Title: Are the CPU, Memory and Power Supply on this rig good enough for 3 x HD 5970? Post by: NISMOkwim on June 23, 2011, 10:49:00 PM AMD's website it calls for at least 1GB RAM to run the Radeon HD 5970, but since I am going to be running 3 of them, won't I need more than 1GB RAM? Will I need a better CPU?
Also, AMD calls for at least a 650Watt power supply, and calls for a 850Watt power supply if you plan to use ATI CrossFireX™ technology in dual mode. Here's the System Requirements from their website: (http://tinyurl.com/27vndvz)
Here is what I have in the setup currently:
I'm concerned that the RAM/CPU aren't enough to handle 3 of the Radeon HD 5970's. And that they might need a bigger power supply. What do you guys think? Title: Re: Are the CPU, Memory and Power Supply on this rig good enough for 3 x HD 5970? Post by: Etienne on June 23, 2011, 10:55:27 PM I just finished setting up 2 systems with 2 5970 each.
It ended up being cheaper than getting a mobo for 4 cards! So I end up having a resilient mining set up with cheaper cpu's and stable performance. I didn't overclock the cards much, just 825 mhz GPU / 1200mhz RAM. Good luck Title: Re: Are the CPU, Memory and Power Supply on this rig good enough for 3 x HD 5970? Post by: fabianhjr on June 23, 2011, 11:01:27 PM Power supply won't be enough you need at least 1KW and a 1.2KW is recommendable. :/
Each card pulls a max of 300 watts for a total of 900 and you are still missing CPU, HDDs/SDDs, Optical Drives, USB Devices, Memory, and cooling(fans). Title: Re: Are the CPU, Memory and Power Supply on this rig good enough for 3 x HD 5970? Post by: NISMOkwim on June 23, 2011, 11:09:44 PM I just finished setting up 2 systems with 2 5970 each. It ended up being cheaper than getting a mobo for 4 cards! So I end up having a resilient mining set up with cheaper cpu's and stable performance. I didn't overclock the cards much, just 825 mhz GPU / 1200mhz RAM. Good luck Etienne: Do you mind if ask what all is in your setup? I was looking at 3 systems running 3 x 5770's a piece, but at that point it seems easier to just bump up a card to the 5970 lol Power supply won't be enough you need at least 1KW and a 1.2KW is recommendable. :/ Each card pulls a max of 300 watts for a total of 900 and you are still missing CPU, HDDs/SDDs, Optical Drives, USB Devices, Memory, and cooling(fans). fabianhjr: Thanks man!!!! I've been looking for that sort of an answer haha If I was running the dual setup with only 2 cards each, do you think at 850? or even 750 would work? Title: Re: Are the CPU, Memory and Power Supply on this rig good enough for 3 x HD 5970? Post by: Bobnova on June 23, 2011, 11:13:26 PM As a sidenote: Avoid Apevia power supplies across the board regardless. They're well known for exploding and killing off everything connected to them.
If you want to be damn sure of getting a good power supply, Corsair doesn't make a single bad unit, and the top level Antec units are very good as well. Other than those two companies, it's a good idea to google both the PSU manufacturer and the model itself and find a review, ideally a review at jonnyguru.com as they do a very, very good job of testing there. Failing that, find someone else who did actual load tests, not just a plug it into some parts and check voltage output "load test". If you're thinking about overclocking the 5970s you'll need over 300w per card, I would get a 1200w minimum. Keep in mind that a fully loaded 1200w power supply will be drawing 1300w or more from the wall, you'll probably want a dedicated circuit for that computer as most house circuits are only capable of 1500-1800w. Title: Re: Are the CPU, Memory and Power Supply on this rig good enough for 3 x HD 5970? Post by: NISMOkwim on June 23, 2011, 11:17:17 PM As a sidenote: Avoid Apevia power supplies across the board regardless. They're well known for exploding and killing off everything connected to them. If you want to be damn sure of getting a good power supply, Corsair doesn't make a single bad unit, and the top level Antec units are very good as well. Other than those two companies, it's a good idea to google both the PSU manufacturer and the model itself and find a review, ideally a review at jonnyguru.com as they do a very, very good job of testing there. Failing that, find someone else who did actual load tests, not just a plug it into some parts and check voltage output "load test". If you're thinking about overclocking the 5970s you'll need over 300w per card, I would get a 1200w minimum. Keep in mind that a fully loaded 1200w power supply will be drawing 1300w or more from the wall, you'll probably want a dedicated circuit for that computer as most house circuits are only capable of 1500-1800w. Thanks for the heads up on Apevia. I really like the Corsair models as well... I'll stick with those I think. As for wattage, if I wasn't overclocking, do you think a 1200Watt would be safe? And can you recommend a place to pickup a dedicated circuit? Title: Re: Are the CPU, Memory and Power Supply on this rig good enough for 3 x HD 5970? Post by: Bobnova on June 24, 2011, 12:14:59 AM If you aren't overclocking a 1200w (quality) psu is plenty, you'll probably use around 1kw of it, leaving 200 to spare, which is generally a good idea.
A dedicated circuit means a circuit in your house/apartment/whatever that doesn't have anything else plugged into it. If you aren't overclocking just make sure that you don't use that same circuit for a microwave or hair dryer or other high wattage appliance and you'll be fine. Title: Re: Are the CPU, Memory and Power Supply on this rig good enough for 3 x HD 5970? Post by: bal3wolf on June 24, 2011, 03:46:46 AM a good 1200 watt but you will probly need to find a way to handle the heat also thats going to be a ton of heat coming from 3 5970s unless your watercooling them.
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