Does the X1900XT really need a 22A +12v rail?

[aka1nas]

Hi all,
I just ordered a new board and an X1900XT and am a little curious. Does this card really need it's own 22A rail? I have an Antec NeoHE 550W, which has 3 18A rails. Will I be fine if I dedicate an entire 18A rail to the card?

 

[1Dark1Sharigan1]

No. The most the card may draw will probably be around 12A. The NeoHE is fine. I have the same PSU and I've been using it with my X1900XT @ 725/1674 without a hiccup . . . Power draw readings from the card sensors probably will tell you otherwise though, well those measurements are wrong.

 

[acegazda]

don't worry about it, they're talking about combined amps on all three in your case, your whole system won't draw much more than 22amps.

 

[jiffylube1024]

You are fine; typically they recommend ~22A as the combined voltage on the +12V rail. That PSU (Antec NeoHE 550W) is rated to an astounding 504W (42A!) combined on the +12V rail. This is peak draw, so the 42A figure is a bit high, but you are covered and then some!

As a matter of fact, the Antec NeoHE is certified for Crossfire, meaning you will have absolutely no problem running two X1900XT's side by side if you so choose...

 

[Boon72]

Hi All,

Im looking to get a X1900XT to replace my 6800GT, will my Tagan 480W have enough power ? it has 2x 6 pin video power rails.

 

[acegazda]

If that tagan has room for dual video cards, it should have enough room for 1 x1900xt. Is your tagan the TG-480-U01? If so it has 28amps on the 12v rail. Should be more than enough.

 

[mancunian]

Would a Thermaltake 560W with a crappy 22a on the 12v rail be enough?

Only 1 hard drive, 2 optical drives and a sound card in the system, and the PSU has been very stable with an overclock of 2.6Ghz on an A64 3200+, but would this card be too much for it?

My guess is that it might well be.

Grateful for any other opinions though....

 

[Cheex]

Look at my system specs in my signature and tell me if this PSU will solve my crashes.

Rosewill RD600-2DC-SL 600W Active PFC Power Supply SLI Ready

 

[sisq0kidd]

Originally posted by: Boon72
Hi All,

Im looking to get a X1900XT to replace my 6800GT, will my Tagan 480W have enough power ? it has 2x 6 pin video power rails.

Tagan makes very good power supplies, but it really depends how many amps are on the 12v. More than likely it has enough power.

Originally posted by: mancunian
Would a Thermaltake 560W with a crappy 22a on the 12v rail be enough?

Only 1 hard drive, 2 optical drives and a sound card in the system, and the PSU has been very stable with an overclock of 2.6Ghz on an A64 3200+, but would this card be too much for it?

My guess is that it might well be.

Grateful for any other opinions though....

Your system should be fine.

Best way to find out is test it and see if it has enough power

Originally posted by: Cheex
Look at my system specs in my signature and tell me if this PSU will solve my crashes.

Rosewill RD600-2DC-SL 600W Active PFC Power Supply SLI Ready

Will this psu solve your crashes? Maybe. If your crashes are due to fluctuating volts and/or not enough amps on your rails.

 

[Cheex]

Well...I just looked in the BIOS (because my system just crashed again)...

VCore fluctuates...its at 1.61 max and sometimes dips to 1.41.
My D915 cpu requires 1.2V i think. That's the first problem.

+12V also fluctuates...its at 11.677 max and sometimes dips to 11.416.

My crappy PSU that i got with the case i bought is 525W but pushes...
+12V1 = 14A
+12V2 = 15A

Bear in mind that I run an X850XT now.

The above mentioned PSU (Rosewill) carries 22A on both 12V rails. Reviews have said that it pushes as much as 12.13V on those rails.

What shall ye say then?

 

[mancunian]

@ sisq0kidd

Much appreciated for the reply.

I suppose I can give it a go then, was reluctant to but I suppose the worst that can maybe happen is that I'll have to back off with the overclock.

Thanks again.

 

[mcmikemc]

Ati Tool says I draw 30A when I am at load.

 

[CP5670]

I just ordered a new board and an X1900XT and am a little curious. Does this card really need it's own 22A rail? I have an Antec NeoHE 550W, which has 3 18A rails. Will I be fine if I dedicate an entire 18A rail to the card?

It should work fine. The power requirements you hear about are a bit overstated. I have an XTX and the entire computer uses only 232W on load (as measured by my UPS and with the PSU's efficiency factored in).

Ati Tool says I draw 30A when I am at load.

I think that's measured at 1.4V or whatever is actually fed into the GPU, not the load on the 12V rail.

 

[Capt Caveman]

My PSU is rated 17A and 16A on it's dual 12v rails. No issues with my X1900XTX

 

[sisq0kidd]

Originally posted by: Cheex
Well...I just looked in the BIOS (because my system just crashed again)...

VCore fluctuates...its at 1.61 max and sometimes dips to 1.41.
My D915 cpu requires 1.2V i think. That's the first problem.

+12V also fluctuates...its at 11.677 max and sometimes dips to 11.416.

My crappy PSU that i got with the case i bought is 525W but pushes...
+12V1 = 14A
+12V2 = 15A

Bear in mind that I run an X850XT now.

The above mentioned PSU (Rosewill) carries 22A on both 12V rails. Reviews have said that it pushes as much as 12.13V on those rails.

What shall ye say then?

The vcore fluctuation seems pretty bad to me. That's a 14% fluctuation when less than 5% is what's reccomended. And not only that, your cpu is suppose to run 1.2-1.3 stock.

Get rid of that psu immediately!

Your 12v seems a little low, but the fluctation isn't too bad.

Get a new psu.

 

[mancunian]

@ sisq0kidd

I suppose my current voltages would perhaps be a partial indicator as to whether I could power an X1900XT card, they are as follows:

cpu core = 1.47v
+3.3v = 3.39
+5v = 5.13v
+12v = 12.16-12.22v, this one fluctuates according to Everest.

Does this look promising?

I ask this because I've been hesitant to pull the trigger on a new card due to concerns about power.

Thanks in advance for any replies.

 

[Cheex]

Well...I am gonna get rid of it soon.
I thought this was a good buy but i want some opinions.
The black one has the same specs and cost aobut $8 more. My case is silver with blue LEDs. Clear side window...so this will fit in perfectly with the look of my rig.

This PSU is 600W and gives 22A on both the 12V1 and 12V2 rails.
Efficiency is rated as >80%.
It has Active PFC as well.

Take a look and let me know what you think.

Text Rosewill RD600-2DC-SL 600W Active PFC Power Supply SLI Ready

 

[jiffylube1024]

That Rosewill looks fine, but I'd personally stick to the big name brands: Antec, Enermax and OCZ (500W and up). They will give you excellent performance and should not let you down.

 

[aka1nas]

Even Antec might be questionable with certain boards.

 

[Cheex]

What about the reviews on it....do they look okay?
I'm kinda hooked on it already and i haven't even ordered it yet.

 

[jiffylube1024]

Originally posted by: aka1nas
Even Antec might be questionable with certain boards.

I'll give you that, especially since Antec has so many PSU lines. The NeoHE line, 500W and 550W in particular, look solid.

 

[aka1nas]

Originally posted by: jiffylube1024

Originally posted by: aka1nas
Even Antec might be questionable with certain boards.

I'll give you that, especially since Antec has so many PSU lines. The NeoHE line, 500W and 550W in particular, look solid.

Just avoid the NeoHe series with the A8N-SLI line of boards. Otherwise, I have had good luck with my NeoHE 550

 

[Dougzzt]

Hi everyone. I'm sorry to jump in here, but this thread seems to be what I've been looking for.
I have an Aspire (Apevia) ATX-AS500W power supply and I would really like to get a 1900XT. But I'm not sure if the PSU can handle it.

http://www.newegg.com/Product/Product.asp?Item=N82E16817148001
http://www.newegg.com/Product/ShowImage.asp?Image=17-148-001-27.JPG

Here are the PSU's specs:
===================================
DC OUTPUT +3.3V +5V +12V -12V -5V +5VSB
Max current 28A 30A 34A 0.8A 0.3A 2.0A
Normal current 20A 24A 25A 0.5A 0.5A 2.0A
+5V & 3.3V Combine 200W Max
+12V, +5V & +3.3V Combine 480W Max
Total Output Power 500W Max
===================================

So could someone plz tell me:
a) Can this PSU handle a 1900XT?
b) This PSU does not have a PCIe connector. So is there an adapter I can get?


This stuff is all very new to me.
Thanks for your time!

 

[Mawltar]

You all might be able to help me as I haveb een having some problems as well and I think it might be related to my PSU:

This is copied from my thread here
SO i ordered all new parts for my computer:

Click on the following for description:

ASUS X1900XT
Intel Pentium D 950 3.4ghz Dual Core
ASUS P5N32-SLI Deluxe
Hard Drive
OCZ Gold Series 2GB DDR2 DDR2 667 Dual Channel
Athena 520W PSU

So, I've got all these parts installed with the most current drivers. I've come a long way at least from many blue screen lock ups and freezes to not being able to boot.

but now, my problem is that i'm getting random restarts and some crashes to desktop (especially in 3D applications). I ran artifact scanner and didn't get any artifacts after running it for 45 minutes or so. I took out one of the ram modules and stil lgot the lock ups. I've yet to take out the other. I have tried ATI Drivers, Asus drivers, and Omega drivers. Ati seem to be the most stable. I've also updated the nvidia nforce drivers.


Any help would be greatly appreciated.

 

[sisq0kidd]

Originally posted by: mancunian
@ sisq0kidd

I suppose my current voltages would perhaps be a partial indicator as to whether I could power an X1900XT card, they are as follows:

cpu core = 1.47v
+3.3v = 3.39
+5v = 5.13v
+12v = 12.16-12.22v, this one fluctuates according to Everest.

Does this look promising?

I ask this because I've been hesitant to pull the trigger on a new card due to concerns about power.

Thanks in advance for any replies.

The fluctuations only tell you part of the whole picture in choosing whether or not to get rid of your power supply and get a new one.

Fluctations in voltages and whether or not the correct voltages are being applied concerns any video card you put in and not just the x1900xt itself.

Those voltages do look stable, but aside from that, you do want sufficient amps running on your 12v to supply the x1900xt with enough power.

Judging by your previous question about your thermaltake, I assume that's the power supply you're using and it should be fine.

Originally posted by: Dougzzt
Hi everyone. I'm sorry to jump in here, but this thread seems to be what I've been looking for.
I have an Aspire (Apevia) ATX-AS500W power supply and I would really like to get a 1900XT. But I'm not sure if the PSU can handle it.

http://www.newegg.com/Product/Product.asp?Item=N82E16817148001
http://www.newegg.com/Product/ShowImage.asp?Image=17-148-001-27.JPG

Here are the PSU's specs:
===================================
DC OUTPUT +3.3V +5V +12V -12V -5V +5VSB
Max current 28A 30A 34A 0.8A 0.3A 2.0A
Normal current 20A 24A 25A 0.5A 0.5A 2.0A
+5V & 3.3V Combine 200W Max
+12V, +5V & +3.3V Combine 480W Max
Total Output Power 500W Max
===================================

So could someone plz tell me:
a) Can this PSU handle a 1900XT?
b) This PSU does not have a PCIe connector. So is there an adapter I can get?


This stuff is all very new to me.
Thanks for your time!

a. That power supply should handle the x1900xt just fine.
b. It does not have a pci-e connector, but one of those should come with your video card.

I would advise getting a power supply that might cost a tad more with a good reputation and one with a built in pci-e connector.

That way, you'll save some time and money by not having to purchase a pci-e connector seperately if need be and lowering your chances of getting a bad psu.