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Thread: Going into Retirement! |
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Thread Status: Active Total posts in this thread: 57
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twilyth
Master Cruncher US Joined: Mar 30, 2007 Post Count: 2130 Status: Offline Project Badges: 
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I hate to sound cynical - I am cynical of course, just don't want to sound it - but are you sure they're not jerking your around. Whl had mentioned earlier that your machine probably has a 300w PSU but the AMD web site says the system req. for that card is min. 500w.
----------------------------------------The whole business about needing special cables sounds like bs to me. Those things are pretty much industry standard and there's no reason at all they they should need to get them from China even if they plan to crack open the PSU and solder them in by hand. If worse comes to worse though, replacing the PSU isn't that big of a deal and shouldn't be too expensive even for a good unit in the 500-600w range.   [Edit 1 times, last edit by twilyth at Aug 24, 2013 6:10:20 AM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I mentioned to the 'tech' about the 500w requirement and he assured me that the fitted one was adequate......however I also told him that if it blew the cost was entirely down to them.
As far as the power cable for the HD7770 goes, I saw that the PSU end of the cable was not compatible with the 'new' type of PSU connector in the HP Pavillion, so that part was not BS, and the main PC World warehouse does not stock them as they are too new! |
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twilyth
Master Cruncher US Joined: Mar 30, 2007 Post Count: 2130 Status: Offline Project Badges:
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OK, but I thought the problem was that you needed a connector for the HD7770. I guess I'm not following, sorry.
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
The HD7770 requires a separate connection for power, it will not take it thro' the edge connector as it requires too much. The supplied cable in the box connects to the 'old' large white type of power connector that you plug into disc drives etc, the 'new' type of PSU has a different smaller connector....
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twilyth
Master Cruncher US Joined: Mar 30, 2007 Post Count: 2130 Status: Offline Project Badges:
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Normally those connectors are part of the power supply - hence my skepticism. The only exception is with modular PSU's where you have cable that plug into the PSU. But you're not likely to see that on pre-built machines.
----------------------------------------So I don't understand what kind of adapter it is that they're going to get for you. You need a PCI-E molex cable. I don't think you can just use one of the other leads from the PSU with an adapter for the video card but IDK. I've never heard of that. Is that what the plan is? |
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twilyth
Master Cruncher US Joined: Mar 30, 2007 Post Count: 2130 Status: Offline Project Badges:
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OK, looks like that is in fact an option. Huh, learn something every day. Did a search on PCI-E molex and found these images . These are mostly the old style 4 pin power cables but I'm guessing they also have the newer kind as well. One example
---------------------------------------- [Edit 1 times, last edit by twilyth at Aug 24, 2013 7:03:50 AM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I mentioned to the 'tech' about the 500w requirement and he assured me that the fitted one was adequate......however I also told him that if it blew the cost was entirely down to them. The PSU won't blow; the GPU or some other random part of the system just won't work correctly when the GPU draws lots of power and stresses the PSU. Think of this if you get BSODs or your WCG tasks give errors or invalids  . It'll be much more difficult to persuade them it's their fault in that situation. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Yup, confusing ain't it
 Not sure which was in the HD7770 box as he waived it about a bit, but there was a small connector one end that plugged into the card, and a much larger one on the other end that seemed similar to the one at the left end of your photo, which I remember from my days when I built/repaired my own boxes. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I mentioned to the 'tech' about the 500w requirement and he assured me that the fitted one was adequate......however I also told him that if it blew the cost was entirely down to them. The PSU won't blow; the GPU or some other random part of the system just won't work correctly when the GPU draws lots of power and stresses the PSU. Think of this if you get BSODs or your WCG tasks give errors or invalids . It'll be much more difficult to persuade them it's their fault in that situation.Thanks Tony, I will bear that in mind, but in any case whatever the symptoms they will have to fix it and I will give them all the info, including the AMD site recommendation for 500w. |
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twilyth
Master Cruncher US Joined: Mar 30, 2007 Post Count: 2130 Status: Offline Project Badges:
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I mentioned to the 'tech' about the 500w requirement and he assured me that the fitted one was adequate......however I also told him that if it blew the cost was entirely down to them. The PSU won't blow; the GPU or some other random part of the system just won't work correctly when the GPU draws lots of power and stresses the PSU. Think of this if you get BSODs or your WCG tasks give errors or invalids . It'll be much more difficult to persuade them it's their fault in that situation.I think Scribe will actually be worse off if it does work. If the PSU is underpowered, running over it's rated capacity is, from what I understand, likely to dramatically shorten it's life. I've also heard that to get the best efficiency from a PSU you need to run it at somewhere around 2/3 to 3/4 of capacity. Not sure if that's true but I know that when building rigs people generally leave a good amount of headroom on their PSU's. [Edit 1 times, last edit by twilyth at Aug 24, 2013 7:51:37 AM] |
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