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CPUs and Heatsinks

03/28/2009 4:10 AM

Hi, I am building a PC with AMD Phenom X3 2.3ghz, which is 95 watts and was looking to buy Arctic Cooling Alpine 64 PWM (http://www.ebuyer.com/product/150270) but on ebuyer it says it only supports up to 90 watts, but other sites say it supports Phenom X3 Do 5 watts really matter? Thanks

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#1

Re: CPUs and Heatsinks

03/28/2009 10:13 AM

Yes, watts matter.

'only supports 90 watts' is nonsense.

Heatsink/fans' performance are rated in units of deg C/watt so for every watt the CPU dissipates it will heat up a certain number of degrees in temperature. For example some cheap stock HSF's are rated 0.4 degC/W so your 95 watt CPU will operate 38 degs C above ambient. If ambient is 25 deg C then the CPU will be at 63 deg C (way too hot). Modern, well designed HSF's are rated around 0.25 degC/W which would bring you down to 48 deg C (comfortable). Watercooling setups get 0.18 to 0.2 degC/W which would bring you down to 42 degC (cool as a cucumber).

Make sure to use high quality thermal grease (e.g. Arctic Silver) and be careful to apply a thin, even layer of it on the CPU before attaching the HSF as this can have a big impact on its performance.

There's some good info on CPU cooling here: http://www.overclockers.com/

Cheers

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#2

Re: CPUs and Heatsinks

03/28/2009 11:48 PM

Hi Bondy,

For what it's worth Scythe SCMG-2000 120mm Sleeve CPU Cooler is a recommended cooler for the tri-core, it has been noted heat pipe technology should be observed with this CPU.

Arctic Cool is notable but at $10

my 2 cents...

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#3
In reply to #2

Re: CPUs and Heatsinks

03/29/2009 2:37 AM

£42! That's almost as much as the motherboard!

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#4
In reply to #3

Re: CPUs and Heatsinks

03/29/2009 3:53 AM

Nah! $40 @ newegg.com

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#5

Re: CPUs and Heatsinks

03/29/2009 4:04 AM

Hi Bondy,

If you are concerned use a good quality case the type which has a side cooling fan on the case these have an internal funnel which can direct a large amount of air or extract depending what your preference is over the CPU area [ check the CPU temperature with both methods] this will probably make up a difference of 5 watts easily, this is only probably when the CPU is running under maximum stress anyway, are you going to play memory hungry games? if not you probebly will never aproach the maximum.

Also a side fan is cheap.

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#6
In reply to #5

Re: CPUs and Heatsinks

03/29/2009 4:26 AM

Hi Garth,

I was going to suggest COOLER MASTER Centurion 5 CAC-T05-UB Black /Blue Aluminum Bezel , SECC Chassis ATX Mid Tower Computer Case.

Is a roomy case with two 120mm fans. one in front draws air into the case cooling the HD's and another exhausting from the rear. I normally set them at medium run constant and as the power supply would then also exhaust. The entire front is grill with filter so is no lack of cooling capacity. With the CPU set to run at temperature control from the BIOS all is well. Is a very sweet deal $55USD

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#7
In reply to #5

Re: CPUs and Heatsinks

03/29/2009 7:55 AM

I'm using http://www.ebuyer.com/product/126610 - It will be for gaming, but not totally serious - mainly building it so it can run GTA4 PC, and before anyone says, yes I am going to get a good graphics card for it... 512 or 1gb, undecided...

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#8
In reply to #7

Re: CPUs and Heatsinks

03/29/2009 8:06 AM

Bring life back to an older MSI Motherboard.

I only use the computer for CAD; PCB design, Schematics, Photoshop, Research and e-mails, I'm not a gamer and was only looking to support my Engineering needs, which is in the Aerospace field at JHU/APL.

After many weeks of reviewing what would work I came up with these items.

Note the MB is a MSI 7046, supporting a Pentium 4 Processor 530 HT 3GHz, FSB 800, Chipset 915, from a Medion Composer 5100 Model.

Starting with the Case; using a Thermaltake Armor MX VH8000BWS, which is easily upgradeable to water cooling or an AC unit, tho at the moment not needed because of the newer CPU cooler. The case comes with three fans; one very large side mounted which provides extra cooling for the Graphics Card, one in front that keeps the hard drives cool and one in the rear which vents the hot air.

Changed out the power supply to keep up with the newer graphics card current(amp) rating and other support items; Tagan BZ800 Modular, which is very nice, I don't have to deal with that large bundle of cables anymore, I connect the cables as needed, the remainder cables are store in a nice cable pouch which comes with the supply.

Throw out the old CPU cooler for an Arctic Cooling Freezer 7 Pro; Thermal Resistance: 0.17°C/Watt, the fan only comes to life under heavy CPU loading and is very silent, CPU is now running much cooler, note also the back part of this cooler has fins which point down providing air for the DC Power Switchers as well. This is a large cooler and with the MB on its side it doesn't appear to be a problem with the extra weight attached to the CPU fixture and MB.

Updated the cooler for the Chipset as well, it was always running hot; heatsink with no fan, now very cool with a larger heatsink with fan.

Changed out the old RAM for newer Crucial, now running 3GB, tho I am thinking of changing the OS to 64bit; running 32bit at the moment, to allow for more RAM above 4Gb. Note, more RAM does help for CAD operations.

Added an LCD; ACER P201W 20" wide screen monitor to complement the CRT ViewSonic monitor for Photoshop and CAD, love the split screen work. Spec: 5ms response time, resolution of 1,680 x 1,050, a luminance of 300cd/m2 and a contrast ratio of 2,500:1.

After many yrs running the older Graphics FX card, it finally die, I blame it on the older AIRLX case with limited air flow used for the Medion Composer 5100 model, another reason to upgrade. I hoping this new card; MSINX8400GS, will handle the CAD and the Photoshop program well, if not I will have to buy the NVIDIA Quadro FX. At the moment tho, the Graphics card is working out very nicely and supports both monitors, and is fan cooled as well.

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