quad 280X cards without risers ?

[qwertywarrior]

hi guys

since there arnt any blower coolers for the 280x available

would they over heat if they were side by side ?

[Jobbe03]

Probably, it's not worth the risk imo.

[BRiteBak]

If you are mining why not use risers?

[qwertywarrior]

If you are mining why not use risers?

a friend of mine really wants to use it in a case

i already told him that he should get a 290 because of the blowers since the 280x cards dont have blowers

 

ill try to let him  reconsider

 

 

 

thanks guys

[BRiteBak]

a friend of mine really wants to use it in a case

i already told him that he should get a 290 because of the blowers since the 280x cards dont have blowers

 

ill try to let him  reconsider

 

 

 

thanks guys

For mining like that with all the cards side by side you really wont get enough airflow in a case

[jscho]

I've seen plenty of builds that use these coolers in 3 or 4 way SLI and CrossFire right next to each other. Temps are fine as long as you have a decent amount of intake and exhaust fans. Say 2 front intake (maybe a bottom one too if possible) and 2 top exhaust + rear exhaust. Temps are usually pretty nice with WindForce coolers, even when close together. You really don't need a shit tonne of space between cards. The 'tiny' gap between cards in 4-way configs is enough. Keep them at stock clocks and chances are they won't overheat.

[Alex780]

When I had both my 7950 twin frozr and r9 280x dc2T mining, the top card (directcu) was overheating to death (over 95C), unless I put a ghetto mounted 120mm fan blowing air right on the card. It made the whole setup extremely loud. So based upon my experience, I would recommend blower style designs for crossfire configurations.

[beefalo]

It would be ok if they were open air and you pointed a box fan at it.  Don't put that in a case though.

[Virgule]

hi guys

since there arnt any blower coolers for the 280x available

would they over heat if they were side by side ?

 

First of all, I'm guessing this is the Gigabyte R9 280x OC.

 

I burnt 2 of these mining so far (well they were hd7970 in fact, but same cards). Another is in my case for gaming (because I didn't want to mine anymore with it) and it's flickering and crashing sometimes. So yeah. I hate that card.

 

If it's just me being unlucky, I can say this card runs HOTTTTT when mining. I'm talking - 88 oC and climbing so you stop cgminer - HOT. So I would NOT recommend putting them close by unless you have an industrial fan blowing on them and/or under an open window to winter wonderland.

 

Also, if you're not using any risers my guess is you're blocking other PCIe 1x/16x lanes. Another reason to use risers (to use more cards, that is).

[Virgule]

I've seen plenty of builds that use these coolers in 3 or 4 way SLI and CrossFire right next to each other. Temps are fine as long as you have a decent amount of intake and exhaust fans. Say 2 front intake (maybe a bottom one too if possible) and 2 top exhaust + rear exhaust. Temps are usually pretty nice with WindForce coolers, even when close together. You really don't need a shit tonne of space between cards. The 'tiny' gap between cards in 4-way configs is enough. Keep them at stock clocks and chances are they won't overheat.

Yes but he's talking about mining which is nothing close to gaming in terms of usage. The former generates a ton more heat than the latter.

[qwertywarrior]

First of all, I'm guessing this is the Gigabyte R9 280x OC.

 

I burnt 2 of these mining so far (well they were hd7970 in fact, but same cards). Another is in my case for gaming (because I didn't want to mine anymore with it) and it's flickering and crashing sometimes. So yeah. I hate that card.

 

If it's just me being unlucky, I can say this card runs HOTTTTT when mining. I'm talking - 88 oC and climbing so you stop cgminer - HOT. So I would NOT recommend putting them close by unless you have an industrial fan blowing on them and/or under an open window to winter wonderland.

 

Also, if you're not using any risers my guess is you're blocking other PCIe 1x/16x lanes. Another reason to use risers (to use more cards, that is).

when ur cards burned where they on risers ?

or stuck together ?

or a pci apart ?

 

anyways he is gonna stick with quad 290

and i have a spare delta fan from back in the day

[Virgule]

when ur cards burned where they on risers ?

or stuck together ?

or a pci apart ?

 

anyways he is gonna stick with quad 290

and i have a spare delta fan from back in the day

Risers, maybe 3 inches away (which is plenty more than without risers) and under the window cracked open (-20oc outside right now).

 

Maybe I had a crappy batch but from what I've seen from a few days of "normal" usage, and from general mining experience, they get HOT.

[qwertywarrior]

Risers, maybe 3 inches away (which is plenty more than without risers) and under the window cracked open (-20oc outside right now).

 

Maybe I had a crappy batch but from what I've seen from a few days of "normal" usage, and from general mining experience, they get HOT.

i wonder did u set the fans at 100% ?

 

how did they die ? burnt VRMs ?

[Virgule]

a friend of mine really wants to use it in a case

i already told him that he should get a 290 because of the blowers since the 280x cards dont have blowers

 

ill try to let him  reconsider

 

 

 

thanks guys

References 290 could do, but in a case would require a big case intake fan. GB R9 280x OC in a case is a big NONO for me.

 

 

i wonder did u set the fans at 100% ?

 

 

Yes

 

 

how did they die ? burnt VRMs ?

My guess. Haven't disassembled the shroud, just sent them to Gigabyte over a month ago. I'm still waiting for them to ship them back.

[qwertywarrior]

 snip

gonna get a CM trooper and stick a delta fan at the side panel

i thnk that will be enough to cool a quad 290

 

thanks man !

[Virgule]

gonna get a CM trooper and stick a delta fan at the side panel

i thnk that will be enough to cool a quad 290

 

thanks man !

Be sure to give that case a GOOD amount of intake air flow (to cool down the case temperature) as well as a GOOD case positive pressure (to facilitate the work of the gpus' blower) because although these cards can climb high in temps, power and clocks will be down ramped in order to conserve an "acceptable" (still high, compared to tahiti) temperature. 

 

I would mount every case intake/outake with a fan if possible pushing the air IN. Also, I don't know the case very well but if you can mount a big fan (bigger than 140mm) to its side, that would be a plus. If you have openings on the bottom (in most cases these are unmountable openings with dust screens) that can't take fans, I would obstruct them.

 

So you would have something like :

- wide intake on side (flow optimized);

- intakes on top/front/bottom (pressure optimized);

- outake on back (gpus and cpu, if closed loop water cooler).

 

That would be a great gaming/mining machine. Finally, what PSU is going in there ?

[qwertywarrior]

Be sure to give that case a GOOD amount of intake air flow (to cool down the case temperature) as well as a GOOD case positive pressure (to facilitate the work of the gpus' blower) because although these cards can climb high in temps, power and clocks will be down ramped in order to conserve an "acceptable" (still high, compared to tahiti) temperature. 

 

I would mount every case intake/outake with a fan if possible pushing the air IN. Also, I don't know the case very well but if you can mount a big fan (bigger than 140mm) to its side, that would be a plus. If you have openings on the bottom (in most cases these are unmountable openings with dust screens) that can't take fans, I would obstruct them.

 

So you would have something like :

- wide intake on side (flow optimized);

- intakes on top/front/bottom (pressure optimized);

- outake on back (gpus and cpu, if closed loop water cooler).

 

That would be a great gaming/mining machine. Finally, what PSU is going in there ?

corsair 1200i ( its what he has from his previous build )

 

not sure if he would game on it ( 4GB of ram will be bought )

[Virgule]

corsair 1200i ( its what he has from his previous build )

That power supply's efficiency is 90% at full load, meaning it will output a maximum of approximately 1080 W (net power). I doubt this is enough. I would reserve 300W per GPU when mining in order for the card to reach their maximal output. This would mean having a net power of 1200W. That's also just for the GPUs. We are not considering the CPU/APU, the mobo, the fans, ...

 

I advise against building mining rigs in a case because, in most cases, you're going to need 2 psus.

 

 

not sure if he would game on it ( 4GB of ram will be bought )

If its not for gaming, then its another reason not to build it in a case, especially considering that case ain't cheap.

 

 

So to sum up :

- more wattage needed, probably 2 psus;

- better to use risers to make gaps between cards wider;

- need good air flow if in case

- if in case, need to facilitate gpus' outake by routing the airflow of the case in a certain way;

- don't do it in a case.

[ragedev]

From my experience, they do output a lot of heat even with Windforce coolers. My Gigabyte GTX 670 only goes to 70C and heats up the surrounding SSD/HDD rack quite a bit. I guess you need dual front fans to dissipate the heat

[jscho]

Yes but he's talking about mining which is nothing close to gaming in terms of usage. The former generates a ton more heat than the latter.

 

Why does mining make your card so hot? My DCUII 680 never hits 65c in burn tests and folding.

[Virgule]

Why does mining make your card so hot? My DCUII 680 never hits 65c in burn tests and folding.

Burn tests ad folding compare to mining. You were speaking of typical gaming SLI/crossfire though.

[jscho]

Burn tests ad folding compare to mining. You were speaking of typical gaming SLI/crossfire though.

 

People who buy quad SLI/crossfire setups tend to burn test their stuff. I know I would.

[RuecanOnRails]

People who buy quad SLI/crossfire setups tend to burn test their stuff. I know I would.

 

Mining is much more intense than folding or synthetic benchmarks it's as simple as that.

You will see much higher heat and watt output from mining when compared to other demanding work loads.

 

 

I would not advise a quad set up in a closed case without risers. It's possible with additional fans and highly efficient air flow/venting. You would still need to undervolt, and likely mine at a slower rate. With the addition to that, placing wedges between the cards to bend and separate is needed. Even with all that, I don't know if you could keep the side panel closed.

 

Here's an image of a quad gpu set up with wedges. You would have to modify the pci bracket on the case to allow for the mis-aligned GPU's. The wedges below, are fairly small compared to others I've seen.

 

 

[jscho]

Mining is much more intense than folding or synthetic benchmarks it's as simple as that.

You will see much higher heat and watt output from mining when compared to other demanding work loads.

 

Really? Wow  :wacko: I thought that 100% GPU usage meant 100% usage. Learn something new every day I guess :lol: