- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hyper Threading Enabled:
(Prime95 running 8 threads on Blend torture test, CPU-Z, ThrottleStop showing active Multiplier information, Intel Extreme Tweaking Utility showing 0% thermal throttling)
CPU Multipliers applied in various scenarios:
- Idle: 33/34x (I expect 25x)
- Prime95 1 core (2 threads) = 29/30x
- Prime 95 2 cores (4 threads) = 27x
- Prime 95 3 cores (6 threads) = 27x
- Prime 95 4 cores (8 threads) = 27x
Temperatures:
- Idle: Around 44C
- Full load: Around 75C
- These values are VERY typical for this processor's use case (mobile workstation)
Voltage: 0.96v
Hyper Threading Disabled:
(Prime95 running 4 threads on Blend torture test, CPU-Z, ThrottleStop showing active Multiplier information, Intel Extreme Tweaking Utility showing 0% thermal throttling)
CPU Multipliers applied in various scenarios:
- Idle: 33/34x (I expect 25x)
- Prime95 1 core = 31x
- Prime 95 2 cores = 30x
- Prime 95 3 cores = 28x
- Prime 95 4 cores = 25x
Temperatures:
- Idle: Around 55C
- Full load: Around 68C
- The higher idle temperature is probably because of the higher voltage - is this normal??
Voltage: 1.1v
Questions:
- What is causing this unexpected behaviour? (Intel XTU above indicates 0% thermal throttling)
- What is the throttling algorithm?
- What can I do to further diagnose the issue?
- Why does The Intel XTU Stress test cause the CPU to behave as I expect?
I have tried:
- Overriding multipliers in XTU - no effect
- Disabling SpeedStep - stops turbo behaviour completely, stuck at 25x multiplier
- Increasing maximum current draw in BIOS and XTU for various scenarios - no effect.
- Forcing fan to 100% even when idle - no effect
Link Copied
1 Reply
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
I have updated this post with information with HyperThreading disabled.
Reply
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page