Sign in with
Sign up | Sign in
Your question

7770 with 350w psu

Last response: in Graphics & Displays
April 23, 2012 3:05:35 PM

Processor (CPU) AMD A6-3670K APU (2.7GHz, 4 Cores) & AMD Radeon™ HD 6530D Graphics
Motherboard ASUS® F1A55-M LE: FM1 A-SERIES, SATA 3.0GB/s, USB 2.0
Memory (RAM) 8GB SAMSUNG DUAL-DDR3 1333MHz (2 X 4GB)
Graphics Card Integrated AMD Radeon HD 6000 Series Graphics
Memory - 1st Hard Disk 2TB WD CAVIAR GREEN WD20EARS, SATA 3 Gb/s, 64MB
Memory Card Reader INTERNAL 52 IN 1 CARD READER (XD, MS, CF, SD, etc) + 1 x USB 2.0
Power Supply 350W Dual Rail PSU + 120mm Case Fan
Network Facilities 10/100/1000 GIGABIT LAN PORT - AS STANDARD ON ALL PCs

I am thinking about getting a amd radeon hd 7770

I have an FSP 350w (maximum wattage, not peak), will this be sufficient to power everything without cutting it dangerously close?

More about : 7770 350w psu

a c 161 U Graphics card
a b À AMD
April 23, 2012 3:13:53 PM

That power supply is cutting it close with that card, although in the benchmarks the total power with a 7770 is under 250. But that is actual power, not what the power supply is rated for. Unless you want to take a risk of cooking your system, upgrade to a 450 or greater. AMD suggests a 500 watt power supply for the 7770.

If this was my system, I would not try it without a better power supply.
April 23, 2012 4:06:14 PM

The power supply is rated for 350w sustained power, I think it's peak is 500W?
Related resources
a c 161 U Graphics card
a b À AMD
April 23, 2012 6:32:19 PM

davie412 said:
The power supply is rated for 350w sustained power, I think it's peak is 500W?

What is the brand and model of the PSU? You first said it's 350 max in both the spec listing and the post.
a b U Graphics card
April 23, 2012 6:44:53 PM

No No it won't^....

If you want stability and less rick. Listen to him and get a 450 or 500W... Because a 500W has a peak of 500 Watt. doesnt mean it will run 24/7 at 500Watt
a b U Graphics card
April 23, 2012 7:21:03 PM

Using this system:


MSI Big Bang XPower X58


Core i7 965 Extreme @ 3750 MHz

Graphics Card

Radeon HD 7750
Radeon HD 7770 GHz edition


6144 MB (3x 2048 MB) DDR3 Corsair @ 1500 MHz

Power Supply Unit

1200 Watt


Dell 3007WFP - up to 2560x1600

OS related software

Windows 7 64-bit SP1
DirectX 9/10/11 End User Runtime (latest available)
AMD Catalyst AMD_Cape_Verde_8.932.2 (11.12)
NVIDIA GeForce series latest WHQL 285.62 WHQL

The 7770 pulled 88watts, the whole system pulled 230 W !
Measured power consumption R7770

System in IDLE = 155W
System Wattage with GPU in FULL Stress = 231W
Difference (GPU load) = 76W
Add average IDLE wattage ~10W
Subjective obtained GPU power consumption = ~ 86 Watts

Your system uses considerably less power than an i7 965 Overclocked. Notice GPU load 76Watts.

From Guru3D

April 23, 2012 7:29:32 PM

is price the issue with the power supply?

why would u spend the money on all that and not get a quality PSU?

a c 161 U Graphics card
a b À AMD
April 23, 2012 7:56:39 PM

While technically the card will run if a 350 watt PSU runs as it should 100% of the time, if this was my system, I'd spend $50 on a more powerful PSU before I take a chance on killing the card and/or the motherboard/CPU. It may run just fine for the next 10 years, with overclocking, etc..., but I'm not going to say to get the card as is without pointing out the fact that it's cutting it close in power. There is a reason AMD lists 500 watts as the PSU for this board, they are adding in headroom. A 350 watt psu is taking too many chances. If it was a good 400 watt, eh.. should be OK, at 350, takes one hot day or a power sag to cause issues.
April 23, 2012 9:40:44 PM

FSP ATX-350PNR is my PSU.

350w is max wattage - This is the highest amount that the unit can supply stably to the components

~500w peak I think, give or take? certainly higher than the max anyway, don't think there is any way my build is gonna get anywhere near that anyway.

What I mean by this is that it's not a £10($20) psu where the manufacturer has slapped the peak wattage on it and sold it for a fraction of the price a maximum wattage corsair/fsp/seasonic etc. equivalent wattage has been rated as.

In answer to the 'why not just get a new PSU' - I only just got the PC couple months ago, with hindsight yeh, probably should have got a 450w, but it's a brand new PSU seems a waste to chuck it already, I will likely upgrade to a Corsair 500 or equivalent in ~1year, was just wanting to make sure I'm not at any risk of frying anything for when I install the card or for a good year or two after.
a c 161 U Graphics card
a b À AMD
April 23, 2012 10:10:17 PM

I don't know where you got the 500watt peak thing, the PSU is rated for 350, I have never seen a PSU list a "Stable average" in the name or ratings. It's always the max power rating. Which means that under good test conditions, the PSU put out 350. At home where it's hotter, the unit was used already for a while, it's safe to say it's putting out less. How much less, need to test it at full load with a meter.

But either way, if you want to try it, go ahead, it may work fine.
April 24, 2012 6:50:32 PM

Thanks for all your help everyone :) 

Here is an image of my PSU, I've been looking into this a lot and I think it's gonna run fine.

Should have probably taken this photo at the start of the thread but here is the photo anyway:

April 25, 2012 11:05:07 PM

GPU is in and up and running with no problems, so guess my PSU was up to the job. Thanks everyone, and will definitely not be overclocking or adding any more components without first upgrading the PSU.
a b U Graphics card
April 26, 2012 2:31:27 AM

Great News!!

Have Fun