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[Official] AMD R9 290X / 290 Owners Club - Page 3100

post #30991 of 43924
Quote:
Originally Posted by chiknnwatrmln View Post

Random question for anybody who might know a bit about power supplies:
If my PSU (Corsair AX860) is modular and has PCIe power cables that go from one connector at the power supply to two connectors at the graphics card, is it OK to run my card off one cable? I mean, it's ran fine at high voltages for a year now but I just randomly thought of this. I am drawing hundreds of watts through a single PCIe power connector.

there were several guys (miners) that burnt the power connections on their cards doing that. Burnt the connectors where they solder into the card. What happens is the increased resistance of the cables (not enough cross section of wire) creates heat. The more heat, the more resistance. The more resistance... well, its a cycle... which can end in burnt connections. FYI

So is it possible to kill a card like this? Yes.
     
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post #30992 of 43924
Interesting, thanks for sharing that. I'm gonna have to buy some one connector cables, my rig would look goofy with four extra connectors dangling.
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post #30993 of 43924
Just an FYI for everyone, I've been running the PT1 bios for a while now, but for the last few months I've experienced a lot of issues with crossfire 290x's and not having 100% utilization with both cards. In most cases I would get better performance running 1 card rather than both. this was a sporadic occurence though and it was difficult to nail down what was causing the issue. I tried different ram, operating system, drivers, driver settings, but nothing seemd to work. Turns out it was the bios causing the issue. Id recommend using the Asus.rom bios rather than the pt1 or pt3 bios for full time use. They are still good for benching and hard overvolting though. But inconsistent for daily usage.
post #30994 of 43924
Quote:
Originally Posted by chiknnwatrmln View Post

Random question for anybody who might know a bit about power supplies:
If my PSU (Corsair AX860) is modular and has PCIe power cables that go from one connector at the power supply to two connectors at the graphics card, is it OK to run my card off one cable? I mean, it's ran fine at high voltages for a year now but I just randomly thought of this. I am drawing hundreds of watts through a single PCIe power connector.

Some people will suggest running two separate power cables from the power supply. I for one have had no issues running my 290x's with one power cable. I've benched them up to +200mv and didn't experience any problems.
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post #30995 of 43924
Quote:
Originally Posted by pkrexer View Post

Some people will suggest running two separate power cables from the power supply. I for one have had no issues running my 290x's with one power cable. I've benched them up to +200mv and didn't experience any problems.
I have also gone up to +220mV without an issue, however I'd rather be safe than sorry. The cables seem pretty thick, so I asked Corsair to get their opinion.

Once I get my 2nd GPU I'm done overvolting, anyway.
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post #30996 of 43924
There are cards out there the say individual cables are a must, I would guess a 295 x2 card would be one. I don't like the looks of a daisy chained cable though so even when I had a 7870 and R9 270x I run 1 for each connector (4 total 6 pin connectors), but that was more for looks than anything else. I run 2 for my 290 also.

Do you think if you have a single 12v rail it makes a difference?
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post #30997 of 43924
It's all going to the same power source. Only time it would make a real difference is if you are heavily modded and are drawing something silly like 800w per card.
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post #30998 of 43924
Out of curiosity, i installed 3DMark and wanted to see what my score was. Although, it sucks i couldn't use the Firestrike Ultra. During the benchmarking, there was a lot of artifacts that i see. I may have to up the voltage a bit more.





Is that okay for a Xfire 290's OC to 1150/1380 with 69mV?
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post #30999 of 43924
Hi everyone.
I have R9 290X Reference Gigabyte GV-R929XD5-4GD-B, the memory is Elpida + installed Arctic Hybrid 2 water cooling.

I usually use to MSI AB 4, TRIXX (GPU-Z for watching).
I overclocked core to 1130MHz with +38mV (31mV also works), AUX +6mV , Power +50%, ULPS disabled, Force constant voltage - enabled.
Memory speed is 1375MHz - effective 5500
The same situation with the both versions of BIOS - uber and silent.
All temps is under 70C, core max 63.


So:
1. Is this OK that memory can't work even 1400 MHz?(I saw the description of RAM chips and I was confused, because by specification normal speed is 1500). If no, is there any way to get more memory frequency (may be some BIOS for Elpida memory exists)?
I was also trying to start memory 1500 with core +100mV and AUX +50mV , even 1400 and I get black screen.

2. What is the max safe AUX voltage?

3. And after getting more than 1150 MHz core - the card is throttling core to less frequency. How to avoid this?

Thank you.
post #31000 of 43924
Quote:
Originally Posted by Mydog View Post

Thanks I'll do that smile.gif

@Red1776

I can on visual inspection even without taking of the cooler confirm that my card has the golden SSC chokes mad.gif

I'm now on bios 1 but memory voltage are locked and core voltage only goes to +100mv, are there a special version of AB that I need to use?

I've got the same MSI card as you, gold SSC chokes. If you want more voltage, get Sapphire Trixx. The VRMs on this MSI design is much cooler (at least 15 degrees less) than the reference design. The only issue is the core temps are higher than the Tri X.
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