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- Jan 19, 2016
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| System Name | BTXTREME |
|---|---|
| Processor | QX6800 SLACP Core2 Extreme |
| Motherboard | Dell 0WG864 LGA775 BTX |
| Cooling | Dell T9303 heatpipe cooler, Delta GFB1212VHG 2 motor fan. |
| Memory | 8GB Dell DDR2@800 |
| Video Card(s) | Sapphire Dual BIOS R9-285 ITX O/C 2GB DDR5 |
| Storage | Crucial M500 240GB SSD |
| Display(s) | Dell 22" LCD |
| Case | Dell Dimension E 520 MT |
| Audio Device(s) | onboard sound with Logitech Z523 speakers |
| Power Supply | EVGA B2 750W semi modular |
| Mouse | Logitech wireless (two installed) |
| Keyboard | Logitech wireless backlit |
| Software | Win7-64, Throttlestop 6.00 overclock |
| Benchmark Scores | 3DMark 11 P7644 (52% )In Win7 64, Firestrike 6892 ( 58% ) http://valid.x86.fr/l2j5p1 |
You really have to read the label on the Dell PSU, and divide up the separate 12V x18Amp (216W) rails to see what you actually have, and how it's divided up between the cables. It's not uncommon to have a lot more total power, but not enough connectors to use it all. This produces safe and reliable computers in the OEM Dell configurations they sell/ lease/ and warranty. The PSU adapter board for the T5600 has more connectors, and even bigger PSU sizes. The simple solution is to use the T5600.
IDK for sure that that BIOS setting matters if you have enough RAM to support huge MPU/GPU shadowing. I'm guessing that based on what I posted before. I could be wrong about what that setting actually does. If you already have the parts give it a try and see what happens.
Probably video cards above 8GB weren't available when those computers were made, or Dell didn't offer them. Either way the BIOS setting either didn't exist yet, or wasn't needed for what Dell offered. But that's only if I guessed correctly what it does. They may have added something else to that BIOS setting so it does some other thing also? But the Tesla cards are probably pushing you into power, and RAM situations that Dell didn't anticipate then. The 1300W T5600 2x CPU, 2X GPU might be where you need to be. But maybe try one card in the T3600 and see if it works with that BIOS.
Here's the simplest example of the multi rail Dell PSU.
The old Dell Optiplexes has a 2 rail 12v. x18Amp PSU=432W 12V. power. It was rated at 305W based on the connectors it came with. When load tested to failure they make over 400W and shut down safely, and still work.
The Precision T3500 has the same 2 rail 432W PSU but added a 75W GPU cable It was rated at 375W. You can sometimes get away with a 8 pin adapter if the GPU doesn't really use the full 225W GPU power. Say maybe 180W.
With a 2nd GPU they added another 216W rail for 648W total. But it was rated 525W with 2x GPU support ( an added 150W) The trick is figuring out which connectors have the missing power.
IDK for sure that that BIOS setting matters if you have enough RAM to support huge MPU/GPU shadowing. I'm guessing that based on what I posted before. I could be wrong about what that setting actually does. If you already have the parts give it a try and see what happens.
Probably video cards above 8GB weren't available when those computers were made, or Dell didn't offer them. Either way the BIOS setting either didn't exist yet, or wasn't needed for what Dell offered. But that's only if I guessed correctly what it does. They may have added something else to that BIOS setting so it does some other thing also? But the Tesla cards are probably pushing you into power, and RAM situations that Dell didn't anticipate then. The 1300W T5600 2x CPU, 2X GPU might be where you need to be. But maybe try one card in the T3600 and see if it works with that BIOS.
Here's the simplest example of the multi rail Dell PSU.
The old Dell Optiplexes has a 2 rail 12v. x18Amp PSU=432W 12V. power. It was rated at 305W based on the connectors it came with. When load tested to failure they make over 400W and shut down safely, and still work.
The Precision T3500 has the same 2 rail 432W PSU but added a 75W GPU cable It was rated at 375W. You can sometimes get away with a 8 pin adapter if the GPU doesn't really use the full 225W GPU power. Say maybe 180W.
With a 2nd GPU they added another 216W rail for 648W total. But it was rated 525W with 2x GPU support ( an added 150W) The trick is figuring out which connectors have the missing power.
