassis. The firm released its own teardown, initially published by Wired.
The figures sound meaty but the reality is that PlayStation 4 remains fairly discreet throughout general gaming - easily quieter than a launch PS3 overall, but not quite as unobtrusive as the latest PS3 Super Slim model (when its Blu-ray drive is inactive, at least). Only when you run a game and then move to the menus does the system start to kick out some serious heat. We measured 50-degrees Celsius venting from the rear (better out than in, we say) with the casing itself heating up to 45 degrees - that's approaching launch PS3 territory.
We ran a series of tests using an infra-red thermometer that we pointed at the "hot spot" area on the casing, where temperatures were consistently at their highest. We also used a basic noise meter to get an idea of the loudness of the system. Conditions weren't totally ideal - ambient noise was 40dB, but the impact of the fans was lessened considerably just one metre off and barely noticeable at all at three metres. The 'close' measurement is a literally a case of measuring the noise direct from the fan exhaust, where the PS4 is likely to be at its noisiest.
Code:
Idle Blu-ray Gaming Game + UI
Max Temp 40 Degrees Celsius 41 Degrees Celsius 44 Degrees Celsius 45 Degrees Celsius
Power Draw 80W 100W 131W 140W
Noise: Close 42dB 42dB 51dB 53dB
Noise: 1 metre 40dB 40dB 42dB 42dB
Noise: 3 metres 40dB 40dB 41dB 41dB
Tested in a level, 23 degrees Celsius environment, the PlayStation 4 proved to be absolutely fine, with perfectly acceptable noise when playing just 1m away from the console and a very quiet experience indeed with the console 3m away. Our only concern is how things may stack up for those living in hot countries where the ambient temperature will be a lot higher, or how the hardware will perform in the summer months. Certainly, the notion of a game running simultaneously with the UI causing a surge in power consumption is very strange indeed and hopefully something that can be addressed with a firmware update.