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M5a87 motherboard problem?

post #1 of 7
Thread Starter 
I recently posted a thread over in the AMD General section regarding my latest computer build. Here's a link: http://www.overclock.net/amd-general/1043867-1090t-amd-build.html

So anyway, as soon as I run Prime95, as soon as the temperature hits 48 degrees celsius, it cuts my multiplier from 16 to 8, and drops the voltage by a good tenth of a volt. Now, a lot of people in the other thread have said that it's because I have no heatsinks on my vrms, but I would think that an AM3+ motherboard designed to handle bulldozer chips would be able to handle a measly hexcore under load. Does anyone have any ideas what could possibly be causing this? Thanks in advance.

My setup is as follows:
Corsair 650tx Power Supply
ASUS M5A87 AM3+ motherboard
AMD 1090t Thuban Black Edition 3.2ghz 6-core processor
8GB G-Skill Ripjaw 1600mhz DDR3 memory (model# F3-12800CL9D-8GBRL)
Antec Kuhler H20 heatsink
Antec Nine Hundred Two V3
NVidia gtx 560ti Fermi
    
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Phenom II 1090t hexcore Crosshair V Formula GTX 560ti Fermi 8gb G.Skill Ripjaw DDR3-1600 
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Intel 320 series 80gb SSD Windows 7 64-bit Corsair Enthusiast Series 650tx Antec Nine Hundred Two V3 
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post #2 of 7
In the bios there might be some sort of throttling enabled. So check all the bios options (C1E and Cool N Quiet should be disabled, as well as other miscellaneous throttling features based on temperature and/or power draw). As far as your voltage dropping, some boards drop a little under load and some don't.
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post #3 of 7
I did answer your question in the other thread (happening due to the VRM temperatures exceeding limits). This is actually a standard feature on ASUS boards, due to the PWM controller design. It's been standard for awhile actually. Anyone care to chip in?

This hexacore is a 125W TDP and one of the most VRM-heavy and power-consuming of all AMD chips. The FX Series may actually reduce this power consumption because they run on more power efficient 32nm manufacturing process, and use the shared-resource architecture to save die space & power. The base VRM design of the board is 4+1 phase with no heatsink; this is fine if you are running a higher power consumption CPU at plain stock speed, and with the stock heatsink which blows over the VRM area for cooling, as long as the VRM design isn't known to often blow up. However, this is definitely prone to such overheating issue if you use an aftermarket cooler on top of a high power consumption CPU and additionally intend to overclock.

CnQ and C1E are forms of throttling but they should not be happening during load. If you turn them off, it might not make a difference and the throttling may still happen.
post #4 of 7
Hi, I would just like to say that "xd" is correct, on my old M4A88TD when running prime 95 with my X6, when it got to around 60 degrees the multipliers halved from 14 to 7, this however does not happen on my Crosshair.

I assume that the larger heatpipe based VRM cooler on the crosshair can maintain temps so the multipliers dont need to be reduced.
    
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post #5 of 7
Quote:
Originally Posted by Elis;13928608 
Hi, I would just like to say that "xd" is correct, on my old M4A88TD when running prime 95 with my X6, when it got to around 60 degrees the multipliers halved from 14 to 7, this however does not happen on my Crosshair.

I assume that the larger heatpipe based VRM cooler on the crosshair can maintain temps so the multipliers dont need to be reduced.

The VRM cooler coupled with the fact it has around 10 power phases too.
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Hard DriveCoolingOSPower
5 x 8TB Seagate IronWolf Pro in ZF2 Array CoolerMaster Hyper 212 Evo FreeNAS 11 EVGA SuperNOVA G2 550W Gold 
Case
Fractal Design Node 804 
CPUMotherboardGraphicsRAM
i7 4790k Asus Z97 Pro WIFI-AC Sapphire Nitro Radeon R9 Fury Tri-X OC+  G.Skill 4 x 8GB F3-2133C9D-16GXH 
Hard DriveOptical DriveCoolingOS
2 x Intel 730 480GB SSD in RAID 0 Asus DRW-24B1ST/BLK/B/AS Noctua NH-D15 Winblows 10 Pro x64 
MonitorKeyboardPowerCase
Pixio PX277 Logitech G510 Seasonic SS-660XP2 Fractal Design R4 Blackout 
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Logitech G500 Xtrac Ripper 
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CPUMotherboardGraphicsRAM
AMD Ryzen 7 1700X AsRock X370 Taichi Sapphire R9 Fury Tri-X OC F4-3200C14D-32GTZR 
Hard DriveOptical DriveCoolingOS
Plextor M8Se(G) 1TB People still use these? lol Cryorig H7 Winblows 10 Professional X64 
MonitorKeyboardPowerCase
Pixio PX277 Logitech G510 Seasonic SS-860XP2 Fractal Design Define C TG 
MouseMouse Pad
Logitech G500 Xtrac Ripper 
CPUMotherboardGraphicsRAM
Intel Xeon E3-1245 v5 SuperMicro X11SSM-F-O C236 Integrated 2 x 16GB Kingston ValueRAM ECC KVR21E15D8/16 
Hard DriveCoolingOSPower
5 x 8TB Seagate IronWolf Pro in ZF2 Array CoolerMaster Hyper 212 Evo FreeNAS 11 EVGA SuperNOVA G2 550W Gold 
Case
Fractal Design Node 804 
CPUMotherboardGraphicsRAM
i7 4790k Asus Z97 Pro WIFI-AC Sapphire Nitro Radeon R9 Fury Tri-X OC+  G.Skill 4 x 8GB F3-2133C9D-16GXH 
Hard DriveOptical DriveCoolingOS
2 x Intel 730 480GB SSD in RAID 0 Asus DRW-24B1ST/BLK/B/AS Noctua NH-D15 Winblows 10 Pro x64 
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Pixio PX277 Logitech G510 Seasonic SS-660XP2 Fractal Design R4 Blackout 
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post #6 of 7
Thread Starter 
Yeah xd is definitely correct. I changed to the stock cooler, ordered a Noctua NH-D14 and am selling the Antec Kuhler as soon as possible. Totally useless if your board doesn't have built in VRM cooling lol Thanks for all the replies! I might look into a Crosshair V down the line, because after reading up on vrm in xd's thread, I'm worried about the stress OCing could have on my board.

Also, the Crosshair's vrm heatsinks and general design are slick and sexy as hell smile.gif
    
CPUMotherboardGraphicsRAM
Phenom II 1090t hexcore Crosshair V Formula GTX 560ti Fermi 8gb G.Skill Ripjaw DDR3-1600 
Hard DriveOSPowerCase
Intel 320 series 80gb SSD Windows 7 64-bit Corsair Enthusiast Series 650tx Antec Nine Hundred Two V3 
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CPUMotherboardGraphicsRAM
Phenom II 1090t hexcore Crosshair V Formula GTX 560ti Fermi 8gb G.Skill Ripjaw DDR3-1600 
Hard DriveOSPowerCase
Intel 320 series 80gb SSD Windows 7 64-bit Corsair Enthusiast Series 650tx Antec Nine Hundred Two V3 
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post #7 of 7
Quote:
Originally Posted by Dopamin3;13928679 
The VRM cooler coupled with the fact it has around 10 power phases too.

The M4A88TD-V had 8+2 aswell as my Crosshair, the only visible difference is the larger heatpipe cooler.
    
CPUMotherboardGraphicsRAM
Intel 3570K ASUS Sabertooth Z77 KFA2 GTX 570 932/2000 @ 1.1v 8 GB Corsair 1600 MHz 
Hard DriveCoolingOSMonitor
64Gb Crucial M4 + 2 x Samsung F3 1TB Corsair H100 Windows 8 RP 2 x AOC e2343F 23" LED 1920x1080 
PowerCaseMouse
OCZ StealthXstream II 600W CM HAF 932 Saitek GM3200 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel 3570K ASUS Sabertooth Z77 KFA2 GTX 570 932/2000 @ 1.1v 8 GB Corsair 1600 MHz 
Hard DriveCoolingOSMonitor
64Gb Crucial M4 + 2 x Samsung F3 1TB Corsair H100 Windows 8 RP 2 x AOC e2343F 23" LED 1920x1080 
PowerCaseMouse
OCZ StealthXstream II 600W CM HAF 932 Saitek GM3200 
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