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ATI 5870...after installation poor frame/computer reboot

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March 23, 2011 1:47:22 AM

Hello Everyone,

I recently bought a new ATI 5870 Radeon Card to replace my old 9400GT. However, after installation, I noticed that my computer was constantly rebooting (the whole computer was crashing) and I was also recieving lower framerates that I expected in some of my games. At first, I was stumped on what was causing this...but I think I have an idea of why my new graphics card is not preforming well.

First of all...here are my specs:

4GB DDR3 1333MHZ
1GB GDDR5 ATI Radeon HD5870
AMD Phenom II X4 2.8ghz
600W Extreme Cooling Power Supply
1TB SATA 3.0 HDD



I double checked the power I needed for my 5870 and it said 500W minimum....so that was fine as it is under 600W. I then checked the total minimum ampage required on the 12V lines...which was 40. Well, after searching my house for my retail power box, I found out that under the +12V1 and +12V2 DC outputs it says that it has a maximum output of 18A each. (Assuming A stands for Amps?) This would only bring out a maximum output of 36A, which is obviously less than the minimum required for the 5870.

Is this the problem to why my computer is constantly rebooting/crashing? I thought that it might of been a problem with the power supply if the entire computer was being affected...if it is the problem, does anyone know a decent graphics card under 36A that can run games pretty well? I was looking in to the 5770 which I believe needs only 450W and a total of 34A on the 12V lines...however I am not sure if this is the best card I can get for my PSU... and I do not want to really dish out any more money on another Power supply

Thank you!! :) 
March 23, 2011 1:49:13 AM

Arzgania said:
Hello Everyone,

I recently bought a new ATI 5870 Radeon Card to replace my old 9400GT. However, after installation, I noticed that my computer was constantly rebooting (the whole computer was crashing) and I was also recieving lower framerates that I expected in some of my games. At first, I was stumped on what was causing this...but I think I have an idea of why my new graphics card is not preforming well.

First of all...here are my specs:

4GB DDR3 1333MHZ
1GB GDDR5 ATI Radeon HD5870
AMD Phenom II X4 2.8ghz
600W Extreme Cooling Power Supply
1TB SATA 3.0 HDD



I double checked the power I needed for my 5870 and it said 500W minimum....so that was fine as it is under 600W. I then checked the total minimum ampage required on the 12V lines...which was 40. Well, after searching my house for my retail power box, I found out that under the +12V1 and +12V2 DC outputs it says that it has a maximum output of 18A each. (Assuming A stands for Amps?) This would only bring out a maximum output of 36A, which is obviously less than the minimum required for the 5870.

Is this the problem to why my computer is constantly rebooting/crashing? I thought that it might of been a problem with the power supply if the entire computer was being affected...if it is the problem, does anyone know a decent graphics card under 36A that can run games pretty well? I was looking in to the 5770 which I believe needs only 450W and a total of 34A on the 12V lines...however I am not sure if this is the best card I can get for my PSU... and I do not want to really dish out any more money on another Power supply

Thank you!! :) 



I did forget to mention that my PSU has an efficiency rate of 70%....if that will affect my choice on a graphics card...
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March 23, 2011 2:02:08 AM

Its a PSU problem. Do you know what brand *or even the exact name* your PSU is? So we can laugh at it.

What type of case do you have? If it is a standard ATX

This will work: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

SeaSonic S12II 620




If you get a cheap PSUs *Like the one you have 70% efficiency rate is very low* you will have problems from this to your computer going boom/catching on fire.


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March 23, 2011 2:05:29 AM

I think the brand is Cooler Master? Not sure but I thought it was crap...what sucks is that the guy who sold it to me at Frys said it was a great PSU.

However, I don't think I will be able to buy another PSU at this time. Will I be able to run a 5770? I think I should be able to handle that.

The casing is a ATX
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March 23, 2011 2:07:28 AM

Right-o about the 70% efficiency. However, everything has been running quite well before I put the new graphics card...I think I only crashed like once over a time frame of 1-2 years.
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March 23, 2011 2:15:24 AM

The "guy" at Frys lied becuase he probbaly got good commission on that item.
Bestbuy is normally who gets the hate for this but all electronic stores do it.

Although Cool master makes good cases their PSUs are mostly lackluster.


Your case is ATX tho right? Not Micro ATX or something stupid like that.

If it is a standard ATX *And accepcts ATX PSUs* you can go ahead and do one of two things.


Wait for others to respond and offer similar PSUS along the line of seasonic XFX and corsair



Or you can make sure your case is ATX and buy the one I listed *IF you live the the US atleast*

Seasonic is arguably the best PSU maker and they make PSUs for the other top brands.



Arzgania said:
Right-o about the 70% efficiency. However, everything has been running quite well before I put the new graphics card...I think I only crashed like once over a time frame of 1-2 years.



Thats because your PSU is really a 420w PSU and your old graphics card did not use more then the PSU could push out. *prob required 400w compared to your current 500w*
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March 23, 2011 2:37:53 AM

Alright well thank you all your help Randomcats :) 


casing is ATX
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March 23, 2011 2:40:07 AM

Hmm....but do you think I would be pushing it if I got a 5770? I know the minimum PSU says 450..and technically mine is 420 but I did a little more research and I keep seeing posts saying that the card only uses 330-360W on average...only 450 if pushed to maximum power.

My monitor is not a high resolution either...so I don't think I will need much power. (It's very old...only 1024 x 1280)
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March 23, 2011 2:45:42 AM

I am honestly not that much of a AMD guy so I don't know the break down and stuff for how much power it takes.

But I don't know why you would downgrade your graphics when it still has a chance that you will get the same problems.

Go ahead and wait if you want for another response but imo you should get the PSU if you made sure your case is ATX, if it is not ATX and you can tell me the type I can list you a slim PSU. *you do know how to install one right?*
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March 23, 2011 3:02:35 AM

Yes I know how to install it (I built the computer I posted above). the problem is money at the moment. I really only had enough to dish out a decent graphics card which was what I was primarily interested in... (total budget of around $200)

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March 23, 2011 4:56:33 AM

Can you return the PSU?
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March 23, 2011 5:16:54 AM

Hmm...I think there was a warranty when I bought it (about a year ago, last summer) for one- two years? I could BS that it was defective...but I don't know how that will turn out.
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a c 172 U Graphics card
March 23, 2011 6:02:32 AM

I agree that its a PSU issue. You can try contacting CM saying that your AMD card that says it needs 500W isn't powered by your 600W PSU and see if they can get you a different model. Might work, probably won't. (You can't add the 18s together like that. You need to find a statement on the PSU that says something like 12v1 + 12v2 not to exceed XXXW. Divide that number by 12 to find the real amperage rating.) A new PSU should fix your problem.

The 5770 needs very little power. I think its just over 100W. The 5870 doesn't need 300W either, its around 225W. When you are looking at load charts, most list the SYSTEM draw, not the card draw.
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March 23, 2011 11:28:34 PM

Ok so I just realized my power supply says Efficiency > 70% typically....better than what I thought it was. However...I am not seeing anything on the box that says 12V1 + 12V2 not to exceed some number....is there somewhere online I can find the amperage rate?
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a b U Graphics card
March 24, 2011 1:00:54 AM

Look up the particular Coolmaster you have on the net. I agree it is probably your PSU but did you also wipe your drivers before you installed it?
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March 24, 2011 1:10:56 AM

I looked up an equation to find the watt output in each 12V rail....W = VA. Apparently according to the 5770 I am interested in it draws about 100-150 Power from the rail...so with some basic math i would get 216 watts being able to be pulled out from my 12V rail which would seem to be enough

I did not find out however the amount the 12V1 and 12V2 could not exceed...?

I checked this online and they had the same result....
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March 24, 2011 1:12:32 AM

I uninstalled/wiped all drivers from my 9400 before I installed..but no go. I am pretty confident it was a power issue...because after some more research I found out that my PSU can only really extract about 450-480 with a net efficiency of like 73%....clearly lower than the 500 required for the 5870
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a c 172 U Graphics card
March 24, 2011 3:22:55 AM

I didn't say box.

Quote:
You need to find a statement on the PSU that says something like


Perhaps an example will help? Take a look at this pic, your looking for a statement like this.

http://www.newegg.com/Product/ImageGallery.aspx?CurImag...

Max load for this PSU is 276W, so 276W / 12V = 23A.

You should have enough power for the 5770, not for the 5870.
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a c 172 U Graphics card
March 24, 2011 4:50:17 AM

No, your not missing anything. Bad companies often won't list what their PSU is really capable of doing. If I ever see a PSU that doesn't list what the actual outputs are, or if it has that little red voltage select switch, I avoid them. You or someone else might be able to find a real review that might let you know what it can really do. I'd look it up, but I'm at work and don't have the time.
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March 24, 2011 4:51:57 AM

No problem, thank you for all your help however! Really, really appreciate it :) 
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April 3, 2011 6:32:55 PM

Best answer selected by Arzgania.
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