AMD CPU temps

[Simon771]

I have been wondering about AMD CPU temps ... for FX 8350 max safe temps in only 61°C, while Intel CPU's are around 80°C mark if I'm not mistaken.

But why can't AMD chips take more heat?

 

Also, does anyone know if new Ryzen will have same 61°C limitation? I hope Ryzen will be soldered to IHS, so temperatures shouldn't be a problem, but who knows if it will be soldered or they will just use TIM.

[Biggerboot]

13 minutes ago, Simon771 said:

I have been wondering about AMD CPU temps ... for FX 8350 max safe temps in only 61°C, while Intel CPU's are around 80°C mark if I'm not mistaken.

But why can't AMD chips take more heat?

 

Also, does anyone know if new Ryzen will have same 61°C limitation? I hope Ryzen will be soldered to IHS, so temperatures shouldn't be a problem, but who knows if it will be soldered or they will just use TIM.

The max temp that FX can safely achieve is 70c while the max temp on the core is 62c (which may be the number you're referencing).  

 

Somebody with a better understanding of CPU architecture may be able to give you an exact reasoning to that limitation, but to my knowledge, the max temperature listed on the maker's site (Intel/AMD) is the determination of the point where the CPU begins to degrade.  They're usually set to clock down (throttle) when hitting their thermal limit.  For AMD FX in particular they have a higher TDP, so they generate more heat than their intel counterpart.  Ryzen will probably be a different story.

 

[Simon771]

6 minutes ago, Biggerboot said:

The max temp that FX can safely achieve is 70c while the max temp on the core is 62c (which may be the number you're referencing).  

 

Somebody with a better understanding of CPU architecture may be able to give you an exact reasoning to that limitation, but to my knowledge, the max temperature listed on the maker's site (Intel/AMD) is the determination of the point where the CPU begins to degrade.  They're usually set to clock down (throttle) when hitting their thermal limit.  For AMD FX in particular they have a higher TDP, so they generate more heat than their intel counterpart.  Ryzen will probably be a different story.

 

I do understand that if CPU reaches that temperature it will try to throttle down by decreasing frequency and voltage. If it can't do that, it will just turn off itself to prevent any damage.

But I don't get it why Intel can handle 90 or even 100°C before it starts throttling, and AMD can't.

 

I do hope Ryzen will have more headroom, so OC won't be limited by temperatures

[Biggerboot]

5 minutes ago, Simon771 said:

But I don't get it why Intel can handle 90 or even 100°C before it starts throttling, and AMD can't.

Beats me.  My guess would be the core count (maybe with more cores in the same space the temp needs to be lower), but the FX architecture is kind of an enigma to me.  People still debate whether its cores are really 'cores' at all.

[Organized]

AMD Overdrive (overclocking utitlity for AMD, but only use it for monitoring) shows the thermal margin and when you add this up to your core temperature, you end up at 70°C on the core.

 

Actually the bigger problem is the socket max temp. of 70°C (standard for AM3+), but my rig (8350 @ 4.8GHz) reaches 74°C with prime95 and the socket didn't melt down, so thats probably fine