X800 XT PE and tec

[shidokanjohn]

Hi to all
I would like to ask tec experts if a 142watt tec with water on it can handle the card at 1.75vgpu
Thanks in advance

[jokester]

Well my 172W TEC handles my PE at 1.75V and it's only working at about 100W until I get a 24V PSU.

Jokester

[shidokanjohn]

Ok thank's mate.
Do you know at load temps?

[charlie]

even the 80w will deliver the goods.... and prob give you 700ish....OC

C

[jokester]

Load temps for me is about 18C at 660MHz

Jokester

[shidokanjohn]

Ok Thanks a lot for your answers :toast:

[HiJon89]

I won an X800 XT PE on eBay and it had a GPU voltage mod done, how much voltage is safe with a MCW50-T with the 80W pelt replaced with a 172W one running off of an OCZ PowerStream 520W. I'm going to get 3/8" stem to 1/2" ID converters and have the MCW50-T on its own loop with a DangerDen D4 pump, Heater Core radiator with 2 1" shrouds and 2 120MM fans. About 1.75V is safe right?

[Bungo]

I Use 1.75v for 24/7 on plain water.

I think the problem ain't if the core/sorrunding temp is high, cause those are easy to keep down. Its the enourmus heat on other places of the pcb when running high v.
(around the power connector/vgpu resistor area).

So if u plan to run higher than 1.7v, place a fan directed "over" the gfx and keep decent air-flow.

But im no expert. Thats just my personal experience.

[shidokanjohn]

Today i placed a 80watt under my block(homemade) and now i have -5 idle +14 load
Now i can run the card at 473(461 when i had only water)
here is some test i did
:)
Thanks all for your answers.http://www.thelab.gr/attachment.php?s=&postid=156841
http://www.thelab.gr/attachment.php?s=&postid=156866
and links
http://service.futuremark.com/compare?2k1=8383115
http://arc.aquamark3.com/arc/arc_view.php?run=1963210078

[enzoR]

nice results.

[shidokanjohn]

Thanks

[felinusz]

You should consider going to a 172W/24V TEC - even when run on 12V, these TECs are superior to 80W/16V units. They don't cost much, and make a signifigant difference.

Grab a cheap 24V variable PSU (I got mine for $9 on eBay) off of eBay, and you'll have load temperatures a good ~10 degrees celcius lower than you currently have. That 10 degrees celcius will also signifigantly raise your card's overclocking potential.

$30 for 10 degrees celcius lower ain't bad at all ;)

[p4z1f1st]

You should consider going to a 172W/24V TEC - even when run on 12V, these TECs are superior to 80W/16V units. They don't cost much, and make a signifigant difference.

Grab a cheap 24V variable PSU (I got mine for $9 on eBay) off of eBay, and you'll have load temperatures a good ~10 degrees celcius lower than you currently have. That 10 degrees celcius will also signifigantly raise your card's overclocking potential.

$30 for 10 degrees celcius lower ain't bad at all ;)

there is something, they call "electric-bill" ;)

[felinusz]

there is something, they call "electric-bill"

O.K. - fair enough :)


Cost of electricity here where I live (Toronto, Canada) - 4.3 cents per Kilowatt hour.

Amount of electricity that a 172W/24V peltier on 24V uses (mind you, I ran my 172W/24V peltier on 22V, this proved to be the 'sweet spot', where efficiency isn't countered at all by increased heat output) - 0.172 Kilowatts.

So, lets say we run our machine 24 hours a day, 7 days a week. 24 X 7 = 168 hours a week.

(168 X 0.172) X 4.3 = 124.25 (cost of running a 172W peltier for one week, in cents)

Therefor, It costs you ~$1.25 Canadian Currency (less when you undervolt the peltier slightly) to run a 172W peltier for a week straight (in Toronto - the cost of electricity is different everywhere). That isn't very much money.


I am unsympathetic about your power bill concerns ;) ;).

However, I'm still in High School, and my parents pay the electricity bills around here, so I get off scott-free regardless :D.

[shidokanjohn]

I' m going to buy this week a 142w tec at 12v...
I will post the results.Hope to be good:)

[felinusz]

I hope that you have a dedicated 12V PSU for that peltier, or a very, very good computer PSU; that peltier will draw ~12 Amps (maximum) off of your PSU's 12VDC rail.

[shidokanjohn]

I hope that you have a dedicated 12V PSU for that peltier, or a very, very good computer PSU; that peltier will draw ~12 Amps (maximum) off of your PSU's 12VDC rail.

Hi
I have 2 psu's
For motherboard,video card and hard disks enermax 465 modded at all rails
For cd drives prometeia fun's and tec Antec 550 true control..So antec i believe won't have any problem
:D

[felinusz]

Hi
I have 2 psu's
For motherboard,video card and hard disks enermax 465 modded at all rails
For cd drives prometeia fun's and tec Antec 550 true control..So antec i believe won't have any problem


Hehehehehehehhee

You my friend, are all set :D

[charlie]

For benching, not many things beat:
MCW50-t w/ 172w/24v pelt
5 gallon bucket
2 bags of ice
Pump

Bench with icewater and you get single-phase like temps....
easy and the insulation on the Swiftech works great!

C

[felinusz]

For benching, not many things beat:
MCW50-t w/ 172w/24v pelt
5 gallon bucket
2 bags of ice
Pump

Bench with icewater and you get single-phase like temps....
easy and the insulation on the Swiftech works great!

C

Just keep adding Ice, and removing water.... wow, that would work really well, yet it's so simple and inexpensive! :)

And you don't even need a radiator, or even a fan! Charlie, you're a genius :)