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Questions regarding AMD APU Underclocking and undervolting

post #1 of 3
Thread Starter 
Hi guys,

So.. I'm considering upgrading my current media center/file server (see sig for Ninebreaker) towards an AMD build and I have a few questions since I want it to be as power friendly as possible, since the biggest load it'll have is basically decoding 1080p / 1080 Hi10p... (Even overclocked to 2GHz the poor Atom 330 can't keep up with Hi10p since it cannot be Hardware accelerated)

I lean immediately to AMD since I already have an A6-5400 (non K) that was given to me by a friend, now what's left is the mobo and RAM.

The mobo that I am considering to get is the Gigabyte GA-F2A88XN-WIFI since it seems to be the most feature rich in terms of voltage and frequency control (I hope) to what I want. I could get the MSI A75 but I've read that it lacks any kind of voltage controls, so it defeats the purpose... I know it would be about half the price, but in the long run it would make a difference since the computer is on 24/7.


I was wondering what kind of power consumptions I would get using this hardware. How well do these APUs undervolt/underclock? I know that coming from such a low powered system such as the Atom it'll be hard - if not impossible - to match but I would like it as close as it can be. Anyone has a similar system that can give me some info?


It has been roughly 8~10 years since I last used an AMD so... yeah I've been ignorant on their tech for quite a bit lol.


Thanks thumb.gif


cheers.gif
紅白 [Kōhaku]
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円相 [Ensō]
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紅白 [Kōhaku]
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円相 [Ensō]
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CPUMotherboardGraphicsGraphics
Core i5 3570k @ 4.5GHz - 1.29v Maximus V Formula / Thunder FX EVGA GTX 670 @1333/6500 (Unlocked BIOS) EVGA GTX 670 @1249/6500 (Unlocked BIOS) 
RAMHard DriveHard DriveCooling
Kingston HyperX Beast 2133MHz 2x4GB 2x Micron C400 (Crucial m4) 256GB RAID0 2x Seagate 250GB 2.5" 7200RPM RAID1 EK Supremacy Nickel + Plexi 
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2x EK FC GTX670 CSQ Phobya Xtreme 400 v2 Alphacool NexXxos XT45 240 Windows 8.1 Pro x64 
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Dell U2913WM 2560x1080 Logitech G15 v2 Orange Zalman ZM850HP (850w) Corsair Graphite 600T SE 
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Steelseries Sensei Steelpad 5L Logitech Z5400 @ Supreme FX IV Razer Tiamat 2.2 @ Supreme FX IV 
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AMD A6-5400B @ 3.6GHz Gigabyte F2A88XN-WIFI AMD 7540D 4GB DDR3 1333MHz 
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Western Digital Velociraptor 150GB RAID1 1TB Seagate Barracuda ES.2 Samsung DVD-RW DL Noctua NH-C12P 
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Windows 8.1 Pro x64 32" Sony Bravia LED KDL32-EX710 1920x1080 Logitech LX710 192W AC-DC adapter + 160W DC-DC Pico PSU 
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post #2 of 3
I have a dual core A4-3400, overclocked from 2.7 to 3.4ghz with stock voltage, an SSD, a 7200rpm WD Black (set to never turn off), 4 gig of 1600 2 x 4 RAM and a huge Zalman tower cooler and 3 120mm fans all running off the MSI mobo you listed. I ran a calculator on it and at idle it uses 105watts, under load it uses 135watts. I can't imagine you'll use much more power than that.
Jarvis
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Jarvis
(26 items)
 
Pepto Pony
(12 items)
 
MrDVR
(15 items)
 
CPUMotherboardGraphicsRAM
AMD FX-8350 @ 4.8Ghz CROSSHAIR V FORMULA-Z MSI GTX 980 Gaming 4g 16Gb G. Skill Ripjaws 4x4 @ 1600 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 PRO 128Gb SSD Intel 160 Gb SSD Intel 250 Gb SSD Generic DVD-RW 
CoolingCoolingCoolingCooling
2 x Noctua (NF-P12-1300 )1300rpm Premium Silent... Alphacool NexXxos UT60 Full Copper Radiator 240 Noctua NF-A6X25 FLX Quiet Computer Cooling Fan ... NZXT Sentry Mesh Fan Controller w/ Five 30 watt... 
CoolingCoolingCoolingCooling
2 x Corsair Air Series SP120   COUGAR CF-V12H Vortex Hydro-Dynamic-Bearing  Monsoon 90° Rotary Angle Fitting - 5/8" - Red Bitspower Dual / Single D5 Top Upgrade Kit 100 ... 
CoolingCoolingCoolingCooling
ModMyToys DreamFlex Premium 3/8" ID Tubing Reta... Coolance Liquid Coolant Bottle, 700mL Fluoresce... Coolance PMP 450 Variable Speed D5 Pump Bitspower D5 Mod Top V2 Pom version 
OSMonitorKeyboardPower
Microsoft Windows 7 Ultimate Samsung KS8000 4k UHD 65" Microsoft Wireless Comfort 5000 Keyboard and Mouse SeaSonic M12II 750 
CaseAudio
My TV Stand Cabinet Creative Sound Blaster X-Fi Titanium 
CPUMotherboardGraphicsRAM
FX-4300 Gigabyte GA-78LMT-USB3 EVGA Geforce GTX 260 G.Skill Ripjaws X 
Hard DriveHard DriveOptical DriveCooling
Corsair SSD Samsung 7200 Laptop drive Some DVD Burner I took out of a dead Dell. Noctua NH-C12P SE14 
MonitorKeyboardPowerCase
Dell 19" 16:9 Logitec wireless Enermax 650w Apevia X-Cruiser3 Pink 
CPUMotherboardGraphicsRAM
A6-6400K Dual Core MSI A78M-E35 Onboard 4Gb G.Skill Ripjaws 1600Mhz (2 x 2) 
Hard DriveHard DriveOptical DriveCooling
Intel 320 SSD Western Digital 2.5" 1Tb 7200rpm  LG External Blue-ray Combo Drive Noctual NH-L9a 92mm SS02 
OSMonitorKeyboardPower
Windows 7 Ultimate 64bit Toshiba Regza 52" 1080p Logitech K400 Antec EarthWatts Green EA-380D 
CaseAudioOther
A piece of plywood and some zip ties. Onboard Hauppauge WinTV HVR-2250 dual tuner card. 
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post #3 of 3
Thread Starter 
Wow really? That's a bit more than I expected... Though yours is overclocked, I read that underclocking and undervolting both CPU and GPU would yield about 15~25% power savings... But that was with a different system.


By my calculations my current HTPC should be consuming about 50W on idle and roughly 60~65W under load. The HDDs themselves are over 20W alone rolleyes.gif


Thanks for the input. +smile.gif
紅白 [Kōhaku]
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円相 [Ensō]
(16 items)
 
CPUMotherboardGraphicsGraphics
Core i5 3570k @ 4.5GHz - 1.29v Maximus V Formula / Thunder FX EVGA GTX 670 @1333/6500 (Unlocked BIOS) EVGA GTX 670 @1249/6500 (Unlocked BIOS) 
RAMHard DriveHard DriveCooling
Kingston HyperX Beast 2133MHz 2x4GB 2x Micron C400 (Crucial m4) 256GB RAID0 2x Seagate 250GB 2.5" 7200RPM RAID1 EK Supremacy Nickel + Plexi 
CoolingCoolingCoolingOS
2x EK FC GTX670 CSQ Phobya Xtreme 400 v2 Alphacool NexXxos XT45 240 Windows 8.1 Pro x64 
MonitorKeyboardPowerCase
Dell U2913WM 2560x1080 Logitech G15 v2 Orange Zalman ZM850HP (850w) Corsair Graphite 600T SE 
MouseMouse PadAudioAudio
Steelseries Sensei Steelpad 5L Logitech Z5400 @ Supreme FX IV Razer Tiamat 2.2 @ Supreme FX IV 
CPUMotherboardGraphicsRAM
AMD A6-5400B @ 3.6GHz Gigabyte F2A88XN-WIFI AMD 7540D 4GB DDR3 1333MHz 
Hard DriveHard DriveOptical DriveCooling
Western Digital Velociraptor 150GB RAID1 1TB Seagate Barracuda ES.2 Samsung DVD-RW DL Noctua NH-C12P 
OSMonitorKeyboardPower
Windows 8.1 Pro x64 32" Sony Bravia LED KDL32-EX710 1920x1080 Logitech LX710 192W AC-DC adapter + 160W DC-DC Pico PSU 
CaseMouseMouse PadAudio
Lian-Li PC-Q11B Logitech LX7 Laser Any surface (lolz) AMD HDMI audio 
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紅白 [Kōhaku]
(20 items)
 
円相 [Ensō]
(16 items)
 
CPUMotherboardGraphicsGraphics
Core i5 3570k @ 4.5GHz - 1.29v Maximus V Formula / Thunder FX EVGA GTX 670 @1333/6500 (Unlocked BIOS) EVGA GTX 670 @1249/6500 (Unlocked BIOS) 
RAMHard DriveHard DriveCooling
Kingston HyperX Beast 2133MHz 2x4GB 2x Micron C400 (Crucial m4) 256GB RAID0 2x Seagate 250GB 2.5" 7200RPM RAID1 EK Supremacy Nickel + Plexi 
CoolingCoolingCoolingOS
2x EK FC GTX670 CSQ Phobya Xtreme 400 v2 Alphacool NexXxos XT45 240 Windows 8.1 Pro x64 
MonitorKeyboardPowerCase
Dell U2913WM 2560x1080 Logitech G15 v2 Orange Zalman ZM850HP (850w) Corsair Graphite 600T SE 
MouseMouse PadAudioAudio
Steelseries Sensei Steelpad 5L Logitech Z5400 @ Supreme FX IV Razer Tiamat 2.2 @ Supreme FX IV 
CPUMotherboardGraphicsRAM
AMD A6-5400B @ 3.6GHz Gigabyte F2A88XN-WIFI AMD 7540D 4GB DDR3 1333MHz 
Hard DriveHard DriveOptical DriveCooling
Western Digital Velociraptor 150GB RAID1 1TB Seagate Barracuda ES.2 Samsung DVD-RW DL Noctua NH-C12P 
OSMonitorKeyboardPower
Windows 8.1 Pro x64 32" Sony Bravia LED KDL32-EX710 1920x1080 Logitech LX710 192W AC-DC adapter + 160W DC-DC Pico PSU 
CaseMouseMouse PadAudio
Lian-Li PC-Q11B Logitech LX7 Laser Any surface (lolz) AMD HDMI audio 
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