F5F Stay Refreshed Hardware Desktop Thermal throttling on the CPU happens when it reduces performance to prevent overheating.

Thermal throttling on the CPU happens when it reduces performance to prevent overheating.

Thermal throttling on the CPU happens when it reduces performance to prevent overheating.

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Blu3forest
Member
85
12-22-2025, 08:48 AM
#11
I don't even use voltages that high on 1366. 2.0v is absurd. Here is 1.7v 6.1ghz FX-8350 cpu-z from X number of years ago. https://valid.x86.fr/accq5v I'd love to see your 2.0v with minimal accomplishment. 4.6ghz, probably doesn't need more than 1.35v 45nm on either Intel or AMD dating as far back as 1366/AM2+
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Blu3forest
12-22-2025, 08:48 AM #11

I don't even use voltages that high on 1366. 2.0v is absurd. Here is 1.7v 6.1ghz FX-8350 cpu-z from X number of years ago. https://valid.x86.fr/accq5v I'd love to see your 2.0v with minimal accomplishment. 4.6ghz, probably doesn't need more than 1.35v 45nm on either Intel or AMD dating as far back as 1366/AM2+

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Kiwitjeeexx
Member
52
12-22-2025, 10:25 AM
#12
Uncertain about what options are available at 2v since a 5.01ghz e5800 needs 1.8v and 2v PLN just to boot in BIOS. Very cautious about PLN levels because my P4 631 got damaged after applying 2.4v PLN for a 5.656ghz BIOS. Most reviews indicate that 5ghz on 45nm cores typically needs around 1.7-1.8v with standard cooling, whether liquid or air.
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Kiwitjeeexx
12-22-2025, 10:25 AM #12

Uncertain about what options are available at 2v since a 5.01ghz e5800 needs 1.8v and 2v PLN just to boot in BIOS. Very cautious about PLN levels because my P4 631 got damaged after applying 2.4v PLN for a 5.656ghz BIOS. Most reviews indicate that 5ghz on 45nm cores typically needs around 1.7-1.8v with standard cooling, whether liquid or air.

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mtapple_
Member
59
12-22-2025, 10:53 AM
#13
The CPU part number is finally identified. Performance at 1.7 to 2.0v falls between 6 to 8ghz, which is quite low compared to the E5800. At 5ghz in air with the E5800, the numbers are concerning at 1.8v. It seems we haven't seen many E series chips running at 5ghz daily as a top speed, which you've verified with a 4.6ghz clock. For the original poster, if they can maintain cooling up to 1.45v and keep the CPU under 70°C, they could potentially reach 4.6 to 4.8ghz daily.
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mtapple_
12-22-2025, 10:53 AM #13

The CPU part number is finally identified. Performance at 1.7 to 2.0v falls between 6 to 8ghz, which is quite low compared to the E5800. At 5ghz in air with the E5800, the numbers are concerning at 1.8v. It seems we haven't seen many E series chips running at 5ghz daily as a top speed, which you've verified with a 4.6ghz clock. For the original poster, if they can maintain cooling up to 1.45v and keep the CPU under 70°C, they could potentially reach 4.6 to 4.8ghz daily.

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StarKillerSTF
Member
125
12-22-2025, 11:54 AM
#14
Op needs top speeds because FX didn’t compare well to what Intel had then. Even worse, my cooler is a cheap Chinese tower and only handles my E5400 at 4.5ghz without overheating. I usually run it around 1.55v or lower, staying safe before performance drops. For 3.8ghz it needs 1.25v, 4ghz 1.32v, 4.2v 1.4v, and 4.5v 1.52v. If the board is old, I just stick to what’s fast enough and run it as a daily clock. Maybe once I upgrade to something like the SE 224 or SE 207, I can push higher speeds. What cooler are you using? Otherwise, don’t settle for a weak one—it limits everything.
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StarKillerSTF
12-22-2025, 11:54 AM #14

Op needs top speeds because FX didn’t compare well to what Intel had then. Even worse, my cooler is a cheap Chinese tower and only handles my E5400 at 4.5ghz without overheating. I usually run it around 1.55v or lower, staying safe before performance drops. For 3.8ghz it needs 1.25v, 4ghz 1.32v, 4.2v 1.4v, and 4.5v 1.52v. If the board is old, I just stick to what’s fast enough and run it as a daily clock. Maybe once I upgrade to something like the SE 224 or SE 207, I can push higher speeds. What cooler are you using? Otherwise, don’t settle for a weak one—it limits everything.

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