HD 5770 Power Requirements

[Bluecanoe]

Hi everyone,

In researching a new video card, I saw in another thread where someone recommended 20A on the 12v rail for the HD 5770. The box for my Seasonics 550W shows 18A on the 12v rail. Is my PSU sufficient to run this card? I will not be doing any heavy gaming.

Thanks.

Processor: Intel E6600 Core 2 Duo 2.4GHz
CPU Cooler: Arctic Cooling Freezer 7 Pro
Motherboard: Intel D975XBX2
Memory: 3G (1Gx2 + 512MB x 2) Crucial Ballistix DDR2 800 (PC2-6400) CL4
Video Card: Sapphire ATI Radeon X1950XT 256 MB
Power Supply: Seasonics S12 Energy 550W



Locking a necro thread.


Super Moderator BFG10K.

 

[Patrick Wolf]

Your PSU has four 12v rails at 18A each; not sure how that'll work out.

 

[edplayer]

it will work with your PSU

You have a combined 12V capacity of 41A

 

[Bluecanoe]

Thanks for your replies. I wasn't sure if the 20A recommended in the other thread was per rail or combined.

 

[Blastman]

A Core 2 E8600 (3.3Ghz) + RD 4850 system drew 13.3A (159.6watts) from the 12v while running both Furmark + Prime 95 together during a high stress scenario xbit.

A 5770 draws a little less power than a 4850, so 20A total on all 12v rails combined would be lots for a dual core system with that card. A quad core system would need about 20A minimum.

I'm building a i3-530 system this week with probably an 5770. I will be using an 8 year old Enermax 350w PSU that is rated 17A (probably very conservative) on the one 12v rail. I figure I will have power to spare.

 

[Jesusthewererabbit]

You'll be fine. I run mine on a Corsair 400w with an Athlon II 620, three hard drives, and a burner.

 

[Jhatfie]

Yeah your PSU should power it easy. MY HTPC in my sig with a 5770 OC'd is running happily on a 430W Rosewill Green Series PSU spending 24/7 encoding/gaming/watching movies, so you should have no problem on that 550W.

 

[Wayrest]

A Core 2 E8600 (3.3Ghz) + RD 4850 system drew 13.3A (159.6watts) from the 12v while running both Furmark + Prime 95 together during a high stress scenario xbit.

A 5770 draws a little less power than a 4850, so 20A total on all 12v rails combined would be lots for a dual core system with that card. A quad core system would need about 20A minimum.

I'm building a i3-530 system this week with probably an 5770. I will be using an 8 year old Enermax 350w PSU that is rated 17A (probably very conservative) on the one 12v rail. I figure I will have power to spare.

I'm seeing varying figures for HD 5770 power requirements, even that it can use 300-330W under full load, and no details from ATI. Here's my situation.

I've just ordered a Sapphire HD5770 512 Mb to put into the following system:

GeForce 6100PM-M2 v3 mobo
Athlon II X4 630 (quad core) CPU
Soundblaster Audigy LS PCI sound card
2 x 2Gb DDR2 800 RAM
2 x USB devices in addition to the mouse (router and external DVD drive)
2 x old non-SATA HDDs
1 x 40mm case fan
currently using a 7800 GTX (256 Mb) graphics card
and...here's the crunch...a CIT 450u (450 W) power supply.

The psu has dual 12v rails with a total of 23 amps (10+13). This gives a nominal total of 276W for 12v hardware. I intend to upgrade to a 'better-brand' psu (e.g. Antec or Corsair) but this won't be for a few months.

Will this cheap 450W (276W/23A for 12v supply) be OK for a few months with the HD5770 or should I not switch graphics cards until I get a better psu? I'll be playing games, putting load on the graphics card (e.g. Dragon Age, Lord of the Rings Online, maybe try Age of Conan) but only using DX9 (I'm still on Windows XP.)

I'll hate having a new graphics card sitting there in the box, but don't want to plug it in and risk the psu taking out some of my hardware.

Thanks for any feedback.

 

[Dark Shroud]

You'll be fine. I run mine on a Corsair 400w with an Athlon II 620, three hard drives, and a burner.

Just to be clear the 400watt Corsair has a 30amp 12v rail. Those things are monsters and the gold standard for entry level PSUs.

 

[Wayrest]

Just to be clear the 400watt Corsair has a 30amp 12v rail. Those things are monsters and the gold standard for entry level PSUs.

Interesting, thanks. I've been looking at 550W PSUs but I need the amps on the 12v rail more than the wattage. Maybe I could get away with a decent 450W. Figuring in 80% reliability to the 400W leaves me with 320W, which is cutting it fine for my system, though the 30 amps would be more than enough.

 

[cusideabelincoln]

http://www.techpowerup.com/reviews/Axle/Radeon_HD_5670/27.html

5770 approximately 85W under peak load

http://www.lostcircuits.com/mambo//...ask=view&id=70&Itemid=42&limit=1&limitstart=5

Athlon II 630 approximately 55W under full load.

That's 140W for the two biggest power draws in the system. Add 50-60W for the rest of the system, and you're below 200W under a full load. By the way, you won't really have a full load all the time while gaming (in most games) because a lot of games simply can't use all of your processor and the video card load will vary depending on what scene is being drawn.

So you should be fine, Wayrest. But I do suggest getting a quality power supply. 350W would really be enough for this system. No doubt just about any 550W should handle it. Corsair, Antec, Seasonic all make very good entry level power supplies.

 

[Wayrest]

http://www.techpowerup.com/reviews/Axle/Radeon_HD_5670/27.html

5770 approximately 85W under peak load

http://www.lostcircuits.com/mambo//...ask=view&id=70&Itemid=42&limit=1&limitstart=5

Athlon II 630 approximately 55W under full load.

That's 140W for the two biggest power draws in the system. Add 50-60W for the rest of the system, and you're below 200W under a full load. By the way, you won't really have a full load all the time while gaming (in most games) because a lot of games simply can't use all of your processor and the video card load will vary depending on what scene is being drawn.

So you should be fine, Wayrest. But I do suggest getting a quality power supply. 350W would really be enough for this system. No doubt just about any 550W should handle it. Corsair, Antec, Seasonic all make very good entry level power supplies.

Thanks for providing the links, I've seen wildly varying numbers since looking into this but all have been of the "I read somewhere..." type
I think I'll go for either a Corsair 400W CX or Antec BP550 Plus (for more future-proofing) depending on how much money I want to throw around when the time comes.

The most important thing, though, is that I'm NOT going to install the card until I get a new PSU, now. I will just sit and look at the box...and sigh......

 

[Termie]

Thanks for providing the links, I've seen wildly varying numbers since looking into this but all have been of the "I read somewhere..." type
I think I'll go for either a Corsair 400W CX or Antec BP550 Plus (for more future-proofing) depending on how much money I want to throw around when the time comes.

The most important thing, though, is that I'm NOT going to install the card until I get a new PSU, now. I will just sit and look at the box...and sigh......

The Corsair 400CX is EOL, so your only Corsair option might be their new CX430 model. Unfortunately, it looks like they've gone to a cheaper build and "pumped up" the watts for marketing purposes. It's 28amps instead of 30amps on the 12v rail: http://www.newegg.com/Product/Produc...82E16817139017

Just go for the Antec - it's cheaper than the CX430 and modular.

We all should have bought up dozens of those 400CX models before they were discontinued! I got one earlier this year before the discounts arrived.

 

[darkewaffle]

I was pretty bummed the other day when someone was asking about a build and I was going to start them off with the 400CX "oh yea this psu is perfect for you and inexpensive" and bam, it's gone

 

[Campy]

Assuming by reliability you mean efficiency. Otherwise disregard.

Interesting, thanks. I've been looking at 550W PSUs but I need the amps on the 12v rail more than the wattage. Maybe I could get away with a decent 450W. Figuring in 80% reliability to the 400W leaves me with 320W, which is cutting it fine for my system, though the 30 amps would be more than enough.

Unless I'm mistaken, the 400W is on the output side so your components can draw 400W. At 80% efficiency it's pulling 500W from the socket.

 

[Wayrest]

Yes, I did mean 80% efficiency. The importance of PSU's is new to me and what little I now know I got from a few hours Googling.

I bought a Corsair 400 CX. E-buyer.com have 370 in stock at the moment, £29.99 each and free 5-day delivery (though they have delivered in 2-3 days in the past.) - http://www.ebuyer.com/product/150985

This was only meant to be a cheap gaming PC while I put together a better one. I originally planned to put in a HD5670 but with the HD 5770 at only £112 (also from e-buyer), I couldn't resist.

This is a nice, helpful techie site and I'll keep it bookmarked :thumbsup:

 

[Termie]

Yes, I did mean 80% efficiency. The importance of PSU's is new to me and what little I now know I got from a few hours Googling.

I bought a Corsair 400 CX. E-buyer.com have 370 in stock at the moment, £29.99 each and free 5-day delivery (though they have delivered in 2-3 days in the past.) - http://www.ebuyer.com/product/150985

This was only meant to be a cheap gaming PC while I put together a better one. I originally planned to put in a HD5670 but with the HD 5770 at only £112 (also from e-buyer), I couldn't resist.

This is a nice, helpful techie site and I'll keep it bookmarked :thumbsup:

Great deal. Glad you could find one on the other side of the pond!

 

[RussianSensation]

The box for my Seasonics 550W shows 18A on the 12v rail. Is my PSU sufficient to run this card?

4 x 18A, for a maximum sustained 41A on 12V rail: http://www.newegg.com/Product/Produc...82E16817151027

This PSU will run a Core i7 860/870/920/930 @ 4.0ghz + GTX470 1GB without breaking a sweat.

IIRC, the Seasonic you have is very similar to the Corsair 520 I have. You can see what 41A can power Quality PSUs like Seasonic, Corsair, PC Power & Cooling are made to run at actual specs, no 90%, 80% or 70% of specs.

 

[ModestGamer]

I'm seeing varying figures for HD 5770 power requirements, even that it can use 300-330W under full load, and no details from ATI. Here's my situation.

I've just ordered a Sapphire HD5770 512 Mb to put into the following system:

GeForce 6100PM-M2 v3 mobo
Athlon II X4 630 (quad core) CPU
Soundblaster Audigy LS PCI sound card
2 x 2Gb DDR2 800 RAM
2 x USB devices in addition to the mouse (router and external DVD drive)
2 x old non-SATA HDDs
1 x 40mm case fan
currently using a 7800 GTX (256 Mb) graphics card
and...here's the crunch...a CIT 450u (450 W) power supply.

The psu has dual 12v rails with a total of 23 amps (10+13). This gives a nominal total of 276W for 12v hardware. I intend to upgrade to a 'better-brand' psu (e.g. Antec or Corsair) but this won't be for a few months.

Will this cheap 450W (276W/23A for 12v supply) be OK for a few months with the HD5770 or should I not switch graphics cards until I get a better psu? I'll be playing games, putting load on the graphics card (e.g. Dragon Age, Lord of the Rings Online, maybe try Age of Conan) but only using DX9 (I'm still on Windows XP.)

I'll hate having a new graphics card sitting there in the box, but don't want to plug it in and risk the psu taking out some of my hardware.

Thanks for any feedback.

When I forceably massively overclocked my 5770 it used nearly 300w. Pumping up both voltage and maxing out processor and ram speed pushed way beyond catalyst settings.. with max CCC clocks at high durations it pulled 200-225w peak after a hour or so of gaming and when cold it pulls mid 170w type draws at full load if your gaming for less then 60 minutes. As tempautres went up over time it started drawing more current. Typically BTW of silicon devices.

I verified this with a amp probe twice.

Your mileage may vary and I declocked and put stock cooling back on. I just didn't need the extra performance right now. But it was fun to tinker.

idle consumption was always good unless way overclocked. 18-20w idle and with stock settings it peaked for power useage around 150w or so. Using the catalyst panel you can push consumption up. to just over 200w.

I really don't care what people have published. this is with a refrence card design hd5770 that I have in my hand and use dialy.

Get a big power supply and a good one.If you plan to run the card at stock settings 550w Ps will be plenty. If you plan to overclock and overvoltage get a big power supply.

 

[toyota]

there is no way in hell your 5770 by it self pulled 300 watts. entire system maybe but not just your card.

 

[ModestGamer]

there is no way in hell your 5770 by it self pulled 300 watts. entire system maybe but not just your card.

I am not going into details but you can push the card that far on overclock. But you better know what your doing and thats why I am being very vague about it. Yes it can and yes you could. Some of it was hardware modding on the card itself to increasevoltage and some of it was software tricks to increase speeds.

I wouldn't recomend it though. I have 2 power supplys in my system. 1 for the video card and one for the CPU etc. Its a older dell server case with multip power supplys and custom wiring.

Yes it can and I am not going to even begin to tell other how to do it. But it can and has and that was checking with a actuall amperage meter.

 

[toyota]

I am not going into details but you can push the card that far on overclock. But you better know what your doing and thats why I am being very vague about it. Yes it can and yes you could. Some of it was hardware modding on the card itself to increasevoltage and some of it was software tricks to increase speeds.

I wouldn't recomend it though. I have 2 power supplys in my system. 1 for the video card and one for the CPU etc. Its a older dell server case with multip power supplys and custom wiring.

Yes it can and I am not going to even begin to tell other how to do it. But it can and has and that was checking with a actuall amperage meter.

yeah but you are also claiming that it pulled 150 watts even with completely stock settings and 200 watts with just an oc from CCC. I don't see how that is possible. I have an old 65nm gtx260 that's way more power hungry than your 5770 and even with my gpu at 700/1465/2200(22% oc) and E8500 at 3.8 my ENTIRE system only pulls just over 250 watts at the wall in Furmark.

 

[jacktesterson]

Look at my setup below.

I have 34 amps on two 12v rails total for 360 watts on my Seasonic and have no issues.

 

[jacktesterson]

Just to be clear the 400watt Corsair has a 30amp 12v rail. Those things are monsters and the gold standard for entry level PSUs.

Not quite as good as the 400w Seasonic SS400-ET with is 34 amps on 12v rail for under $50

 

[Rifter]

Not quite as good as the 400w Seasonic SS400-ET with is 34 amps on 12v rail for under $50

This is true, that seasonic is a nice unit. But you can get the corsair for $30 after rebate, at least i did 6 months ago.