Gf4 Pelt

[AllRoy]

Does anyone actually sell a coldplate for a gf4 waterblock, if not...what is everyone using for their gpu pelt setup?

[Brad]

I don't know of anything sold specifically, most people are just buying normal cpu blocks and modifying them to fit into the holes

[eX&TriC]

get yourself a good pelt because mine 46W
(62W@12V) is barely enough.

GF4 is voltagemodded 1.95V instead of 1.65V

[Haddy]

mmmmmmmm gf4 voltage mod......

[eX&TriC]

mod is very simple 580Ohm resistor

no mod > 315
mod + original cooling > 340
mod + pelt 46W (62W@12V) 355
mod + pelt 86W(172W 24V@12V) 3??

memory 780 stock no mod

>> fastest P4 2400 3DMARK )

[AllRoy]

I have heard bad stories about the mod and the Gainward Ti4600

[eX&TriC]

No problem with my MSI.
Do not know if the rest uses the exact same
reference design. You should avoid as much
heating everything up with long contact between
the soldering iron and the chip. If not you can
damage the chip and/or the card. Nothing for
newbies to try

[AllRoy]

Just reading through icrontic....seems every card has no prob except the Gainward.

[Haddy]

Originally posted by eX&TriC
mod is very simple 800Ohm resistor

no mod > 315
mod + original cooling > 340
mod + pelt 46W (62W@12V) 355
mod + pelt 86W(172W 24V@12V) 3??

memory 780 stock no mod

>> fastest P4 2400 3DMARK )

give me another gf4 and ill do it for ya =)

[AllRoy]

I would like to know too!

[eX&TriC]

GPU:
Semtech SC1102
Pin 11 resisorX to ground pin 14

X = 0 > 1.65V original
X = 1300O > 1.758V +8%
X = 580O > 1.95V +18%
X = 400O > 2,05V +24%

mem voltage mod for Ti4400&Ti4600
not 4200!!!

Semtech SC1175CSW (same as GF3)
SAMSUNG BGA mem IO 2.8V and Working 2.8V (according to
samsung data sheets)

Pin 3 resistor Y1 to ground pin 20
Pin 18 resistor Y1 to ground pin 20


Y1 = ? O >> ??V
Y2 = ? O >> ??V
if some has some voltage/resistor reading on the mem
please let me know

have fun

[sysfailur]

I will be selling GF4 front and back cold plates and GF3 cold plates in about a week and 1/2 @ www.maximumoc.com

GF3 OC: 305/615
GF4 OC: (dunno, fried the thing before I got a chance to bench )

GF4 cold plates price $55
GF3 cold plate price $45


These prices include 2-3 day shipping to anywhere in the US.

Pictures:

GF3 plate:



GF4 plate:

[jtroutma]

Sysfailur:

HOw big of a pelt do you have on those pics? 80W? MOre?

[sysfailur]

Originally posted by jtroutma
Sysfailur:

HOw big of a pelt do you have on those pics? 80W? MOre?

156w on front of GF4, 85w on the back.

85w on the front of the GF3.

[jtroutma]

And you dont have a problem with condensation building up on the GF3?

(Thinking about getting one of those blocks and putting on a slightly smaller pelt)

[sysfailur]

Originally posted by jtroutma
And you dont have a problem with condensation building up on the GF3?

(Thinking about getting one of those blocks and putting on a slightly smaller pelt)

Well as you can see there is condensation all over the GF3 plate. But that is because I didn't put any neoprene on it. The GF4 had much better protection neoprene-wise but I didn't put any silicone on it which fried it... ( I didn't notice it melting in one spot)

[AllRoy]

Are your plates going to have a screwdown method or will we need to clamp?

[sysfailur]

Originally posted by AllRoy
Are your plates going to have a screwdown method or will we need to clamp?

I'm leaving the hold-down up to the customer. If you want you can drill holes, but some people don't want holes, and I really don't have the time to drill them, or not drill them to each persons order. So they come with no holes.

[Kevin]

Cold plates were initially developed because P3 cores would crack if a rapid temperature change occurred. That would slow down the process. However, that was just because of their FCPGA design. You don't need to use a cold plate if you don't want to. they will keep your temps from fluctuating as much, but they are not necessary.
-Kev

[sysfailur]

Originally posted by Kevin
Cold plates were initially developed because P3 cores would crack if a rapid temperature change occurred. That would slow down the process. However, that was just because of their FCPGA design. You don't need to use a cold plate if you don't want to. they will keep your temps from fluctuating as much, but they are not necessary.
-Kev

Emmm did you post on the right thread?

[AllRoy]

Originally posted by Kevin
Cold plates were initially developed because P3 cores would crack if a rapid temperature change occurred. That would slow down the process. However, that was just because of their FCPGA design. You don't need to use a cold plate if you don't want to. they will keep your temps from fluctuating as much, but they are not necessary.
-Kev

How can you pelt without them?

[sysfailur]

Originally posted by AllRoy


How can you pelt without them?

You can put the pelt right on the chip. I did that w/ my old Ti200.

[AllRoy]

Up to what wattage?

[jtroutma]

I liked the plate because it cools the GPU and the RAM at the same time. Dont need as muchb cooling on the RAM as you do on the GPU so that looks like a nice setup.

Now I just ahve to justify getting one of those plates.....

[Kevin]

Allroy - you can check my article on cooling the Kyro II w/ a pelt. I didn't use a cold plate there. I would actually reccommend making a second cold plate just for the RAM as it is very difficult to have that cold plate fit perfcectly. Keep in mind that if it is slightly off in measurements, it will not cool well as the contact will be poor.
-Kev