295x on a Corsair TX750

[blacktruckryder]

Quick question, do you guys think a Corsair tx750 PSU could handle a 295x just to make sure the card works? I have a chance to pick one up for cheap and would like to test it out first.

 

[Sasqui]

Power consumption max at 646w: http://www.techpowerup.com/reviews/AMD/R9_295_X2/22.html

In short, probably not a good idea!

 

[Tatty_Two]

I suppose to check if it just works as in a video signal putting a picture on your monitor then just put the CPU at stock and start her up, if you wanted to really be safer you can disable some cores on your CPU if your board allows it..... you would lower the consumption a bit.

 

[64K]

Power consumption max at 646w: http://www.techpowerup.com/reviews/AMD/R9_295_X2/22.html

In short, probably not a good idea!

Yes but that was running Furmark. Furmark isn't relevant to any real world gaming situation. It's a torture test. The "Peak Consumption" for the card is 500 watts so the 750 watt PSU is probably enough but it's cutting it closer than I would like. Just don't overclock anything. I'm not familiar with that CPU though. How power hungry is it?

 

[blacktruckryder]

Its a 125w tdp CPU.

 

[brandonwh64]

While yes it possibly could run up to over 600W with brutal testing, I do not think it would over load the PSU as long as other pieces of hardware that you have are calculated in as well. I still have my 750TX and at one point I was running 3 6950's OCed in Xfire and it did pretty good. I say this, just for piece of mind and further expansion I would pickup a new PSU since they have really changed in the last couple of years in terms of ratings.

 

[Cybrnook2002]

Would suggest at least 1k psu. Also make sure to adhere to the 27 amp per line requirement for that card.

EDIT: But if you just want to make sure it powers up, 750 should be fine. For daily driving you will want a little more juice (watts and amps). It's a hungry card....

Let me know when your ready to upgrade, I got a Corsair AX1200i, RM1000, and RM850 needing new homes.

 

[ranxzy]

Just signed up to say that I've gotta six year old Corsair TX750w PSU with a 295x2, i7 2700k at stock, two HDDs + SSD and I've had no problems in games so far. The TX750 is capable of being overloaded to 900w FYI but obviously a 295x2 system wouldn't be getting to that and noise levels on the +12 output go over 100mV

http://www.hardwaresecrets.com/article/corsair-tx750w-power-supply-review/505/8

 

[RCoon]

Luckily the TX750 V2 is the Sea Sonic one, and not the ass sucking V1 made by Chicony. At peak the 295X2 is going to pull 500W's, and the processor ~150W's. You're well within specs, even when taking into account MoBo, RAM, HDD power etc, you're below the 744W specification. I wouldn't overclock on that setup, but it will run perfectly fine at stock.

 

[blacktruckryder]

Yeah I just want to make sure it powers up and runs ok. I plan on upgrading the psu if I keep the 295x.

I made sure I got the v2 when I bought the psu.

Cybrnook2002 shoot me a pm with some prices!

 

[Cybrnook2002]

Just signed up to say that I've gotta six year old Corsair TX750w PSU with a 295x2, i7 2700k at stock, two HDDs + SSD and I've had no problems in games so far. The TX750 is capable of being overloaded to 900w FYI but obviously a 295x2 system wouldn't be getting to that and noise levels on the +12 output go over 100mV

http://www.hardwaresecrets.com/article/corsair-tx750w-power-supply-review/505/8

Thanks Ranxzy for the real word experience. While it likely can work without issue, it is still recommended to have a slightly larger PSU. (I got two of these bad boys in my system)

I checked the spec's on the TX750 and while it technically can work, you are very close for everything else. If the PSU was dedicated to just the GPU, then sure all day long. But the PSU has a 60 amp single rail (up to 720 watts), and at peaks the 295x2 can pull up to 27 amps per cable ( x 2) so a total of 54 amps, leaving 6 for the rest of your system. Also keep in mind that the harder you push your PSU, the warmer it will get, the warmer it gets the less efficient it is. And as this is a bronze certified PSU, you are guaranteed at least %82 efficiency, so you are already in the negative if something sips that straw a little harder.

 

[RCoon]

60 amp single rail (up to 720 watts)

62 amps, 744watts

keep in mind that the harder you push your PSU, the warmer it will get, the warmer it gets the less efficient it is.

If you're buying a 295X2, I don't think you care much about efficiency

 

[64K]

Thanks Ranxzy for the real word experience. While it likely can work without issue, it is still recommended to have a slightly larger PSU. (I got two of these bad boys in my system)

I checked the spec's on the TX750 and while it technically can work, you are very close for everything else. If the PSU was dedicated to just the GPU, then sure all day long. But the PSU has a 60 amp single rail (up to 720 watts), and at peaks the 295x2 can pull up to 27 amps per cable ( x 2) so a total of 54 amps, leaving 6 for the rest of your system. Also keep in mind that the harder you push your PSU, the warmer it will get, the warmer it gets the less efficient it is. And as this is a bronze certified PSU, you are guaranteed at least %82 efficiency, so you are already in the negative if something sips that straw a little harder.

The PSU will still supply the 750 watts. The efficiency rating of 82% just means that it will draw more watts from the outlet than 750 watts. In this case it would draw 915 watts from the outlet to provide 750 watts from the PSU. Some of the watts get wasted as heat.

 

[Cybrnook2002]

62 amps, 744watts



If you're buying a 295X2, I don't think you care much about efficiency

PotAto PAtato Newegg specs must be a little off. My point is just make sure to always understand that even if the PSU says 750, you are likely never to get a sustained 750 out of it unless you are at a %100 efficiency.

Again, it will work I am sure. Press the power button and the PC will boot up, fire up a game and it will probably run. But when summer rolls around, and temps get up, and your gaming for an hour or two and maybe have some torrents running in the background and maybe some music going, don't be surprised to see a "Display driver stopped responding and recovered"

And you got that right on the efficiency part. But to counter my own argument on the power draw, how many of use are ever running our systems at %100 load capacity anyways. So max theoretical pull is unlikely. (but still a calculated risk)

EDIT:

AND AND AND I am countering myself again, reading your specs. If your gaming on a 42" TV the card is overkill. Gaming on a TV is lame as you are capped at 60hz and lag is terrible (not to mention TV post picture processing, think its called interpolation for artificial 120hz +). So you will likely never be running more than 1 GPU of this card if you buy it. (with v-sync enabled, which you would want)

 

[64K]

PotAto PAtato Newegg specs must be a little off. My point is just make sure to always understand that even if the PSU says 750, you are likely never to get a sustained 750 out of it unless you are at a %100 efficiency.

Again, it will work I am sure. Press the power button and the PC will boot up, fire up a game and it will probably run. But when summer rolls around, and temps get up, and your gaming for an hour or two and maybe have some torrents running in the background and maybe some music going, don't be surprised to see a "Display driver stopped responding and recovered"

And you got that right on the efficiency part. But to counter my own argument on the power draw, how many of use are ever running our systems at %100 load capacity anyways. So max theoretical pull is unlikely. (but still a calculated risk)

EDIT:

AND AND AND I am countering myself again, reading your specs. If your gaming on a 42" TV the card is overkill. Gaming on a TV is lame as you are capped at 60hz and lag is terrible (not to mention TV post picture processing, think its called interpolation for artificial 120hz). So you will likely never be running more than 1 GPU of this card if you buy it. (with v-sync enabled, which you would want)

You can get 750 watts from the PSU. It will just pull 915 watts from the outlet at 82% efficiency. I don't think we will ever get a 100% efficient PSU as some watts will always be wasted as heat. Even the highest rating, Titanium, only gets 90% at full load.

Here's a post that explains it very nicely imo

http://www.techpowerup.com/forums/t...lly-need-an-80-plus-gold-power-supply.129456/

 

[Cybrnook2002]

You can get 750 watts from the PSU. It will just pull 915 watts from the outlet at 82% efficiency. I don't think we will ever get a 100% efficient PSU as some watts will always be wasted as heat. Even the highest rating, Titanium, only gets 90% at full load.

Here's a post that explains it very nicely imo

http://www.techpowerup.com/forums/t...lly-need-an-80-plus-gold-power-supply.129456/

Nice article

I still think 750 is riding the wire though for your entire system.

 

[RejZoR]

PSU's usually have the highest efficiency at around 50% load. So, when deciding for one, figure out at which load the system will be most of the time. If your system will need 500W to operate majority of time, buy a 900-1000W PSU. This way, it will be within the highest efficiency "band" the most.

If your system will be idling most of the time at lets say 200W, but requires 450W here and there, buying a 500W PSU makes the most sense. And so on and on. It's a rather simple thing. You can also see reviews where they usually draw the efficiency line and you can clearly see at what load it has the highest efficiency.

 

[BiggieShady]

... aand if you don't want to hammer your PSU with constant 600W while gaming, cap your frame rates

 

[Cybrnook2002]

... aand if you don't want to hammer your PSU with constant 600W while gaming, cap your frame rates

AND AND AND I am countering myself again, reading your specs. If your gaming on a 42" TV the card is overkill. Gaming on a TV is lame as you are capped at 60hz and lag is terrible (not to mention TV post picture processing, think its called interpolation for artificial 120hz +). So you will likely never be running more than 1 GPU of this card if you buy it. (with v-sync enabled, which you would want)

Yes

 

[Schmuckley]

RCoon said it all.
Just don't OC and you'll be OK.
If you really wanted to be extra-safe you could underclock/undervolt your CPU.

 

[blacktruckryder]

Thanks for all the input guys! I've got a 1000w PSU on the way. Thank you cybrnook2002!

I'll test the card with my current PSU and we'll see what happens.

 

[blacktruckryder]

A little update. I tried the card on my tx750 and on a rm1000. The 295x crashed on both. I figured the price was too good to be true. So long story short, I didn't buy the card.