Topic Title: 295 x2 PSU question
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Created On: 07/03/2014 01:24 PM
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 07/03/2014 01:24 PM
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pjayFlynn
Peon

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Hi

Recently bough a 295x2 as an upgrade form a 690 GTX.

I would like to know if my (oldish) PSU is up to the task

I believe the 295x2 needs two 8 pin connector to deliver 28a each, and a comined current of 50a.

Does my ABS Tagan BZ 1300w have enough to power them

Here are the specs I found online. No official pdf though ???

http://www.newegg.com/global/uk/Product/Product.aspx?Item=N82E16817814011R&cm_re=Tagan_BZ-_-17-814-011R-_-Product

http://www.hardocp.com/article/2008/12/03/tagan_bz_1300w_psu/2#.U7WRS_ldVAU

Am I right in thinking Ive only got 20a per 8 pin connector?

Once Ive illiminated this issue, I can go onto the next

 

 

 07/03/2014 02:44 PM
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backFireX64
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You need a combined current of 52A minimum and 800W to safely run the 295x2 card.

Your unit gives you a combined output of 80A on "turbo" mode.

I'd say, it's more than enough.



-------------------------

gigabyte X58A-UD3R rev.2, core i7 975 3.9ghz (stock voltage), windows 8.1 64-bit, corsair 12gb DDR3 1600mhz 7-7-7-20 RAM, sapphire HD 6990 (stock clocks), coolermaster ultimate 900w PSU.
amd catalyst 14.6 RC2 june23

 07/03/2014 02:51 PM
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pjayFlynn
Peon

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Thanks for the reply.

 

When I look at this link. It would seem I only have 20a per rail.

 

http://www.hardocp.com/article/2008/12/03/tagan_bz_1300w_psu/2#.U7WRS_ldVAU

Or am I getting something wrong and misunderstanding

 07/03/2014 03:10 PM
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Vegan
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Your PSU is an older model, I have come to appreciate the Corsair idea of a single monster rail which eliminates confusion over what will work.

read my page on power supplies, its the best on the internet

 

 



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 07/03/2014 03:13 PM
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pjayFlynn
Peon

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Thank you. I will have a read through that now.

Could you comment on whether you believe my PSU is an issue here? If you could take 5 minutes to look up ABS TAGAN BZ 1300, id appricate it

Im off to Scan tomorrow, so will pick up a new PSU, along with a new 4k monitor as Im swapping out the AOC (other story for another thread :/)

 07/03/2014 03:15 PM
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backFireX64
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I searched a little more and found that you need a dedicated current of 28A through each 8-pin pcie power connector and to maintain a combined ~52A total from both.



-------------------------

gigabyte X58A-UD3R rev.2, core i7 975 3.9ghz (stock voltage), windows 8.1 64-bit, corsair 12gb DDR3 1600mhz 7-7-7-20 RAM, sapphire HD 6990 (stock clocks), coolermaster ultimate 900w PSU.
amd catalyst 14.6 RC2 june23

 07/03/2014 03:18 PM
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pjayFlynn
Peon

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So my old Tagan BZ 1300W isnt up to the job?

 07/03/2014 03:28 PM
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backFireX64
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Well, the "turbo mode" combines the six +12 rails into a single rail for uninterrupted stability (a newegg article says).

Do you know anything about that ?



-------------------------

gigabyte X58A-UD3R rev.2, core i7 975 3.9ghz (stock voltage), windows 8.1 64-bit, corsair 12gb DDR3 1600mhz 7-7-7-20 RAM, sapphire HD 6990 (stock clocks), coolermaster ultimate 900w PSU.
amd catalyst 14.6 RC2 june23

 07/03/2014 03:37 PM
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pjayFlynn
Peon

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I dont. All I know is if I try and run anything at UHD, my PC restarts.

I believe my PSU has a max of 20A per rail, which isnt enough. 

I cant find a offical pdf on the PSU, so unsure what the "turbo" mode does.

 07/03/2014 03:45 PM
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backFireX64
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I think it is time for a better PSU mate.

Don't risk it with that beast dual-gpu card.



-------------------------

gigabyte X58A-UD3R rev.2, core i7 975 3.9ghz (stock voltage), windows 8.1 64-bit, corsair 12gb DDR3 1600mhz 7-7-7-20 RAM, sapphire HD 6990 (stock clocks), coolermaster ultimate 900w PSU.
amd catalyst 14.6 RC2 june23

 07/03/2014 03:52 PM
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pjayFlynn
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I think I will.

 

Off topic: I noticed you have the same mobo as me (Im rev 1). Do you feel any need to upgrade yet? Im toying with the idea of going i7 Haswell, but unsure whether I see much of a gain. 

 07/03/2014 03:59 PM
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backFireX64
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If i had the budget, i would probably upgrade all.

There are top mobo's out there that, when combined with a nice oc CPU and a fast RAM, they will give you up to 10-15 more frames with the same gpu !

Among other benefits of course.

Since you have a PCIE 3.1 supported dual-gpu card, i strongly advice to get a newer, better motherboard.

Remember, you should always built around the gpu potential if you are after max, or close to max, performance.

 



-------------------------

gigabyte X58A-UD3R rev.2, core i7 975 3.9ghz (stock voltage), windows 8.1 64-bit, corsair 12gb DDR3 1600mhz 7-7-7-20 RAM, sapphire HD 6990 (stock clocks), coolermaster ultimate 900w PSU.
amd catalyst 14.6 RC2 june23

 07/03/2014 04:32 PM
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pjayFlynn
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Tmorrow is going to be more expensive than I first thought

 07/03/2014 04:40 PM
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backFireX64
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Make it count buddy.

 

Do your homework.

Sleep early.

Pass the exams tomorrow.

Feel proud and happy.

 

Isn't like that always in life ?



-------------------------

gigabyte X58A-UD3R rev.2, core i7 975 3.9ghz (stock voltage), windows 8.1 64-bit, corsair 12gb DDR3 1600mhz 7-7-7-20 RAM, sapphire HD 6990 (stock clocks), coolermaster ultimate 900w PSU.
amd catalyst 14.6 RC2 june23

 07/03/2014 04:43 PM
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backFireX64
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One thing i've learned the hard way all these years with computer systems, is to never be cheap with the mobo and the PSU.

Never fails.

Just like with cars.

But that's another, off-topic, story ...........



-------------------------

gigabyte X58A-UD3R rev.2, core i7 975 3.9ghz (stock voltage), windows 8.1 64-bit, corsair 12gb DDR3 1600mhz 7-7-7-20 RAM, sapphire HD 6990 (stock clocks), coolermaster ultimate 900w PSU.
amd catalyst 14.6 RC2 june23

 07/03/2014 05:04 PM
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pjayFlynn
Peon

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Originally posted by: backFireX64 One thing i've learned the hard way all these years with computer systems, is to never be cheap with the mobo and the PSU.

 

Never fails.

 

Just like with cars.

 

But that's another, off-topic, story ...........

 

 

Dont talked to me about cars. Just had to sell my 2014 GTR

The only reason I bought myself the 295x2 was to cheer myself up.

Im going to treat myself tomorrow as well.

Haswell or Ivy?

 

 07/03/2014 05:11 PM
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backFireX64
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Haswell.

Or a really cheap ivy bridge.

Your choice.

 

NO !!!

Go with Haswell.



-------------------------

gigabyte X58A-UD3R rev.2, core i7 975 3.9ghz (stock voltage), windows 8.1 64-bit, corsair 12gb DDR3 1600mhz 7-7-7-20 RAM, sapphire HD 6990 (stock clocks), coolermaster ultimate 900w PSU.
amd catalyst 14.6 RC2 june23

 07/03/2014 05:30 PM
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backFireX64
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Mind that, even if ivy is an older socket, it runs cooler and consumes less power.

If you want a newer socket and that extra ~10% more performance though, and use a high efficient CPU liquid cooler setup, then by all means !



-------------------------

gigabyte X58A-UD3R rev.2, core i7 975 3.9ghz (stock voltage), windows 8.1 64-bit, corsair 12gb DDR3 1600mhz 7-7-7-20 RAM, sapphire HD 6990 (stock clocks), coolermaster ultimate 900w PSU.
amd catalyst 14.6 RC2 june23

 07/05/2014 08:20 AM
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pjayFlynn
Peon

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Quick update.

Bought the Corsair AX15000i, and swaped the AOC 4k monitor for the ASUS PB287Q. If anyone is thinking of saving themselve £100 and going with the AOC, you are making a mistake. The ASUS monitor is better in every respect

Everything up and running and all it good.

Going to wait on Haswell-E in spetember to upgrade the rest and go for a second 295x2

 07/05/2014 11:21 AM
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black_zion
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I'd rather spend more on the Dell UltraSharp 24" 4K monitor for £640 with 99% AdobeRGB gamut coverage and an IPS panel.

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ASUS Sabertooth 990FX/Gen3 R2, FX-8350 w/ Corsair H60, 8 GiB G.SKILL RipjawsX DDR3-2133, XFX HD 7970 Ghz, 512GB Vertex 4, 256GB Vector, 240GB Agility 3, Creative X-Fi Titanium w/ Creative Gigaworks S750, SeaSonic X750, HP ZR2440w, Win 7 Ultimate x64
AMD Support and Game » AMD Radeon™ Graphics » 295 x2 PSU question

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