[QUOTE=garo;196737]Core temperatures in the 54-64 range depending on ambient temperature and the core number - 1&3 are running hotter for some reason and 4 is running the coolest (it is running P-1).[/QUOTE]

Just installed CoreTemp.

Idling temp is 28-34
Full Load Stock (not-OC) temp is 51-57 (core 1 hottest also).

What is considered a safe max temp?

[QUOTE=petrw1;197938]Just installed CoreTemp.

Idling temp is 28-34
Full Load Stock (not-OC) temp is 51-57 (core 1 hottest also).

What is considered a safe max temp?[/QUOTE]

Modest OC...I just used EasyTune and for the first attempt went to 3.0 Ghz. CoreTemp went to between 61 and 65.

[quote=garo;197365]Two things that made me chose the i5.
1. Overclocking potential. I have it Prime95-stable at 3800MHz with a good cooler and 0.1V extra.
2. There is minimal slowdown when running 4 LL tests in parallel. I would really like to see iteration times for the 620/630 when running four LLs.[/quote]
Finally able to spend a little [very little] time with the 630. Not enough time for any real experimentation. But I did get some results for 1280K FFT.
[code]
1 core: .26
2 cores: .26 (on both)
3 cores: .27 (on all 3)
4 cores: .29 (on all 4)
[/code]
I just ran the same exponent on all the cores and then deactivated each in turn give the changes. Didn't matter what cores were active, just the number of active cores.

@sdbardwick. Hmm! Not bad at all. The slowdown is in the 10-15% range which is very acceptable. Is this with DDR2 or DDR3?

@petrw1: I've heard the Core i5 and i7 can tolerate pretty high temperatures. I think you should be fine into the 70s. Just do a google. The Noctua is very very good so it keeps the temps well within the limit.

[QUOTE=garo;198026]@petrw1: I've heard the Core i5 and i7 can tolerate pretty high temperatures. I think you should be fine into the 70s. Just do a google. The Noctua is very very good so it keeps the temps well within the limit.[/QUOTE]

Thanks....just to compare I installed coretemp on my Q9550 with no OC but also stock Intel Cooler. Running GIMPS 100% on 4 cores.

Temp readings are 66 / 59 / 59 / 64....virtually the same as my i5 with Noctua cooler OC'd from 2.67 to 3.0

[quote=petrw1;198028]
Temp readings are 66 / 59 / 59 / 64....virtually the same as my i5 with Noctua cooler OC'd from 2.67 to 3.0[/quote]

Which Noctua cooler?
My temps are 62/58/58/58 on Q6600@2.9GHz running LLR 100 % on 4 cores, ambient temperature 15 ºC. Cooler is Artic Cooling Freezer Pro 7.

[QUOTE=em99010pepe;198038]Which Noctua cooler?
My temps are 62/58/58/58 on Q6600@2.9GHz running LLR 100 % on 4 cores, ambient temperature 15 ºC. Cooler is Artic Cooling Freezer Pro 7.[/QUOTE]

Noctua NH-U12P SE2

My ambient temp will be close to 28C. There are 4 PC's in the room and the window is painted shut

[quote=petrw1;198083]Noctua NH-U12P SE2

My ambient temp will be close to 28C. There are 4 PC's in the room and the window is painted shut[/quote]

That explain your temps, lot's of heat being dissipated in a high ambient temperature.

[QUOTE=petrw1;197938]Just installed CoreTemp.

Idling temp is 28-34
Full Load Stock (not-OC) temp is 51-57 (core 1 hottest also).

What is considered a safe max temp?[/QUOTE]

for 24/7 safe max for i7 is 80-85 core temp. safe for benchmarking, maxing out is up to 100 really.

not sure if it's the same with i5 though.

Don't want to hijack the thread, but it's essentially the same dilemma I'm facing.

I've come up with three different configs, an i5, an i7 and two Athlon II X4 systems (final price in US$):

[B]CORE i5 [/B]

Core i5-750:........................ $234
Gigabyte P55-UD3:................... $132
4G Kit DDR3 2000 G.Skill Ripjaws:... $145
Cooler Master Elite 335:............ $57
380W Antec EarthWatts:.............. $69
Scythe Ultra Kaze 120mm Fan 2000rpm: $22
Cooler Master Hyper 212+:........... $52

[COLOR=Blue][B]TOTAL:.............................. $711 (US$650)[/B][/COLOR]

[B]CORE i7[/B]

Core i7-860:........................ $335
Gigabyte P55-UD3:................... $132
4G Kit DDR3 2000 G.Skill Ripjaws:... $145
Cooler Master Elite 335:............ $57
380W Antec EarthWatts:.............. $69
Scythe Ultra Kaze 120mm Fan 2000rpm: $22
Cooler Master Hyper 212+:........... $52

[B][COLOR=Blue]TOTAL:.............................. $812 (US$742)[/COLOR][/B]
[B]
AMD ATHLON II X4 620[/B]

AMD Athlon II X4 620:............... $119
2G DDR3 1600 Patriot-Signature:..... $59
Gigabyte MA 785GMT-UD2H:............ $99
Coolermaster Hyper TX3:............. $29
380W Antec EarthWatts:.............. $69
Cooler Master Elite 335:............ $57

[COLOR=Blue][B]TOTAL:.............................. $432 (US$395)
(x2):............................... $864 (US$790)[/B][/COLOR]

In terms of pure prime95 output, does anyone know what the best value is? With the two AMD systems, I would obviously be paying more for power, but I have twice the cores.

With the i7, I don't know what the most efficient way to utilise the threads would be. A single worker between 1 physical and 1 virtual thread? A single worker between 2 physical and 2 virtual threads?

The most attractive looks to be the i5 as it is a nice balance between FLOPS/cost/wattage, but the more I think about it the more I get confused :blush::cry:

hj47,

What are the spec of your current system?

My dilemma is other, my current system is 10x faster than my previous one. I went from an AMD 3000+ (2GHz) to a Q6600@2.9 GHz. If I upgrade my current system to a core i5 it will only be 1.6x faster (overclocked). Maybe I'll wait for the core i9, I don't know.

Carlos