Main AMD64 TCaseMax Release V1.19
- Thread starter sacha35
- Start date
The Tcase is the maximum temperature the CPU can run at before it has errors or fails, this does not mean the temperature that you are reading in your BIOS as the CPU does actually run a bit hotter than this, so higher the Tcase the higher overclock that can be obtained as this means you can add more volts of which increases the heat so higher the TCase generally means higher overclocks.
The TDP is the amount of Watts that this CPU will run at; Higher Watts generally give higher overclocks.
This is why an FX chip will always be able to clock higher because in general the TDP will be much higher than that of a normal AMD64 chip.
The TDP is the amount of Watts that this CPU will run at; Higher Watts generally give higher overclocks.
This is why an FX chip will always be able to clock higher because in general the TDP will be much higher than that of a normal AMD64 chip.
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nick25
Guest
Aren't all A64s designed to run hotter than the Tcase numbers shown here Sacha?
Yes they are desined to run if i am not mistaken upto 60c but should be keept under 50C. the Tcase of each CPU is set by AMD as to there testing, as this is the point of when the CPU starts to break down I.E fail AMD tests, take my Opteron 165, this is basicly a failed FX60, this is why it has had its multy lowerd to X9 and the tcase on mine of just 49c and a TDP of 35Watts, wheres mavericks has pasted all AMD tests with know problems and has a Tcase of 59C and a TDP of 85 Watts.
This does not mean that the Opteron 165 will not reach FX60 speeds but needs to be keept cooler to run at these speeds stable, if i was just to use a normal HSF then i could see problems in some apps that where CPU intensive.
What this all means is this: On 90nm manufacturing process, the power leakage of transistors on individual processors differs greatly, this is why AMD implemented TCaseMax. Each CPU has a different TDP rating, here's how it works:
A program reads the TCaseMax value off the CPU, then depending on the processor (CPU type like A64, Opteron;CPU Rating like 3500+, 146) it finds the processor's Thermal Profile (If you download the "AMD Opteron™ Processor Power and Thermal Data Sheet" and look at pages 10-11 you'll see the different thermal profiles). When the thermal profile is determined, the program finds the TDP rating that corresponds to the CPU's TCaseMax value.
So in a few words, the higher the TCaseMax, the higher the TDP of a processor will be (the transistor leakage is higher), so the processor will run hotter. Several people have reported that the Opterons rated at 71C TCaseMax were pretty hot. On the other side these processors will be able to reach higher clock speeds.
That is why we see that on average processors with higher TCaseMax can usually reach higher CPU speeds when overclocked.
Every CPU type (A64, FX, X2, Opteron, DC Opteron) has a different thermal profile, that is why you see that on an FX a TCaseMax rating can be "only" 57C and it'll overclock way better than an A64 with a 57C TCaseMax rating. That is because at 57C TCaseMax, an FX has a TDP of 77W while the A64 has a TDP of 44W.
I hope this helps
This does not mean that the Opteron 165 will not reach FX60 speeds but needs to be keept cooler to run at these speeds stable, if i was just to use a normal HSF then i could see problems in some apps that where CPU intensive.
What this all means is this: On 90nm manufacturing process, the power leakage of transistors on individual processors differs greatly, this is why AMD implemented TCaseMax. Each CPU has a different TDP rating, here's how it works:
A program reads the TCaseMax value off the CPU, then depending on the processor (CPU type like A64, Opteron;CPU Rating like 3500+, 146) it finds the processor's Thermal Profile (If you download the "AMD Opteron™ Processor Power and Thermal Data Sheet" and look at pages 10-11 you'll see the different thermal profiles). When the thermal profile is determined, the program finds the TDP rating that corresponds to the CPU's TCaseMax value.
So in a few words, the higher the TCaseMax, the higher the TDP of a processor will be (the transistor leakage is higher), so the processor will run hotter. Several people have reported that the Opterons rated at 71C TCaseMax were pretty hot. On the other side these processors will be able to reach higher clock speeds.
That is why we see that on average processors with higher TCaseMax can usually reach higher CPU speeds when overclocked.
Every CPU type (A64, FX, X2, Opteron, DC Opteron) has a different thermal profile, that is why you see that on an FX a TCaseMax rating can be "only" 57C and it'll overclock way better than an A64 with a 57C TCaseMax rating. That is because at 57C TCaseMax, an FX has a TDP of 77W while the A64 has a TDP of 44W.
I hope this helps
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nick25
Guest
Ok thanks Sacha 
Highland3r
New member
Wheres the dancing 'nana smiliey when you need it!
maverik-sg1
New member
Highland3r said:
Wheres the dancing 'nana smiliey when you need it!
Awwww Man - thats an Awesome set of specs there mate - shame its Multi locked - could of been uber - certainly some WR's in that chip, greta find
Gonna post me 4600 specs in here - gotta entice someone if the specs are as good as those.
Cheers
Mav
Highland3r
New member
LDBHE 0601 which is probably the best stepping X2 3800 to date as well! She's running 2.9ghz 1.52v rock solid at the moment, benchable to 3ghz w/1.52v too. CPU-z validated at over 3.2ghz 
this is just on water!
Hoping to get the mach1 overhauled, will be interesting to see how it does under ice
this is just on water!Hoping to get the mach1 overhauled, will be interesting to see how it does under ice
maverik-sg1
New member
This is my 4600, just under Highlanders 3800 in TCASE terms but she's good for 3.2 on phase - will post a 1.52v clock shortly:
maverik-sg1
New member
SAS91 said:
Shame im on stock cooling
I have to say that this is the golden sample of the golden samples!!
What a great CPU - If I was looking to go duallie under phase or water, I'd offer this guy my current CPU and some dosh - this should be a 3600mhz uber chip
