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i5-4670 not turbo boosting?

Built a small PC recently, using the board from an HP Prodesk 400 G1 MT desktop. I put in an i5-4670, and it's working nicely apart from one thing: turbo boost doesn't work. Using multiple benchmarks, i.e. Cinebench/Prime95, I see that I get up to 3.4ghz at most (even on single core) and it just sits there, even when I should get to 3.6 all core and 3.8 single core. Voltage is at constant 1V, temperature maxes at 45C, but it still stays at 3.4ghz. I tried installing newer chipset drivers, new BIOS, checking BIOS options (there is a turbo boost BIOS option, I tried with it enabled and disabled) and resetting CMOS. XTU says Turbo is enabled, and Turbo state 1 is at 84w while state 2 is at 105w. Making these higher doesn't fix anything. I noticed in XTU while I was benchmarking that it stuck at 50w max TDP instead of going to the actual 84w max.

Anybody experience this on an HP board? Is it more likely to be a board issue, or a CPU issue? Any possible fix?

Thanks in advance.

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Probably behavior controlled by the proprietary motherboard, but tbh you probably aren't missing out on a meaningful amount of performance.

BabyBlu (Primary Rig): 

  • CPU: Intel Core i9 9900K @ Per Core 5.2Ghz, 5.2Ghz, 5.2Ghz, 5.2Ghz, 5.1Ghz, 5.1Ghz, 5.0Ghz, 5.0Ghz; Cache @ 4.8Ghz; 0 AVX offset
  • Motherboard: Asus Maximus XI Hero
  • RAM: G.Skill Trident Z RGB 4x8GB DDR4-3200 CL14 @ 4000Mhz 16-18-18-36
  • GPU: MSI RTX 2080 Sea Hawk EK X
  • Case: Phanteks Evolv X
  • Storage: XPG SX8200 Pro 2TB NVME, 3x ADATA Ultimate SU800 1TB (RAID 0), Samsung 970 EVO Plus 500GB NVME
  • PSU: Corsair HX1000i
  • Monitor: Dell S2417DG 23.8" 2560x1440 165 Hz Gsync
  • Cooling: Custom water loop (CPU & GPU), Radiators: 1x140mm(Back), 1x280mm(Top), 1x420mm(Front)
  • Keyboard: Corsair Strafe RGB (Cherry MX Brown)
  • Mouse: Corsair Scimitar Elite/MasterMouse MM710
  • Headset: Corsair Void Pro RGB
  • OS: Windows 10 Pro

Roxanne (Wife Build):

  • CPU: Intel Core i7 4790K @ Per Core 5.0Ghz - 5.0Ghz - 4.9Ghz - 4.8Ghz, Cache @ 4.6Ghz, De-lidded
  • Motherboard: Asus Z97A
  • RAM: G.Skill Ripjaws X 4x4GB DDR3-2133 CL9 @ 2200Mhz 9-11-10-22
  • GPU: EVGA GTX 1080 FTW2 Gaming ICX
  • Case: Corsair Vengeance C70, With Custom Side-Panel Window
  • Storage: Samsung 850 EVO 250GB, Samsung 860 EVO 1TB, Silicon Power A80 1TB NVME
  • PSU: Corsair AX760
  • Monitor: Samsung C27JG56 27" 2560x1440 144Hz Curved Freesync
  • Cooling: Corsair H115i RGB
  • Keyboard: Rosewill RK 9000V2(Cherry MX Blue)
  • Mouse: Glorious Model O-
  • Headset: SteelSeries Arctis 7
  • OS: Windows 10 Pro

BlackBox (HTPC):

  • Intel Pentium G4600 (Kaby Lake)
  • Asus H110T/CSM Thin Mini-ITX
  • G.Skill 1x8GB DDR4-2400 SO-DIMM CL16
  • iGPU
  • Akasa Euler Fanless Solid Aluminum THIN Mini ITX Case (passively cooled)
  • Samsung 850 EVO 250GB
  • External 120W Power Adaptor
  • 4K TV
  • Passively cooled by the Akasa case. No moving parts!
  • Handheld QWERTY keyboard and trackpad.
  • Windows 10 Pro, Kodi autostarts on boot

NAS:

  • Synology DS216J
  • 2x8TB WD Red NAS HDDs in RAID 1. 8TB usable space
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1 minute ago, HairlessMonkeyBoy said:

Probably behavior controlled by the proprietary motherboard, but tbh you probably aren't missing out on a meaningful amount of performance.

Kinda weird though, seeing as there's a turbo option in the BIOS. I think 400 mhz is a pretty large chunk of performance left on the table (or 200 mhz multi).

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What CPU was in the machine originally?

BabyBlu (Primary Rig): 

  • CPU: Intel Core i9 9900K @ Per Core 5.2Ghz, 5.2Ghz, 5.2Ghz, 5.2Ghz, 5.1Ghz, 5.1Ghz, 5.0Ghz, 5.0Ghz; Cache @ 4.8Ghz; 0 AVX offset
  • Motherboard: Asus Maximus XI Hero
  • RAM: G.Skill Trident Z RGB 4x8GB DDR4-3200 CL14 @ 4000Mhz 16-18-18-36
  • GPU: MSI RTX 2080 Sea Hawk EK X
  • Case: Phanteks Evolv X
  • Storage: XPG SX8200 Pro 2TB NVME, 3x ADATA Ultimate SU800 1TB (RAID 0), Samsung 970 EVO Plus 500GB NVME
  • PSU: Corsair HX1000i
  • Monitor: Dell S2417DG 23.8" 2560x1440 165 Hz Gsync
  • Cooling: Custom water loop (CPU & GPU), Radiators: 1x140mm(Back), 1x280mm(Top), 1x420mm(Front)
  • Keyboard: Corsair Strafe RGB (Cherry MX Brown)
  • Mouse: Corsair Scimitar Elite/MasterMouse MM710
  • Headset: Corsair Void Pro RGB
  • OS: Windows 10 Pro

Roxanne (Wife Build):

  • CPU: Intel Core i7 4790K @ Per Core 5.0Ghz - 5.0Ghz - 4.9Ghz - 4.8Ghz, Cache @ 4.6Ghz, De-lidded
  • Motherboard: Asus Z97A
  • RAM: G.Skill Ripjaws X 4x4GB DDR3-2133 CL9 @ 2200Mhz 9-11-10-22
  • GPU: EVGA GTX 1080 FTW2 Gaming ICX
  • Case: Corsair Vengeance C70, With Custom Side-Panel Window
  • Storage: Samsung 850 EVO 250GB, Samsung 860 EVO 1TB, Silicon Power A80 1TB NVME
  • PSU: Corsair AX760
  • Monitor: Samsung C27JG56 27" 2560x1440 144Hz Curved Freesync
  • Cooling: Corsair H115i RGB
  • Keyboard: Rosewill RK 9000V2(Cherry MX Blue)
  • Mouse: Glorious Model O-
  • Headset: SteelSeries Arctis 7
  • OS: Windows 10 Pro

BlackBox (HTPC):

  • Intel Pentium G4600 (Kaby Lake)
  • Asus H110T/CSM Thin Mini-ITX
  • G.Skill 1x8GB DDR4-2400 SO-DIMM CL16
  • iGPU
  • Akasa Euler Fanless Solid Aluminum THIN Mini ITX Case (passively cooled)
  • Samsung 850 EVO 250GB
  • External 120W Power Adaptor
  • 4K TV
  • Passively cooled by the Akasa case. No moving parts!
  • Handheld QWERTY keyboard and trackpad.
  • Windows 10 Pro, Kodi autostarts on boot

NAS:

  • Synology DS216J
  • 2x8TB WD Red NAS HDDs in RAID 1. 8TB usable space
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No idea. I bought the board off eBay because it was one of the cheapest H81 boards with a 24 pin ATX. Normal H81 boards (ASUS, MSI, etc) are $40-$50 and that's just stupid because it approaches A520 pricing. But the CPU compatibility sheet from HP includes i5's and i7's and documents the turbo features.

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I ask to determine the quality of the VRM. If it is as you say, "one of the cheapest H81 boards", then the VRM may not be capable of supplying more than 50W.

BabyBlu (Primary Rig): 

  • CPU: Intel Core i9 9900K @ Per Core 5.2Ghz, 5.2Ghz, 5.2Ghz, 5.2Ghz, 5.1Ghz, 5.1Ghz, 5.0Ghz, 5.0Ghz; Cache @ 4.8Ghz; 0 AVX offset
  • Motherboard: Asus Maximus XI Hero
  • RAM: G.Skill Trident Z RGB 4x8GB DDR4-3200 CL14 @ 4000Mhz 16-18-18-36
  • GPU: MSI RTX 2080 Sea Hawk EK X
  • Case: Phanteks Evolv X
  • Storage: XPG SX8200 Pro 2TB NVME, 3x ADATA Ultimate SU800 1TB (RAID 0), Samsung 970 EVO Plus 500GB NVME
  • PSU: Corsair HX1000i
  • Monitor: Dell S2417DG 23.8" 2560x1440 165 Hz Gsync
  • Cooling: Custom water loop (CPU & GPU), Radiators: 1x140mm(Back), 1x280mm(Top), 1x420mm(Front)
  • Keyboard: Corsair Strafe RGB (Cherry MX Brown)
  • Mouse: Corsair Scimitar Elite/MasterMouse MM710
  • Headset: Corsair Void Pro RGB
  • OS: Windows 10 Pro

Roxanne (Wife Build):

  • CPU: Intel Core i7 4790K @ Per Core 5.0Ghz - 5.0Ghz - 4.9Ghz - 4.8Ghz, Cache @ 4.6Ghz, De-lidded
  • Motherboard: Asus Z97A
  • RAM: G.Skill Ripjaws X 4x4GB DDR3-2133 CL9 @ 2200Mhz 9-11-10-22
  • GPU: EVGA GTX 1080 FTW2 Gaming ICX
  • Case: Corsair Vengeance C70, With Custom Side-Panel Window
  • Storage: Samsung 850 EVO 250GB, Samsung 860 EVO 1TB, Silicon Power A80 1TB NVME
  • PSU: Corsair AX760
  • Monitor: Samsung C27JG56 27" 2560x1440 144Hz Curved Freesync
  • Cooling: Corsair H115i RGB
  • Keyboard: Rosewill RK 9000V2(Cherry MX Blue)
  • Mouse: Glorious Model O-
  • Headset: SteelSeries Arctis 7
  • OS: Windows 10 Pro

BlackBox (HTPC):

  • Intel Pentium G4600 (Kaby Lake)
  • Asus H110T/CSM Thin Mini-ITX
  • G.Skill 1x8GB DDR4-2400 SO-DIMM CL16
  • iGPU
  • Akasa Euler Fanless Solid Aluminum THIN Mini ITX Case (passively cooled)
  • Samsung 850 EVO 250GB
  • External 120W Power Adaptor
  • 4K TV
  • Passively cooled by the Akasa case. No moving parts!
  • Handheld QWERTY keyboard and trackpad.
  • Windows 10 Pro, Kodi autostarts on boot

NAS:

  • Synology DS216J
  • 2x8TB WD Red NAS HDDs in RAID 1. 8TB usable space
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Wonder how this would cope with i7's then... guess that's what I get for cheaping out? Still weird...

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It sounds like your BIOS is not setting your CPU up correctly. If your CPU can only hit 3.4 GHz then you are right, turbo boost must be disabled. There are multiple ways to disable turbo boost. Intel XTU only allows you to access one method. Try using ThrottleStop instead.

 

Post some ThrottleStop screenshots. The main window, the FIVR window and the TPL window. Also post a screenshot of the Limit Reasons window when your CPU is loaded. It might show a reason for throttling turbo boost in there. If you post lots of info, hopefully we can find a way to use this program to adjust your CPU's settings.

 

On locked CPUs, the C states need to be enabled so the CPU can use the highest multipliers. If there is an option in the BIOS, make sure the C states are enabled.

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Now this is very odd. I had a feeling Windows was being dumb, so I made a live Linux USB and used the 7zip benchmark on it while monitoring scaling_cur_freq. And lo and behold, I was getting 3.8 on single and 3.6 on multi. So this is actually a Windows problem... I'll try reinstalling it to see if it gets fixed.

Edit: Throttlestop is able to set the turbo properly to 3.6 allcore.

Edit 2: Goes back to 3.4 when benching. Throttlestop says EDP limit, so yeah this motherboard's VRMs suck monkey.

1 hour ago, unclewebb said:

It sounds like your BIOS is not setting your CPU up correctly. If your CPU can only hit 3.4 GHz then you are right, turbo boost must be disabled. There are multiple ways to disable turbo boost. Intel XTU only allows you to access one method. Try using ThrottleStop instead.

 

Post some ThrottleStop screenshots. The main window, the FIVR window and the TPL window. Also post a screenshot of the Limit Reasons window when your CPU is loaded. It might show a reason for throttling turbo boost in there. If you post lots of info, hopefully we can find a way to use this program to adjust your CPU's settings.

 

On locked CPUs, the C states need to be enabled so the CPU can use the highest multipliers. If there is an option in the BIOS, make sure the C states are enabled.

 

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3 hours ago, brian105 said:

ThrottleStop says EDP limit

Did you try increasing this limit? Post some ThrottleStop screenshots including one that shows Limit Reasons when your CPU is throttling.

 

EDP Limit might just mean that this was set too low. If there were VRM issues, this would light up red in Limit Reasons.

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2 hours ago, unclewebb said:

Did you try increasing this limit? Post some ThrottleStop screenshots including one that shows Limit Reasons when your CPU is throttling.

 

EDP Limit might just mean that this was set too low. If there were VRM issues, this would light up red in Limit Reasons.

They did light up red in limit reasons. Not sure how I would increase the limit though.

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19 minutes ago, brian105 said:

Not sure how I would increase the limit though.

That is why I keep asking your to post some screenshots. If something is not set correctly, I will probably be able to recognize what it is.

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14 hours ago, unclewebb said:

That is why I keep asking your to post some screenshots. If something is not set correctly, I will probably be able to recognize what it is.

Here:

image.thumb.png.43d3604cda098a795be9d7a372167577.pngimage.png.96ddd5d00c3cf211e627ee96d22dd062.png

image.png.13069609619ae3e85997995f9ecca1f2.png

image.png.fc703ea3ac9c353173d22a89507bbe83.png

 

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Your power and current limits appear to be locked by the BIOS. 

 

Some 4th Gen Haswell CPUs support a feature called PowerCut. This tricks the CPU into reporting less power consumption so it can continue to run at its full rated speed without any power or current limit throttling holding it back.

 

To try this trick, when your computer is idle, open the FIVR window and set a fixed value for the VCCIN voltage. My 4th Gen laptop is stable when the VCCIN input voltage is set to 1.7998V. Press Apply. Next check the PowerCut box and press Apply again. After you do this, run a stress test and see if it makes any difference.

 

cSWSNAb.png

 

Your screenshot shows Locked beside the PowerCut feature so I am not sure if this is going to work for you. With the other limits locked by the BIOS, there is nothing else you can try.

 

For the turbo ratios, the default values are 38, 38, 37, 36 from top to bottom. Your BIOS might not be setting these correctly.

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Is it possible that the PSU is too weak? It's an older 300W unit with a 20 pin ATX connector rather than 24. 

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4 minutes ago, brian105 said:

Is it possible that the PSU is too weak?

EDP Current throttling usually occurs when the BIOS sets one of the current limits too low within the CPU. It usually has nothing to do with your power supply.

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Update: Probably a Windows issue. I installed macOS, and used the full core load option in Intel Power Gadget:713805677_ScreenShot2020-12-07at12_14_52PM.png.6f2e7e7bf0e4f9d588fa7eb96166eccb.png
These results are the same as what I experienced in Linux. 

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6 hours ago, brian105 said:

Update

Prime95 in Windows is putting a significantly bigger load on your CPU compared to the load that Intel Power Gadget is showing. 44W vs 32W. No comparison. At lower power levels you are not going to trigger EDP throttling like you are seeing in Windows while running Prime95.

 

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