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Help with FX-9590 undervolting

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Processor Lidless PGA 2700X
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Benchmark Scores Max Cpu clock 7685Mhz FX-8300 WPrime 32m 2.886 seconds AMD 2700x
Ohh an FX thread!!! Heck ya!!!
Rule of thumb for ALL FX processors.

Higher temps = use more voltage = leaking more.
Lower temps = use less voltage = leaking less.

That is the only challenge you're having is temps. Lower = better in all cases.

These processors are not voltage limited. You give cooling lots of attention and will be the largest benefit.

Do what it takes, buying top TIM, lapping IHS plate, additional cooling on the water loop (chiller) and sky is the lmits.
 

sjball6988

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It has taken a few years worth of reading, testing settings, and getting over my ego to find the ideal speed and stability of my rig. But one of the biggest things I have figured out along the way is that, regardless of tested stability of any memory speeds, you should NEVER set your memory above the specified Memory Bandwidth of the CPU unless you want some bottlenecking from your Memory Controller. And all of AMD FX-series CPUs have a Memory Bandwidth of 29.9GB/s, so...

29.9GB/s = 30,617.6MB/s
30,617.6 / 32 = 956.8MHz (DDR)

What this means is that the Max Memory Speed on all AMD FX-series CPUs is DDR3-1913.6, which is why they have a specified Native Memory Speed of 1866MHz. So, even if you have DDR3-2400 or higher memory, and it's supported by your motherboard, always remember to consider the actual bandwidth of the Memory Controller on the CPU--or the Motherboard for older systems. After figuring this out and tweaking my rig, I finally have MUCH smoother performance all-around. Here's my specs and setup...

MY RIG:
ASUS Crosshair V Formula-Z (AMD 990FX; SB950)
AMD FX-9590 Black Edition (Vishera; 8-Core; 220W) @ 4720MHz
AMD Radeon R9 Gamer Series 16GB (2x8GB) PC3-19200/DDR3-2400 @ 1800 [8-10-10-24 1T]
EVGA Geforce GTX 1080 Ti SC2 11GB GDDR5X
Creative Sound Blaster X-FI Titanium Fata1ity Professional 64MB X-RAM
(2) Seagate IronWolf Pro 2TB (128MB Cache; 7200RPM; SATA 6.0Gb/s)

Frequencies:
CPU Bus Frequency: 224MHz (~224.75MHz in OS)
CPU Multiplier: 21x (4720MHz)
CPU/NB Multiplier: 12x (2697MHz)
HTT Multiplier: 12x (2697MHz)
Memory Multiplier: 8x (1798MHz)

Voltages:
CPU Voltage: 1.425v
CPU/NB Voltage: 1.325v
DRAM Voltage: 1.665v
NB HT Voltage: 1.25v

Power:
CPU Load Line Calibration: ULTRA HIGH
CPU Current Capability: DISABLED
CPU Power Phase Control: EXTREME
CPU Power Switching Frequency: MANUAL
VRM Fixed Frequency Mode: 550KHz
CPU Power Duty Control: EXTREME
CPU Power Response Control: ULTRA FAST
CPU Power Thermal Control: 151
CPU/NB Load Line Calibration: REGULAR
CPU/NB Current Capability: 130%
CPU/NB Power Response Control: ULTRA FAST
DRAM Current Capability: 130%
DRAM Power Phase Control: EXTREME
DRAM Power Switching Frequency: 500KHz

I did a little further testing since my previous post and found an even sweeter spot with faster response and smoother gameplay...

MY RIG:
ASUS Crosshair V Formula-Z (AMD 990FX; SB950)
AMD FX-9590 Black Edition (Vishera; 8-Core; 220W) @ 4792MHz
AMD Radeon R9 Gamer Series 16GB (2x8GB) PC3-19200/DDR3-2400 @ 1864 [9-10-10-24 1T]
EVGA Geforce GTX 1080 Ti SC2 11GB GDDR5X
Creative Sound Blaster X-FI Titanium Fata1ity Professional 64MB X-RAM
(2) Seagate IronWolf Pro 2TB (128MB Cache; 7200RPM; SATA 6.0Gb/s)

Frequencies:
CPU Bus Frequency: 199MHz (~199.66MHz in OS)
CPU Multiplier: 24x (4792MHz)
CPU/NB Multiplier: 11x (2196MHz)
HTT Multiplier: 13x (2596MHz)
Memory Multiplier: 9.33x (1864MHz)

Voltages:
CPU Voltage: 1.43125v (1.428-1.456v)
CPU/NB Voltage: 1.20v (1.204-1.25v)
DRAM Voltage: 1.655v (1.647-1.654v)
NB HT Voltage: 1.20v (1.217v)

Power:
CPU Load Line Calibration: ULTRA HIGH
CPU Current Capability: DISABLED
CPU Power Phase Control: EXTREME
CPU Power Switching Frequency: MANUAL
VRM Fixed Frequency Mode: 550KHz
CPU Power Duty Control: EXTREME
CPU Power Response Control: ULTRA FAST
CPU Power Thermal Control: 151
CPU/NB Load Line Calibration: REGULAR
CPU/NB Current Capability: 130%
CPU/NB Power Response Control: ULTRA FAST
DRAM Current Capability: 130%
DRAM Power Phase Control: EXTREME
DRAM Power Switching Frequency: 500KHz
 

eidairaman1

The Exiled Airman
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Messages
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System Name PCGOD
Processor AMD FX 8350@ 5.0GHz
Motherboard Asus TUF 990FX Sabertooth R2 2901 Bios
Cooling Scythe Ashura, 2×BitFenix 230mm Spectre Pro LED (Blue,Green), 2x BitFenix 140mm Spectre Pro LED
Memory 16 GB Gskill Ripjaws X 2133 (2400 OC, 10-10-12-20-20, 1T, 1.65V)
Video Card(s) AMD Radeon 290 Sapphire Vapor-X
Storage Samsung 840 Pro 256GB, WD Velociraptor 1TB
Display(s) NEC Multisync LCD 1700V (Display Port Adapter)
Case AeroCool Xpredator Evil Blue Edition
Audio Device(s) Creative Labs Sound Blaster ZxR
Power Supply Seasonic 1250 XM2 Series (XP3)
Mouse Roccat Kone XTD
Keyboard Roccat Ryos MK Pro
Software Windows 7 Pro 64
I did a little further testing since my previous post and found an even sweeter spot with faster response and smoother gameplay...

MY RIG:
ASUS Crosshair V Formula-Z (AMD 990FX; SB950)
AMD FX-9590 Black Edition (Vishera; 8-Core; 220W) @ 4792MHz
AMD Radeon R9 Gamer Series 16GB (2x8GB) PC3-19200/DDR3-2400 @ 1864 [9-10-10-24 1T]
EVGA Geforce GTX 1080 Ti SC2 11GB GDDR5X
Creative Sound Blaster X-FI Titanium Fata1ity Professional 64MB X-RAM
(2) Seagate IronWolf Pro 2TB (128MB Cache; 7200RPM; SATA 6.0Gb/s)

Frequencies:
CPU Bus Frequency: 199MHz (~199.66MHz in OS)
CPU Multiplier: 24x (4792MHz)
CPU/NB Multiplier: 11x (2196MHz)
HTT Multiplier: 13x (2596MHz)
Memory Multiplier: 9.33x (1864MHz)

Voltages:
CPU Voltage: 1.43125v (1.428-1.456v)
CPU/NB Voltage: 1.20v (1.204-1.25v)
DRAM Voltage: 1.655v (1.647-1.654v)
NB HT Voltage: 1.20v (1.217v)

Power:
CPU Load Line Calibration: ULTRA HIGH
CPU Current Capability: DISABLED
CPU Power Phase Control: EXTREME
CPU Power Switching Frequency: MANUAL
VRM Fixed Frequency Mode: 550KHz
CPU Power Duty Control: EXTREME
CPU Power Response Control: ULTRA FAST
CPU Power Thermal Control: 151
CPU/NB Load Line Calibration: REGULAR
CPU/NB Current Capability: 130%
CPU/NB Power Response Control: ULTRA FAST
DRAM Current Capability: 130%
DRAM Power Phase Control: EXTREME
DRAM Power Switching Frequency: 500KHz
My 8350 is 5.0 across all cores 1.467Vcore,
 

sjball6988

New Member
Joined
Dec 8, 2019
Messages
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My 8350 is 5.0 across all cores 1.467Vcore,
Nice. What cooling do you use?
My biggest problems are that I'm just using a closed-loop Corsair H105 240mm AIO Liquid Cooling Kit with a couple Delta 120mm FFB1212EH [150CFM] fans that are rigged to be controlled by my motherboard, and that these FX-9590s are unpredictable and notorious for drawing lots of power, thus causing a lot of extra heat, which makes it very difficult to find stable speeds, voltages, and power settings. Hell, it's hard enough to just find a motherboard that will support its power draw of 220W, much less finding stability. I WOULD buy an 8350 to replace it, but then I wouldn't want this $230--price when purchased--CPU to go to waste while I spend another $100 for an 8350; I'd rather just keep saving all that money up to put toward buying a MUCH better Ryzen 7 or Core i7...lol.
 

eidairaman1

The Exiled Airman
Joined
Jul 2, 2007
Messages
30,443 (6.45/day)
Location
Republic of Texas (True Patriot)
System Name PCGOD
Processor AMD FX 8350@ 5.0GHz
Motherboard Asus TUF 990FX Sabertooth R2 2901 Bios
Cooling Scythe Ashura, 2×BitFenix 230mm Spectre Pro LED (Blue,Green), 2x BitFenix 140mm Spectre Pro LED
Memory 16 GB Gskill Ripjaws X 2133 (2400 OC, 10-10-12-20-20, 1T, 1.65V)
Video Card(s) AMD Radeon 290 Sapphire Vapor-X
Storage Samsung 840 Pro 256GB, WD Velociraptor 1TB
Display(s) NEC Multisync LCD 1700V (Display Port Adapter)
Case AeroCool Xpredator Evil Blue Edition
Audio Device(s) Creative Labs Sound Blaster ZxR
Power Supply Seasonic 1250 XM2 Series (XP3)
Mouse Roccat Kone XTD
Keyboard Roccat Ryos MK Pro
Software Windows 7 Pro 64
Nice. What cooling do you use?
My biggest problems are that I'm just using a closed-loop Corsair H105 240mm AIO Liquid Cooling Kit with a couple Delta 120mm FFB1212EH [150CFM] fans that are rigged to be controlled by my motherboard, and that these FX-9590s are unpredictable and notorious for drawing lots of power, thus causing a lot of extra heat, which makes it very difficult to find stable speeds, voltages, and power settings. Hell, it's hard enough to just find a motherboard that will support its power draw of 220W, much less finding stability. I WOULD buy an 8350 to replace it, but then I wouldn't want this $230--price when purchased--CPU to go to waste while I spend another $100 for an 8350; I'd rather just keep saving all that money up to put toward buying a MUCH better Ryzen 7 or Core i7...lol.
I am fortunate to have the chip i do, 5.1 is unstable, could be a limit on board cooling or not enough volts beyond 1.524 or another setting.

This is multiplier clocked only.
Scythe Ashura, yes the 9370 and 9590 are ultra leaky chips, look at Shrimp Brime's message.
 
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Motherboard X470 Tachi Ultimate
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Memory C.R.S.
Video Card(s) Radeon VII
Software Win 7
Benchmark Scores Never high enough
Nice. What cooling do you use?
My biggest problems are that I'm just using a closed-loop Corsair H105 240mm AIO Liquid Cooling Kit with a couple Delta 120mm FFB1212EH [150CFM] fans that are rigged to be controlled by my motherboard, and that these FX-9590s are unpredictable and notorious for drawing lots of power, thus causing a lot of extra heat, which makes it very difficult to find stable speeds, voltages, and power settings. Hell, it's hard enough to just find a motherboard that will support its power draw of 220W, much less finding stability. I WOULD buy an 8350 to replace it, but then I wouldn't want this $230--price when purchased--CPU to go to waste while I spend another $100 for an 8350; I'd rather just keep saving all that money up to put toward buying a MUCH better Ryzen 7 or Core i7...lol.
It's good to see the OP continuing to experiment and find ways to get the most from their chip.

I've always used the top Asus boards for mine, the Sabertooth 2.0 and 3.0 along with the Crosshair V and Crosshair V-Z. Those are proven to handle the full wattage draw of a 9xxx series board if anything can reliably.
I see you've been running one as well, personally there isn't anything else I'd run with my 9xxx chips and that's the truth of it.
 

eidairaman1

The Exiled Airman
Joined
Jul 2, 2007
Messages
30,443 (6.45/day)
Location
Republic of Texas (True Patriot)
System Name PCGOD
Processor AMD FX 8350@ 5.0GHz
Motherboard Asus TUF 990FX Sabertooth R2 2901 Bios
Cooling Scythe Ashura, 2×BitFenix 230mm Spectre Pro LED (Blue,Green), 2x BitFenix 140mm Spectre Pro LED
Memory 16 GB Gskill Ripjaws X 2133 (2400 OC, 10-10-12-20-20, 1T, 1.65V)
Video Card(s) AMD Radeon 290 Sapphire Vapor-X
Storage Samsung 840 Pro 256GB, WD Velociraptor 1TB
Display(s) NEC Multisync LCD 1700V (Display Port Adapter)
Case AeroCool Xpredator Evil Blue Edition
Audio Device(s) Creative Labs Sound Blaster ZxR
Power Supply Seasonic 1250 XM2 Series (XP3)
Mouse Roccat Kone XTD
Keyboard Roccat Ryos MK Pro
Software Windows 7 Pro 64
It's good to see the OP continuing to experiment and find ways to get the most from their chip.

I've always used the top Asus boards for mine, the Sabertooth 2.0 and 3.0 along with the Crosshair V and Crosshair V-Z. Those are proven to handle the full wattage draw of a 9xxx series board if anything can reliably.
I see you've been running one as well, personally there isn't anything else I'd run with my 9xxx chips and that's the truth of it.
I still want a R1.0 board to experiment and learn how to do custom bios to try and get core unlocker in 2.0/3.0 boards
 
Joined
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Messages
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Motherboard X470 Tachi Ultimate
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Memory C.R.S.
Video Card(s) Radeon VII
Software Win 7
Benchmark Scores Never high enough
I don't believe it can be done - If not mistaken here there is a special chip/component on the board that allows for unlocking, switched on in the BIOS via the ACC function.
Could be wrong but that's what I've heard about it before.
 
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