AMD Ryzen and heat
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65 °C is very good if the CPU is running with all CCXs under full load. In recent years, for me and for friends and family, I have always assembled machines with Ryzen (from the 1000 version up to the latest 5000). I didn't experience any stability issues, except when the RAM was used out of specification. Sometimes 100 KHz too much on the RAM is enough to make a system unstable: then you have to play with the overclocking parameters to bring the system back to stability, but in my opinion, it is almost never worth it. But, always always always, before buying the pieces, check their compatibility and glean in the forums looking for any problems with certain combinations. Obviously, opinions on the web must always be taken "cum grano salis". For Ryzen CPU / APU with 65W of TDP usually, the supplied heatsink is sufficient. For versions with 105W of TDP, if the CPUs are always under stress, it is better to adopt more performing heatsinks. However, at around 95 degrees (or slightly less) the CCXs slow down themselves.
Your messages are getting flagged so I'm replying here because I can't stand the wait! =) I can still read them via email though. It's a Pro 4750G not a 4750 sorry. Not a laptop. Something of a monster desktop chip. Here are excerpts from my CPU-Z report (sorry for the length)
Socket 1 ID = 0
Number of cores 8 (max 8)
Number of threads 16 (max 16)
Manufacturer AuthenticAMD
Name AMD Ryzen 7 PRO 4750G
Codename Renoir
Specification AMD Ryzen 7 PRO 4750G with Radeon Graphics
Package Socket AM4 (1331)
CPUID F.0.1
Extended CPUID 17.60
Core Stepping RN-A1
Technology 7 nm
TDP Limit 65.0 Watts
Tjmax 95.0 °C
Core Speed 3539.6 MHz
Multiplier x Bus Speed 35.75 x 99.0 MHz
Base frequency (cores) 99.0 MHz
Base frequency (ext.) 99.0 MHz
Instructions sets MMX (+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A, x86-64, AES, AVX, AVX2, FMA3, SHA
Microcode Revision 0x8600106
L1 Data cache 8 x 32 KB (8-way, 64-byte line)
L1 Instruction cache 8 x 32 KB (8-way, 64-byte line)
L2 cache 8 x 512 KB (8-way, 64-byte line)
L3 cache 2 x 4 MB (16-way, 64-byte line)
Max CPUID level 0000000Dh
Max CPUID ext. level 8000001Eh
FID/VID Control yes
# of P-States 3Memory SPD
DIMM # 1
SMBus address 0x50
Memory type DDR4
Module format UDIMM
Module Manufacturer(ID) TEAMGROUP Inc. (7F7F7F7FEF000000000000000000)
SDRAM Manufacturer (ID) SpecTek Incorporated (7F7FB50000000000000000000000)
Size 16384 MBytes
Max bandwidth DDR4-2401 (1200 MHz)
Part number TEAMGROUP-UD4-3200
Serial number 0202D900
Manufacturing date Week 47/Year 20
Nominal Voltage 1.20 Volts
EPP no
XMP yes, rev. 2.0
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 10.0-10-10-25-35 @ 750 MHz
JEDEC #2 11.0-11-11-27-38 @ 825 MHz
JEDEC #3 12.0-12-12-29-41 @ 900 MHz
JEDEC #4 13.0-13-13-32-45 @ 975 MHz
JEDEC #5 14.0-15-15-34-48 @ 1051 MHz
JEDEC #6 15.0-16-16-37-52 @ 1126 MHz
JEDEC #7 16.0-16-16-39-55 @ 1200 MHz
JEDEC #8 17.0-16-16-39-55 @ 1200 MHz
JEDEC #9 18.0-16-16-39-55 @ 1200 MHz
XMP profile XMP-3200
Specification DDR4-3200
VDD Voltage 1.350 Volts
Min Cycle time 0.625 ns (1600 MHz)
Max CL 16.0
Min tRP 12.50 ns
Min tRCD 12.50 ns
Min tRAS 25.00 ns
Min tRC 37.50 ns
Min tRRD 3.75 ns
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 15.0-19-19-38-57-n.a @ 1500 MHz (1 -
I have an (I think related) issue that *is* a problem. My CPU is significantly underperforming in benchmarks compared to other Ryzen 7 4750s. It's not anything obvious like cheap RAM, or windows throttling. It's like the board refuses to push the chip to anything near capacity. It's not about the clockspeed - it clocks full under load. The EDC goes to 100% as well. My board can change its performance profile I think but when I tried one of them I got a reboot under load too quickly for me to figure out for sure what happened.
Real programmers use butterflies
Being a Ryzen 7 4750 I guess the scenario is that of a laptop. In that case, having never owned one with a Ryzen, I can't give you any suggestions. However, 65 ° C on the die is a more than the acceptable temperature for a fully loaded Ryzen 7. You have to see if it is a problem with your unit, or if other models of the same series are running all at that speed. In the first case, of course, your hardware has problems. Otherwise, in the latter case, it's a badly born laptop model built with components that are not harmonized with each other. Speaking of desktop PCs instead, I noticed that chipsets make a difference. For example, the X570 with a Ryzen 5000 has no problem pushing RAM to the max with the most extreme configurations while remaining stable all the time. Other chipsets, X470 and B550, on the other hand, are more sensitive to the type of RAM installed and in some cases, I had to lower the RAM clock a little. Personally, I prefer to mount MSI brand motherboards, the PRO or MAX series, but I also found the GigaBytes stable. However, lately, my experience is limited to AM4 Moterbords as I never mounted an Intel machine again after the first Ryzen 1000 has appeared.
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Being a Ryzen 7 4750 I guess the scenario is that of a laptop. In that case, having never owned one with a Ryzen, I can't give you any suggestions. However, 65 ° C on the die is a more than the acceptable temperature for a fully loaded Ryzen 7. You have to see if it is a problem with your unit, or if other models of the same series are running all at that speed. In the first case, of course, your hardware has problems. Otherwise, in the latter case, it's a badly born laptop model built with components that are not harmonized with each other. Speaking of desktop PCs instead, I noticed that chipsets make a difference. For example, the X570 with a Ryzen 5000 has no problem pushing RAM to the max with the most extreme configurations while remaining stable all the time. Other chipsets, X470 and B550, on the other hand, are more sensitive to the type of RAM installed and in some cases, I had to lower the RAM clock a little. Personally, I prefer to mount MSI brand motherboards, the PRO or MAX series, but I also found the GigaBytes stable. However, lately, my experience is limited to AM4 Moterbords as I never mounted an Intel machine again after the first Ryzen 1000 has appeared.
The profile is set to standard stuff. It was already selected in the bios when I bought the thing. I haven't changed anything there other than the one time I set CM5 Aggressive? or something and it caused a reboot as soon as it went under load, so I changed it back. I have all stock cooling and the CPU itself is OC resistant anyway so I haven't really fiddled with overclocking anything.
Real programmers use butterflies
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Your messages are getting flagged so I'm replying here because I can't stand the wait! =) I can still read them via email though. It's a Pro 4750G not a 4750 sorry. Not a laptop. Something of a monster desktop chip. Here are excerpts from my CPU-Z report (sorry for the length)
Socket 1 ID = 0
Number of cores 8 (max 8)
Number of threads 16 (max 16)
Manufacturer AuthenticAMD
Name AMD Ryzen 7 PRO 4750G
Codename Renoir
Specification AMD Ryzen 7 PRO 4750G with Radeon Graphics
Package Socket AM4 (1331)
CPUID F.0.1
Extended CPUID 17.60
Core Stepping RN-A1
Technology 7 nm
TDP Limit 65.0 Watts
Tjmax 95.0 °C
Core Speed 3539.6 MHz
Multiplier x Bus Speed 35.75 x 99.0 MHz
Base frequency (cores) 99.0 MHz
Base frequency (ext.) 99.0 MHz
Instructions sets MMX (+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A, x86-64, AES, AVX, AVX2, FMA3, SHA
Microcode Revision 0x8600106
L1 Data cache 8 x 32 KB (8-way, 64-byte line)
L1 Instruction cache 8 x 32 KB (8-way, 64-byte line)
L2 cache 8 x 512 KB (8-way, 64-byte line)
L3 cache 2 x 4 MB (16-way, 64-byte line)
Max CPUID level 0000000Dh
Max CPUID ext. level 8000001Eh
FID/VID Control yes
# of P-States 3Memory SPD
DIMM # 1
SMBus address 0x50
Memory type DDR4
Module format UDIMM
Module Manufacturer(ID) TEAMGROUP Inc. (7F7F7F7FEF000000000000000000)
SDRAM Manufacturer (ID) SpecTek Incorporated (7F7FB50000000000000000000000)
Size 16384 MBytes
Max bandwidth DDR4-2401 (1200 MHz)
Part number TEAMGROUP-UD4-3200
Serial number 0202D900
Manufacturing date Week 47/Year 20
Nominal Voltage 1.20 Volts
EPP no
XMP yes, rev. 2.0
AMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 10.0-10-10-25-35 @ 750 MHz
JEDEC #2 11.0-11-11-27-38 @ 825 MHz
JEDEC #3 12.0-12-12-29-41 @ 900 MHz
JEDEC #4 13.0-13-13-32-45 @ 975 MHz
JEDEC #5 14.0-15-15-34-48 @ 1051 MHz
JEDEC #6 15.0-16-16-37-52 @ 1126 MHz
JEDEC #7 16.0-16-16-39-55 @ 1200 MHz
JEDEC #8 17.0-16-16-39-55 @ 1200 MHz
JEDEC #9 18.0-16-16-39-55 @ 1200 MHz
XMP profile XMP-3200
Specification DDR4-3200
VDD Voltage 1.350 Volts
Min Cycle time 0.625 ns (1600 MHz)
Max CL 16.0
Min tRP 12.50 ns
Min tRCD 12.50 ns
Min tRAS 25.00 ns
Min tRC 37.50 ns
Min tRRD 3.75 ns
XMP timings table CL-tRCD-tRP-tRAS-tRC-CR @ frequency (voltage)
XMP #1 15.0-19-19-38-57-n.a @ 1500 MHz (1 -
It would be, except I have a problem which might be related. My CPU is performing very poorly on userbenchmark compared to other people's Ryzen 7 4750Gs on the CPU benchmark. It's not anything obvious like slow RAM or throttling by Windows power settings. So it almost makes me wonder if my BIOS is undervolting my chip or something?
Real programmers use butterflies
Checked the bios version? It can be a bit of a pita the way e.g. asus has organised the bios updates, but I do think it is worth it. Esp. when you upgrade your cpu on the same MB, which is often an option with AMD.
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Checked the bios version? It can be a bit of a pita the way e.g. asus has organised the bios updates, but I do think it is worth it. Esp. when you upgrade your cpu on the same MB, which is often an option with AMD.
One of the first things I did after I noticed the issue was update the BIOS. It made no difference.
Real programmers use butterflies
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How many of you run a modern(ish) Ryzen? They seem to run a little hot. 65C while stress testing, but I read somewhere these chips are good for up to 90 degrees or so. I know nothing about AMD. Am I totally off base here thinking my chip is actually running pretty cool for this series of chips?
Real programmers use butterflies
Ryzen is spec'd to 95C. However standard practice for silicon is 65C if you want it to last. The lifetime vs heat is not a linear curve, you can kill a chip very quickly as you approach 125C.
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Ryzen is spec'd to 95C. However standard practice for silicon is 65C if you want it to last. The lifetime vs heat is not a linear curve, you can kill a chip very quickly as you approach 125C.
I think it probably should run a little hotter under heavy load. My CPU isn't giving me performance numbers I expect of a Ryzen 4750G. The numbers aren't awful - they're within the ballpark(ish), but it's kind of like one of the cylinders isn't firing sometimes. So when I look at the cooling numbers (running cooler than normal) and combine that with the performance numbers (running slower than normal) it leads me to believe my chip is being underutilized by my mobo and/or bios.
Real programmers use butterflies
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How many of you run a modern(ish) Ryzen? They seem to run a little hot. 65C while stress testing, but I read somewhere these chips are good for up to 90 degrees or so. I know nothing about AMD. Am I totally off base here thinking my chip is actually running pretty cool for this series of chips?
Real programmers use butterflies
If you're running Windows 11, there a a lot of driver issues that the chip manufacturers are working through yet. Also remember that you might be comparing your cpu to people that have tweaked theirs to maximize its performance, including not running the TPM module which has been shown to lower performance quite a bit.
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I think it probably should run a little hotter under heavy load. My CPU isn't giving me performance numbers I expect of a Ryzen 4750G. The numbers aren't awful - they're within the ballpark(ish), but it's kind of like one of the cylinders isn't firing sometimes. So when I look at the cooling numbers (running cooler than normal) and combine that with the performance numbers (running slower than normal) it leads me to believe my chip is being underutilized by my mobo and/or bios.
Real programmers use butterflies
Looking at this page on Tom's Hardware for your CPU [AMD Ryzen 7 4750G Boost, Thermals, Overclocking, Power Consumption](https://www.tomshardware.com/reviews/amd-ryzen-7-pro-4750g-renoir-review/2) it appears that 65C max is the norm.
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How many of you run a modern(ish) Ryzen? They seem to run a little hot. 65C while stress testing, but I read somewhere these chips are good for up to 90 degrees or so. I know nothing about AMD. Am I totally off base here thinking my chip is actually running pretty cool for this series of chips?
Real programmers use butterflies
All modern desktop grade CPUs have been running at those temperatures for a long time now. Intel included. Big SIs like Dell or HP only use the bare minimum needed cooling so this is also something to keep in mind. 65 C is a fantastic temp under load. My R5 3600XT hits 75 C under Prime95 stress test with a CoolerMaster EVO-212 black edition on it. If you are dissatisfied with your heat levels, you would need to invest in either a very high end air cooler like something from Noctua, Scythe or BeQuiet; or you would need to go water cooling with an AIO. All of this assumes you can even fit the coolers into your system. I custom build all my PCs so I know I can put in whatever cooler I might need to go to in the future. As for voltages, the funny thing with Ryzen is that they actually do better with less voltage in many cases. I ran a full per CCX/core tune on my system and found that performance went up, some voltages were set lower and overall heat didn't change any that mattered.
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All modern desktop grade CPUs have been running at those temperatures for a long time now. Intel included. Big SIs like Dell or HP only use the bare minimum needed cooling so this is also something to keep in mind. 65 C is a fantastic temp under load. My R5 3600XT hits 75 C under Prime95 stress test with a CoolerMaster EVO-212 black edition on it. If you are dissatisfied with your heat levels, you would need to invest in either a very high end air cooler like something from Noctua, Scythe or BeQuiet; or you would need to go water cooling with an AIO. All of this assumes you can even fit the coolers into your system. I custom build all my PCs so I know I can put in whatever cooler I might need to go to in the future. As for voltages, the funny thing with Ryzen is that they actually do better with less voltage in many cases. I ran a full per CCX/core tune on my system and found that performance went up, some voltages were set lower and overall heat didn't change any that mattered.
I'd be thrilled with the temp if I wasn't also lagging in CPU performance compared to other setups with the same CPU. I suspect something with my mobo/bios configuration.
Real programmers use butterflies
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I'd be thrilled with the temp if I wasn't also lagging in CPU performance compared to other setups with the same CPU. I suspect something with my mobo/bios configuration.
Real programmers use butterflies
You could be held back by the RAM in your system. Ryzen 3000 series really fly with DDR3 3200 (or 3600) C16 dual rank. (Basically a good 32 GB kit from Corsair or GSkill). When I switched from a 16 GB kit that was single rank DIMMs to a 32 GB kit that is dual rank, several things began to perform a lot better. You could get this kit if you are only running a 16 GB low end kit now: G.SKILL Trident Z Neo (For AMD Ryzen) Series 32GB (2 x 16GB) 288-Pin RGB DDR4 SDRAM DDR4 3600 (PC4 28800) Desktop Memory Model F4-3600C16D-32GTZN - Newegg.ca[^]
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You could be held back by the RAM in your system. Ryzen 3000 series really fly with DDR3 3200 (or 3600) C16 dual rank. (Basically a good 32 GB kit from Corsair or GSkill). When I switched from a 16 GB kit that was single rank DIMMs to a 32 GB kit that is dual rank, several things began to perform a lot better. You could get this kit if you are only running a 16 GB low end kit now: G.SKILL Trident Z Neo (For AMD Ryzen) Series 32GB (2 x 16GB) 288-Pin RGB DDR4 SDRAM DDR4 3600 (PC4 28800) Desktop Memory Model F4-3600C16D-32GTZN - Newegg.ca[^]
I'm already running 2x16. Anyway, I've got a bigger issue now, and I'll probably need a whole new case and cooling system.
Real programmers use butterflies