2x NV5 Silencer

[D_o_S]

Will 2 of these fit on a DFI nF4 SLI mobo?

[texuspete00]

If they didn't then ultras wouldnt fit either. I'm going to go out on a limb here and suggest that yeah... they most definitely would.

[orig3n]

Forget about it, the tip of the prop would hit the the other card and all it would pull in is heat. I tried 2 in my ASUS sli board and i can tell it would be VERY close.

[D_o_S]

So should I keep the reference cooling? How about the Zalman VF700?

[orig3n]

Dont know if you would work :confused:

2. This product cannot be used with Matrox VGA cards and NVIDIA PCX series VGA cards

[D_o_S]

Yes, but somewhere I read that only applies to the PCX series (PCX5750), and because the nVida 6800Ultras are going to have the same PCB as the AGP ones, there should be no problem.

[orig3n]

Yeah my bad, it will work, i finally understand, they are refering to that heatsink that sits near the core on a 45 degree angle ;) it will fit my 6800gt's fine

i went and got 2 today for my sli rig :banana:

[MarilynMX]

you can adjust the product photos and put them together see if they will fit. I've seen someone virtually put a Zalman 7000 HS on a DFI nf4 SLI board. "it's not too subtle, but effective"

[orig3n]

Ive installed 1 on each of my cards and they fit fine :banana: 50c idle from 67c :slobber:

[c42]

How close of a fit?

[orig3n]

Plenty of room, it would be tight with a DFI or MSI mobo though, actually i think these are about as good as you can get with a board that has 1 slot between the x16 connectors.

[matt9669]

The NV silencers will fit, but there's no question the top one would have difficulty pulling air in (the backside of the 6800 isn't that hot, but with restricted space below the fan airflow would suffer . . .)

According to Zalman, the VF700 requires that the slot below be clear, but does not require the one below that - meaning even on the DFI (which I'm personally gunning for) there should be no problems fitting.

I was thinking of getting 2x silencers, and on the top one trimming the plastic around the fan so it had more room to breathe. If it would work, the coolers would A) exhaust the hot air, B) actively cool the RAM and C) be cheaper.

Anywho, just me $0.02 - orig3n, mind doing some load temp and max. overclock tests for us to get a better feel of how the Zalman compares to stock?

[orig3n]

Card 1:

Stock - 404/1130 - 67c
VF700 - 416/1140 - 54c

Card 2:

Stock - 435/1210 - 66c
CF700 - 438/1220 - 54c

I am telling you now that 2 Silencers will not fitDFI/MSI boards, they take up the whole adjacent slot and take a few mm after it aswell due the to prop sticking out and the bolts on the back of the other card. I have measured it. If you somehow managed to wedge it in, it would just suck heat in off the mosfet area of the top card and it would overheat. Even on the Asus that card runs 10c above the other but the zalman levels em out.

The Zalman will fit the DFI board but you must cooler them from above otherwise 1 will run very high temps.

Another little thing i found is that you can keep the old blower fan on next to the vf700 heatsink ;)

[matt9669]

Hmm - that's too bad two of these won't fit, I'd think the NV5 would be better suited in both price and thermal design (considering the hot air is exhausted and no further airflow is required).

Do you think it would be worth modding them to fit somehow? You could extend the fan portion of the top silencer out past the end of the card(s), affix it with a plastic and/or acrylic panel and epoxy combo, something to that effect . . .

[orig3n]

Its not worth it, it will just suck 50c heated air off the mosfet area of the other card and do nothing if you manage to get it in in the first place.

[matt9669]

What about modding the top one such that the fan draws in cool air? I know this would be a :banana: :banana: :banana: :banana: :banana: but I think it's the best way to cool the card - I could be wrong :p:

Also, what about doing the bottom card on a silencer and the top on the Zalman/like? That would at least exhaust the hot air from one of the cards . . .

[Manoj]

Card 1:

Stock - 404/1130 - 67c
VF700 - 416/1140 - 54c

Card 2:

Stock - 435/1210 - 66c
CF700 - 438/1220 - 54c

I am telling you now that 2 Silencers will not fitDFI/MSI boards, they take up the whole adjacent slot and take a few mm after it aswell due the to prop sticking out and the bolts on the back of the other card. I have measured it. If you somehow managed to wedge it in, it would just suck heat in off the mosfet area of the top card and it would overheat. Even on the Asus that card runs 10c above the other but the zalman levels em out.

The Zalman will fit the DFI board but you must cooler them from above otherwise 1 will run very high temps.

Another little thing i found is that you can keep the old blower fan on next to the vf700 heatsink ;)

Can you show us some pictures of your Geforce 6800GT SLI with the Zalman CF700 cooler?

[orig3n]

What about modding the top one such that the fan draws in cool air? I know this would be a :banana: :banana: :banana: :banana: :banana: but I think it's the best way to cool the card - I could be wrong :p:

Also, what about doing the bottom card on a silencer and the top on the Zalman/like? That would at least exhaust the hot air from one of the cards . . .

Trust me its just not worth it lol, get a set of Zalman coolers and you temps will improve by like 10c...

http://users.bigpond.net.au/aokman/zalman1.jpg
http://users.bigpond.net.au/aokman/zalman3.jpg
http://users.bigpond.net.au/aokman/zalman4.jpg

[matt9669]

LOL okies I'll give it up - the silencer is just a much neater solution, no ramsinks, no dangling fan wires . . . :(

You know, I'm surprised Arctic doesn't have an SLI version out . . . they'd sell quite well I'd think, with all the horror stories of cramped SLI cards and overheating etc. :stick:

EDIT: Origin - is that the 600W OCZ PS?

[Manoj]

The Zalman CF700 will be able to fit properly on the DFI LanParty Nforce4 SLI-D right?

[craig588]

LOL okies I'll give it up - the silencer is just a much neater solution, no ramsinks, no dangling fan wires . . . :(



Running fans off of headers on a board will draw power from the already starved card. Those 3-4 watts the fan uses are 3-4 watts the GPU will never see.

[blueworm]

The Zalman CF700 will be able to fit properly on the DFI LanParty Nforce4 SLI-D right?
I'm not to sure about that. I have one installed on my k8n neo. There seems to be about
3mm clearance between the lowermost part of the zalman HS and the begining of the next available PCI slot. And you have to bare in mind the back plate on the zalman is at least 8mm high.

[matt9669]

Wow, this is really becoming a pain - wonder why ASUS was the only company to put two slots between 16x cards?

[Manoj]

I'm not to sure about that. I have one installed on my k8n neo. There seems to be about
3mm clearance between the lowermost part of the zalman HS and the begining of the next available PCI slot. And you have to bare in mind the back plate on the zalman is at least 8mm high.

Do you have any pictures of your Geforce 6800 GT cards installed on the K8N Neo4 SLI with both Zalman CF700?

[matt9669]

His sig suggests he has the Neo2 aka nForce3 - anyone running these Zalmans in SLI on a NF4 board other than the ASUS?

[blueworm]

His sig suggests he has the Neo2 aka nForce3 - anyone running these Zalmans in SLI on a NF4 board other than the ASUS?
No I have a socket 754 MSI Neo platinum. But regardless the spacing between expansion slots is an ATX norm 20mm. Asus uses 2 spare lots between x16 PCI-e slots.
DFI and MSI are using 1 only.
I can see exactly how much space there is by inserting a PCI card beneath my 6800GT with zalman VF700.
http://www.telefonica.net/web2/blueworm/zalmanGap.jpg
There is only 4mm gap. This would not be a problem except that the backplate on the zalman is at least 8mm tall. So therefore the backplate on the second card will be touching the fan on the first card.
This can probably be remedied by shortening the standoff's on the backplate of the second card.

[D_o_S]

Thanks for the info everyone :)

[Manoj]

You can just remove the backplate on the second card and it will be okay. The heatsink will not be affected.

I just installed the Zalman ZF700 heatsink on each of my Geforce 6800 GT cards and it was a tight fit. I have the DFI Lanparty Nforce4 SLI-D.

The temp when idle is not that much different from the stock heatsink (about 3 to 4 degrees C). At full load the temp difference is about 7 to 8 degrees C.

So on the whole the Zalman ZF700 is a good cooler for Geforce 6800 GT.

[Manoj]

Card 1:

Stock - 404/1130 - 67c
VF700 - 416/1140 - 54c

Card 2:

Stock - 435/1210 - 66c
CF700 - 438/1220 - 54c




Are these temps in SLI mode or just when testing each card individually?

[eva2000]

i think individually :)

[Manoj]

i think individually :)


I thought so.

If they are setup in SLI mode, then the cards will run hotter.

[blueworm]

You can just remove the backplate on the second card and it will be okay. The heatsink will not be affected.

I just installed the Zalman ZF700 heatsink on each of my Geforce 6800 GT cards and it was a tight fit. I have the DFI Lanparty Nforce4 SLI-D.

The temp when idle is not that much difference from the stock heatsink (about 3 to 4 degrees C). At full load the temp difference is about 7 to 8 degrees C.

So on the whole the Zalman ZF700 is a good cooler for Geforce 6800 GT.
Photos pleaseeeee It must look sweet.
:banana4:

[Jamo]

may i suggest using the stock coolers and affixing an 80mm/120mm fan blowing sideways over both cards, this is what i do with my 6600gt's (ok i know there not 6800's but the priciple is the same)

[Manoj]

Photos pleaseeeee It must look sweet.
:banana4:

Here are some pictures of my Geforce 6800GT SLI with Zalman Cooling.

http://premium1.uploadit.org/ManojM//VF700c.JPG

http://premium1.uploadit.org/ManojM//VF700b.JPG

http://premium1.uploadit.org/ManojM//VF700a.JPG


My Results:

3DMark 2003 with WHQL FM approved drivers
= 22251 3DMarks

http://service.futuremark.com/compare?2k3=3680020

3DMark 2003 with non WHQL FM approved drivers
= 23212 3DMarks

http://service.futuremark.com/compare?2k3=3680011


3DMark 2005 with WHQL FM approved drivers
= 10197 3DMarks

http://service.futuremark.com/compare?3dm05=564162

3DMark 2005 with non WHQL FM approved drivers
= 10786 3DMarks

http://service.futuremark.com/compare?3dm05=564155

[matt9669]

Thanks for those Manoj, the Zalmans do not look overcrowded in the DFI so methinks I'm getting some of those :D

How much would you say they've improved your overclock? Do you think the additional cooling would handle 1.4 or 1.5V?

[Manoj]

Thanks for those Manoj, the Zalmans do not look overcrowded in the DFI so methinks I'm getting some of those :D

How much would you say they've improved your overclock? Do you think the additional cooling would handle 1.4 or 1.5V?


I am not sure about the Voltage since I have running the cards at default voltage and they can do 425mhz core and 1.1Ghz mem in SLI mode.

Before I could only do 405mhz core and 1.1Ghz mem with stock cooling.

This is with the DFI Lan Party Nforce4 SLI-D.

[matt9669]

Interesting, thanks for the info. :up:

[J-Mag]

may i suggest using the stock coolers and affixing an 80mm/120mm fan blowing sideways over both cards, this is what i do with my 6600gt's (ok i know there not 6800's but the priciple is the same)

I put a 120mm Panaflo M1 over both my 6800gt's and it dropped the temps from 42 C to 28 C (although one card always seemed to run ~2 hotter... ), until I snapped off one of the fan blades while moving it when the fan was on.
:cool: ( I always feel like an idiot when I break fans, but thankful I didn't break a delta or tornado as I would have a broken finger too)

[Abula]

Here are some pics of twin 6800GTs with NV5 mounted on, dont know if it will fit you MSI, this is on an ASUS.

http://img.photobucket.com/albums/v170/OS-Wiz/vidcard_0006.jpg
http://img.photobucket.com/albums/v170/OS-Wiz/102_0206.jpg

[skitzogamer]

Where are the power cables for your videocards?

[BlueMagician]

may i suggest using the stock coolers and affixing an 80mm/120mm fan blowing sideways over both cards, this is what i do with my 6600gt's (ok i know there not 6800's but the priciple is the same)I was thinking about this.. I've bought a 120mm fan and grille, and was going to cut a hole in my case side panel, directly over my two 6800GT's and mount it there - my ony worries are:

Do I suck or blow?

If I suck, I risk starving the stock coolers of air. If I blow, the heat they generate just gets spread around the case - surely expelling it would be better?

Hmm... What does everyone think?

Many thanks,
S. ;)

[Cpt Twitchy]

@ Abula thast very cool looking. I like it :YIPPIE:

[Jamo]

Do I suck or blow?

Many thanks,
S. ;)

i find using a fan blowing air gives much better results and doesnt raise temps that much i might have seen a 2*C increase in case temp