• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

AMD Zen 4 "Raphael" Processors Feature Improved Thermal Sensors and Power Management

AleksandarK

News Editor
Staff member
Joined
Aug 19, 2017
Messages
2,651 (0.99/day)
AMD is slowly preparing the launch of the latest and greatest Ryzen processor family based on the Zen 4 CPU core design. Among various things that are getting an overhaul, the Raphael processor generation is now getting revamped temperature reading and better power management circuitry. According to an Igor's Lab report, AMD has prepared a few new improvements that will make temperature reading and power management easier for PC enthusiasts. Currently, the reported CPU temperature is called Tcontrol (Tctl), which is what the cooling solution sees. If Tctl is high, the fans spin up and cool the system. If Tctl is low, the fans slow down to reduce noise.

With Raphael, the CUR_TEMP (current temperature) output part of Tctl has been upgraded to reflect a much smoother curve, and avoid jittering with fans as they are not spiking so suddenly anymore. This is helping contribute to the noise output and has made it run at a consistent fan speed in the system. Another note about Raphael is a new power management technique. AMD has designed the AM5 platform to avoid sudden power spikes, to maintain maximum efficiency over time. It is a design decision made from the very start, and the CPU will try to constrain itself in the TDP range that it is configured for. For more details about the circuitry, please head over to the Igor's Lab article.



View at TechPowerUp Main Site
 

TheLostSwede

News Editor
Joined
Nov 11, 2004
Messages
17,771 (2.42/day)
Location
Sweden
System Name Overlord Mk MLI
Processor AMD Ryzen 7 7800X3D
Motherboard Gigabyte X670E Aorus Master
Cooling Noctua NH-D15 SE with offsets
Memory 32GB Team T-Create Expert DDR5 6000 MHz @ CL30-34-34-68
Video Card(s) Gainward GeForce RTX 4080 Phantom GS
Storage 1TB Solidigm P44 Pro, 2 TB Corsair MP600 Pro, 2TB Kingston KC3000
Display(s) Acer XV272K LVbmiipruzx 4K@160Hz
Case Fractal Design Torrent Compact
Audio Device(s) Corsair Virtuoso SE
Power Supply be quiet! Pure Power 12 M 850 W
Mouse Logitech G502 Lightspeed
Keyboard Corsair K70 Max
Software Windows 10 Pro
Benchmark Scores https://valid.x86.fr/yfsd9w
Joined
Feb 3, 2017
Messages
3,822 (1.33/day)
Processor Ryzen 7800X3D
Motherboard ROG STRIX B650E-F GAMING WIFI
Memory 2x16GB G.Skill Flare X5 DDR5-6000 CL36 (F5-6000J3636F16GX2-FX5)
Video Card(s) INNO3D GeForce RTX™ 4070 Ti SUPER TWIN X2
Storage 2TB Samsung 980 PRO, 4TB WD Black SN850X
Display(s) 42" LG C2 OLED, 27" ASUS PG279Q
Case Thermaltake Core P5
Power Supply Fractal Design Ion+ Platinum 760W
Mouse Corsair Dark Core RGB Pro SE
Keyboard Corsair K100 RGB
VR HMD HTC Vive Cosmos
AMD has designed the AM5 platform to avoid sudden power spikes, to maintain maximum efficiency over time. It is a design decision made from the very start, and the CPU will try to constrain itself in the TDP range that it is configured for.
I do not quite see where you get the power spike avoidance. There are VRM and PSU efficiency considerations and checks but nothing really about power spikes. With the way and speed at which these CPUs can vary their frequency, avoiding power spikes is quite difficult.
When it comes to constraining itself - as Igor's story describes, the behaviour is same as Ryzen 3000/5000 where effective power limit is PPT at 1.35x TDP.
 

TheLostSwede

News Editor
Joined
Nov 11, 2004
Messages
17,771 (2.42/day)
Location
Sweden
System Name Overlord Mk MLI
Processor AMD Ryzen 7 7800X3D
Motherboard Gigabyte X670E Aorus Master
Cooling Noctua NH-D15 SE with offsets
Memory 32GB Team T-Create Expert DDR5 6000 MHz @ CL30-34-34-68
Video Card(s) Gainward GeForce RTX 4080 Phantom GS
Storage 1TB Solidigm P44 Pro, 2 TB Corsair MP600 Pro, 2TB Kingston KC3000
Display(s) Acer XV272K LVbmiipruzx 4K@160Hz
Case Fractal Design Torrent Compact
Audio Device(s) Corsair Virtuoso SE
Power Supply be quiet! Pure Power 12 M 850 W
Mouse Logitech G502 Lightspeed
Keyboard Corsair K70 Max
Software Windows 10 Pro
Benchmark Scores https://valid.x86.fr/yfsd9w
Well, we're going from 105W TDP to 170W TDP. That's a 60% increase. PPT for a 170W TDP is 230W. That's a big jump from Zen 3.
And we know this will apply to like for like SKUs? Afaik, only the a range of TDP numbers have leaked, not the associated SKUs, so it means nothing so far.
 
Joined
Apr 30, 2011
Messages
2,716 (0.54/day)
Location
Greece
Processor AMD Ryzen 5 5600@80W
Motherboard MSI B550 Tomahawk
Cooling ZALMAN CNPS9X OPTIMA
Memory 2*8GB PATRIOT PVS416G400C9K@3733MT_C16
Video Card(s) Sapphire Radeon RX 6750 XT Pulse 12GB
Storage Sandisk SSD 128GB, Kingston A2000 NVMe 1TB, Samsung F1 1TB, WD Black 10TB
Display(s) AOC 27G2U/BK IPS 144Hz
Case SHARKOON M25-W 7.1 BLACK
Audio Device(s) Realtek 7.1 onboard
Power Supply Seasonic Core GC 500W
Mouse Sharkoon SHARK Force Black
Keyboard Trust GXT280
Software Win 7 Ultimate 64bit/Win 10 pro 64bit/Manjaro Linux
Well, we're going from 105W TDP to 170W TDP. That's a 60% increase. PPT for a 170W TDP is 230W. That's a big jump from Zen 3.
Most possibly the 170W isn't TDP but reap power draw. If so, it isn't such a big increase since the Ryzen 9 CPUs consume ~145W. So, maybe the TDP from 105W will rise to 140W.
 
Joined
Feb 11, 2009
Messages
5,572 (0.96/day)
System Name Cyberline
Processor Intel Core i7 2600k -> 12600k
Motherboard Asus P8P67 LE Rev 3.0 -> Gigabyte Z690 Auros Elite DDR4
Cooling Tuniq Tower 120 -> Custom Watercoolingloop
Memory Corsair (4x2) 8gb 1600mhz -> Crucial (8x2) 16gb 3600mhz
Video Card(s) AMD RX480 -> RX7800XT
Storage Samsung 750 Evo 250gb SSD + WD 1tb x 2 + WD 2tb -> 2tb MVMe SSD
Display(s) Philips 32inch LPF5605H (television) -> Dell S3220DGF
Case antec 600 -> Thermaltake Tenor HTCP case
Audio Device(s) Focusrite 2i4 (USB)
Power Supply Seasonic 620watt 80+ Platinum
Mouse Elecom EX-G
Keyboard Rapoo V700
Software Windows 10 Pro 64bit

TheLostSwede

News Editor
Joined
Nov 11, 2004
Messages
17,771 (2.42/day)
Location
Sweden
System Name Overlord Mk MLI
Processor AMD Ryzen 7 7800X3D
Motherboard Gigabyte X670E Aorus Master
Cooling Noctua NH-D15 SE with offsets
Memory 32GB Team T-Create Expert DDR5 6000 MHz @ CL30-34-34-68
Video Card(s) Gainward GeForce RTX 4080 Phantom GS
Storage 1TB Solidigm P44 Pro, 2 TB Corsair MP600 Pro, 2TB Kingston KC3000
Display(s) Acer XV272K LVbmiipruzx 4K@160Hz
Case Fractal Design Torrent Compact
Audio Device(s) Corsair Virtuoso SE
Power Supply be quiet! Pure Power 12 M 850 W
Mouse Logitech G502 Lightspeed
Keyboard Corsair K70 Max
Software Windows 10 Pro
Benchmark Scores https://valid.x86.fr/yfsd9w
Leaks

Leaks are saying 170 pl1 now imagine pl2
Again, which SKU/SKUs?
We have leaked spec documents, but it doesn't mean there will be a consumer SKU that uses said specs.
We have ZERO proof of any product so far and we're a year or so away from AM5 product launches, so at this point it's just speculation.
 
Joined
Jul 3, 2018
Messages
31 (0.01/day)
Location
Belarus
After the last articles by igorslab (thermal pads, evga, capacitor), everyone should have a healthy skepticism)
 

eidairaman1

The Exiled Airman
Joined
Jul 2, 2007
Messages
42,609 (6.67/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
Joined
Mar 16, 2017
Messages
2,160 (0.76/day)
Location
Tanagra
System Name Budget Box
Processor Xeon E5-2667v2
Motherboard ASUS P9X79 Pro
Cooling Some cheap tower cooler, I dunno
Memory 32GB 1866-DDR3 ECC
Video Card(s) XFX RX 5600XT
Storage WD NVME 1GB
Display(s) ASUS Pro Art 27"
Case Antec P7 Neo
I would not be surprised to see AMD leverage higher power usage, since that seems to be the direction we’re going. Intel set the table, and AMD would be foolish to not at least engineer some of their new SKUs to take advantage of that same concept. They are likely preparing for Adler Lake and beyond, and I’d be surprised if we see Intel retreat from their Rocket Lake principles of power management. There’s nothing saying AMD has to use Intel-levels of power, but you know they will if they can AND need to in order to gain a performance lead. As long as they continue to offer performant products at 35W, 65W, and 105W, that is what matters for OEMs, but there’s nothing stopping them from also offering something like a 170W enthusiast product. With Adler Lake, the core wars are really on, so I wouldn’t be surprised to see 24C/48T or 32C/64T consumer-grade Ryzens. With something like that, AMD is going to have to get really creative to have both high core counts and also the highest clock parts.

More to the point of the OP, it’s about time AMD came up with a better way to handle CPU fan speeds. That’s always been a bit of annoyance with Ryzen, IMO. You shouldn’t need to adjust the default fan curve out of the box in order to stop the fan from ramping up and down like it does.
 
Joined
Feb 18, 2012
Messages
2,715 (0.58/day)
System Name MSI GP76
Processor intel i7 11800h
Cooling 2 laptop fans
Memory 32gb of 3000mhz DDR4
Video Card(s) Nvidia 3070
Storage x2 PNY 8tb cs2130 m.2 SSD--16tb of space
Display(s) 17.3" IPS 1920x1080 240Hz
Power Supply 280w laptop power supply
Mouse Logitech m705
Keyboard laptop keyboard
Software lots of movies and Windows 10 with win 7 shell
Benchmark Scores Good enough for me

eidairaman1

The Exiled Airman
Joined
Jul 2, 2007
Messages
42,609 (6.67/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
Nvidia level's are even worse, but granted that's GPU's still something like a R9 290 use to be deemed a power hog and Nvidia seems content with just pushing TDP higher and higher.

Funny how the R9s are still relevant today...
 

TheLostSwede

News Editor
Joined
Nov 11, 2004
Messages
17,771 (2.42/day)
Location
Sweden
System Name Overlord Mk MLI
Processor AMD Ryzen 7 7800X3D
Motherboard Gigabyte X670E Aorus Master
Cooling Noctua NH-D15 SE with offsets
Memory 32GB Team T-Create Expert DDR5 6000 MHz @ CL30-34-34-68
Video Card(s) Gainward GeForce RTX 4080 Phantom GS
Storage 1TB Solidigm P44 Pro, 2 TB Corsair MP600 Pro, 2TB Kingston KC3000
Display(s) Acer XV272K LVbmiipruzx 4K@160Hz
Case Fractal Design Torrent Compact
Audio Device(s) Corsair Virtuoso SE
Power Supply be quiet! Pure Power 12 M 850 W
Mouse Logitech G502 Lightspeed
Keyboard Corsair K70 Max
Software Windows 10 Pro
Benchmark Scores https://valid.x86.fr/yfsd9w
Actually, thinking about it, maybe, just maybe, the 170W TDP will be for the CPUs with integrated GPU, since that's also rumoured to be a thing.
 
Joined
Oct 6, 2020
Messages
35 (0.02/day)
Well, we're going from 105W TDP to 170W TDP. That's a 60% increase. PPT for a 170W TDP is 230W. That's a big jump from Zen 3.
AMD hasn't confirmed any TDPs of Zen 4 yet. All that's floating around are rumors and unproved assumptions. We only know the TDP classes of the AM5 socket. Which go up to 170W, especially designed for liquid cooling solutions. A new segment that doesn't exist on AM4. The "normal" TDP classes end at 120W on AM5. Which isn't a big jump from current 95W. And likely also specified with higher core counts and integrated GPUs in mind. Don't forget, core counts could be increased by at least 50% with smaller nodes. But 120W is only ~25% more than 95W. Which tells us power consumption and efficiency of Zen 4 should be very good. Or what do you expect? Almost twice the power consumption at 10% more performance, to be much worse than Zen 3 efficiency wise? Get a reality check! Zen 4 is a significantly improved architecture, 5nm will add significantly improved transistor efficiency and density. Zen 4 looks like a beast on all fronts. I would be more concerned about Alder Lake. Power numbers look alarming. Again.
 
Joined
Apr 30, 2011
Messages
2,716 (0.54/day)
Location
Greece
Processor AMD Ryzen 5 5600@80W
Motherboard MSI B550 Tomahawk
Cooling ZALMAN CNPS9X OPTIMA
Memory 2*8GB PATRIOT PVS416G400C9K@3733MT_C16
Video Card(s) Sapphire Radeon RX 6750 XT Pulse 12GB
Storage Sandisk SSD 128GB, Kingston A2000 NVMe 1TB, Samsung F1 1TB, WD Black 10TB
Display(s) AOC 27G2U/BK IPS 144Hz
Case SHARKOON M25-W 7.1 BLACK
Audio Device(s) Realtek 7.1 onboard
Power Supply Seasonic Core GC 500W
Mouse Sharkoon SHARK Force Black
Keyboard Trust GXT280
Software Win 7 Ultimate 64bit/Win 10 pro 64bit/Manjaro Linux

@gruffi AM4 TDP CPUs go up to 105W

 
Top