New EK-Supreme HF (High Flow) CPU Block

[Bartflaster]

Max stable I think is limit of cpu (4ghz), or at least at the limit of the voltage I am prepared to push through it
Currently that pushes to 50 deg on prime's max heat/power tests ...

[Nickel020]

If you don't want to give the CPU more voltage then there's probably not much point in getting a new cooler (other than getting a new cooler being fun ). You would probably drop your temps to like 45C, but you won't be able to really OC higher without adding voltage. At 50C max I also don't see much of a need to upgrade your block for the summer, even a 10C room temp increase will leave you at a comfortable 60C for the CPU.

[astrodanco]

Seriously - someone linked me a review over in the UK where a guy testing dual D5's suggested it outputted 500LPH when both are on full.... er what?

Hmmm, I have an EK-D5 Dual Top with two D5s (two Swiftech MCP-655-B) in series. My flow meter is telling me that I'm getting 8.2 LPM. That's 492 LPH through my cooling loop, which is reasonably close to 500 LPH. Something wrong with that?

[Bartflaster]

If you don't want to give the CPU more voltage then there's probably not much point in getting a new cooler (other than getting a new cooler being fun ). You would probably drop your temps to like 45C, but you won't be able to really OC higher without adding voltage. At 50C max I also don't see much of a need to upgrade your block for the summer, even a 10C room temp increase will leave you at a comfortable 60C for the CPU.

Thanks Nickel020.
No, further overclocking wasn't my aim, to lower temps was. Dependng on how much lower, was it going to be worth buying a new block for.
Your answer clears that up, if its only 5 degrees then I dont think so .... yet.

I knew that a quad would not run as cool as the duals, but I was a bit dissapointed to see 50 deg
Now my GPU runs far cooler than my CPU, thats a turnaround from my last setup !

If I start pushing to 60 in summer I will be worried, don't these chips have a 62 deg limit ?

[Nickel020]

What temperature are you referring to here? The temp that's output by CoreTemp, RealTempt etc. or something else? I'm not too familiar with Phenoms IIs (I have one but no epxerience OC'ing it), but 50C seems damn good to me, on Intel its really hard to get below 50C on a quad at 4GHz... You have to be aware though that there are different diodes on every CPU that measure "CPU temp", some measure the temp of the heatspreader, while some do actually measure the temp of the die. The die temperature is what's commonly used, the heatspreader temp tends to be quite a bit lower.

There definitely is no 62C die temp limit, for stock speeds Intel has a ~100C limit for example for most CPUs (some more, some less). I'm not sure what it is for AMD, but it has to be somewhere in that region. If you see people talking about 60-75C being the maximum that you should let your CPU get to then they're just wrong. The reason why these numbers continuously pop up is because those are the temps where most people's max 24/7 overclock on air/water becomes unstable, not because it's dangerous for the CPU (that's just based on the wrong assumption that system crashes are bad for the CPU).

Just search forums for reports from people who managed to kill their CPUs on air/water - you'll find this is extremely rare, every other part in your system will have died 5 times before your CPU dies. So don't worry about the CPU temp, if it's stable with some headroom temperature-wise then all is well You can disable some radiator fans to find out if you have some temperature headroom.

[Bartflaster]

I have heard mention of the 62 in several places, just did a google and found this: http://www.cpu-world.com/CPUs/K10/AM...5FBGMBOX).html

"Electrical/Thermal parameters
V core (V) ? 0.825 - 1.4
Maximum operating temperature (°C) ? 62
Thermal Design Power (W) ? 125"

The temperature I am reporting is from the "core" reading on HWmonitor.

[Nickel020]

As I said, that 62C is probably meant "Tcase", the temp of the heatspreader, not the die temp that's reported by HWMonitor. You should go to the AMD forum though for an exact explanation, I've been too much of an Intel man in the last 2.5 years to be sure about this^^

[Bartflaster]

Hmm, trying to find some software to read the t-case temp ... HWmonitor probably does it, but unsure if its listed as tmpin0 or 1, the website doesn't say.

[M_T_M]

I wonder what is the best plate for fast movement?

[Church]

If you mean for most flow, then least resistive one of course. With most cutout lines. But imho nevertheless most resistive P#1 should be used, as even with it HF is less resistive then old Supreme / HK3 / Apogee XT, yet beating them in temps.