After a couple hours of screwing around with this, I figured I should get a second opinion.
I am trying to upgrade the video card in my desktop (Shuttle SZ87R6, an xpc-type device, I've had a lot of these boxes over the years so I'm pretty used to the various constraints they have). It has a 500W 80+ Silver power supply in it, but there are no more options to upgrade past that. The PC is about 2 years old, it's a Haswell i7 4770K @ 3.5GHz, 84W TDP (I never got around to heavily overclocking this, even though it should be quite feasible). 2 of the 4 DIMMs in use, mSATA SSD boot drive, 1 HDD, 1 DVD. I use dual monitors via DVIs.
Current card is a 4-ish year old EVGA Nvidia GTX460 SC that I pulled from the previous desktop and put into this box when I got it, it's been working fine for 2 years, but is now the noticeably oldest component in the system, so I bought a new card when it went on sale @ Newegg this week. My understanding is that the GX460 requires about 160W, same as the new card, an EVGA NVidia GTX960 SC (short-length card for Mini-ITX use, it is actually even shorter than the GTX460, so it fits comfortably in the case).
First thing I did was update the NVidia drivers to newest, expecting this to be a 15min swap job. Then power everything down and take the case apart, pull the old card out. I put the new card in, and powered the box on. I got the "Please power down and connect the PCIe power cables for this graphics card" message, and then the GPU fan spun down. I of course, had plugged in the connector before powering on. So, I re-seated the new card, and re-seated the power connector and tried again, same thing. Hmm...
The GTX460 had 2x 6-pin aux connectors. Interesting thing about this PSU is it only has one PCIe aux power pigtail, with the typical 6/6+2 daisy-chained on the same leads. I was apparently brain-dead when I put this card in 2 years ago because I plugged both connectors from the same pigtail into the double connectors on the old card (which really shouldn't work, but it does). Reminder: this system has been fine for 2 years, so something was working there. The GTX960 has only 1x 6-pin aux connector, so I had connected that to the one aux power connector (as one would expect).
Stuff I did:
I tried updating the BIOS on the machine, same message on boot.
I tried using the double 4-pin Molex to PCI aux connector adapter instead, to see if one of the other pigtails from the PSU was better (note, it doesn't have molex on 2 pigtails so it's really only pulling from one rail). Same message on boot.
I tried disconnecting the HDD + DVDs (since I only need the SSD to boot and thought maybe I was on the edge of current limits). Same message on boot.
I measured the voltage on the pins of the 6-pin PCI aux connector with a multimeter, this is the part that bothers me, they all read around 5V (instead of 12V). However, with no load, maybe that's normal?
The PSU is a Shuttle PC63J: the one I have is 80+ Silver (that one is Bronze). On the label of the PS, the 12V rails are labelled as +12V1 - 16A, +12V2 - 16A, +12V3 - 17A, totalling 49A. The card needs something like 29A, according to this, no idea how accurate it is. The Shuttle power calculator suggests I am around 315W out of the 500W budget, should have a lot of headroom.
With the old card in, I tried booting without the aux connectors attached to it. The box won't boot (but doesn't give the same message as the new card). Once I connect the aux connectors to the old card, everything boots fine, which is how I'm typing this post now - system completely reverted to how it was, me scratching my head.
Next move is to go to my friend's house and try the new card in his PC to see if there's something wrong with it.
Anything else that I should try that I've forgotten to do?
I am trying to upgrade the video card in my desktop (Shuttle SZ87R6, an xpc-type device, I've had a lot of these boxes over the years so I'm pretty used to the various constraints they have). It has a 500W 80+ Silver power supply in it, but there are no more options to upgrade past that. The PC is about 2 years old, it's a Haswell i7 4770K @ 3.5GHz, 84W TDP (I never got around to heavily overclocking this, even though it should be quite feasible). 2 of the 4 DIMMs in use, mSATA SSD boot drive, 1 HDD, 1 DVD. I use dual monitors via DVIs.
Current card is a 4-ish year old EVGA Nvidia GTX460 SC that I pulled from the previous desktop and put into this box when I got it, it's been working fine for 2 years, but is now the noticeably oldest component in the system, so I bought a new card when it went on sale @ Newegg this week. My understanding is that the GX460 requires about 160W, same as the new card, an EVGA NVidia GTX960 SC (short-length card for Mini-ITX use, it is actually even shorter than the GTX460, so it fits comfortably in the case).
First thing I did was update the NVidia drivers to newest, expecting this to be a 15min swap job. Then power everything down and take the case apart, pull the old card out. I put the new card in, and powered the box on. I got the "Please power down and connect the PCIe power cables for this graphics card" message, and then the GPU fan spun down. I of course, had plugged in the connector before powering on. So, I re-seated the new card, and re-seated the power connector and tried again, same thing. Hmm...
The GTX460 had 2x 6-pin aux connectors. Interesting thing about this PSU is it only has one PCIe aux power pigtail, with the typical 6/6+2 daisy-chained on the same leads. I was apparently brain-dead when I put this card in 2 years ago because I plugged both connectors from the same pigtail into the double connectors on the old card (which really shouldn't work, but it does). Reminder: this system has been fine for 2 years, so something was working there. The GTX960 has only 1x 6-pin aux connector, so I had connected that to the one aux power connector (as one would expect).
Stuff I did:
I tried updating the BIOS on the machine, same message on boot.
I tried using the double 4-pin Molex to PCI aux connector adapter instead, to see if one of the other pigtails from the PSU was better (note, it doesn't have molex on 2 pigtails so it's really only pulling from one rail). Same message on boot.
I tried disconnecting the HDD + DVDs (since I only need the SSD to boot and thought maybe I was on the edge of current limits). Same message on boot.
I measured the voltage on the pins of the 6-pin PCI aux connector with a multimeter, this is the part that bothers me, they all read around 5V (instead of 12V). However, with no load, maybe that's normal?
The PSU is a Shuttle PC63J: the one I have is 80+ Silver (that one is Bronze). On the label of the PS, the 12V rails are labelled as +12V1 - 16A, +12V2 - 16A, +12V3 - 17A, totalling 49A. The card needs something like 29A, according to this, no idea how accurate it is. The Shuttle power calculator suggests I am around 315W out of the 500W budget, should have a lot of headroom.
With the old card in, I tried booting without the aux connectors attached to it. The box won't boot (but doesn't give the same message as the new card). Once I connect the aux connectors to the old card, everything boots fine, which is how I'm typing this post now - system completely reverted to how it was, me scratching my head.
Next move is to go to my friend's house and try the new card in his PC to see if there's something wrong with it.
Anything else that I should try that I've forgotten to do?
