Go Back   hwbot.org > Overclocking & benchmarking > Extreme overclocking

Extreme overclocking Refill your dewar here.

Reply
 
Thread Tools
  #1  
Old 04-20-2015, 12:56
der8auer's Avatar
der8auer der8auer is offline
HWBot Staff & Forums Administrator
 
Join Date: Dec 2007
Location: near Stuttgart - Germany
Posts: 2,925
Send a message via MSN to der8auer
Default GTX TitanX vs. A/E/G-Power



Over the last 2 weeks I soldered 9 x A/E/G-Power to TitanX cards and I wanted to give a little feedback of what 8 Pack and me experienced while benching a ton of TitanX cards.

GIGABYTE GPower
Initially we planed to use 4 x G-Power from GIGABYTE because you can connect the G-Power controller via USB to the system and controll the cards over software. It's easier for 4 cards than using the controller.

Following my TitanX-External-Power-Guide I attached one G-Power first and applied the normal FB-Memory mod. However, using 1,75 Volt on the memory the stock VRM died. Probably just bad luck because on all other cards the mod worked without any problems.
As a result I attached the G-Power V2 voltage output to the memory on the card so we can still use it. The problem is that we lost about 200 MHz on the memory moving from stock VRM to G-Power on memory.
Testing the G-Power on the core we always experienced OCP at around 1800 MHz @ 1,6 Volt (all voltages down to 0,0 Volt. G-Power shut down). I first thought it was just a problem with the card itself but we had exactly the same on the 2nd card.

So my conclusion about G-Power so far:
+ Software-Control possible
- Don't use V2 at all on memory or you lose MHz. Always keep stock VRM
- You will face OCP. We're already in contact with sofos and Hicookie but so far we couldn't find a solution


EVGA EPower 2.0
The EVGA EPower works very well acually. We used it on 3 cards and no OCP/OVP or anything else. However, two EPower cards died at around 1,8 Volt and 2k+ MHz on the core. I guess there is no ocp and the power draw was just too much for these cards. On one card we suddenly had a spark near the front MLCC capacitors and eventually one tantal cap blew up:

picture courtesy Overclocking TV

So I removed the EPower and luckily the card was still alive (GPU resistance ~3 ohm). So I attached our spare EPower which worked fine for about 5 hours. Suddenly bad smell and all LEDs of the EPower shut down. So again - EPower dead. This time there was an internal short close to the mid PCIe-Connector. The ground layer of the EPower near the connector was totally burned so I guess there was an internal short somewhere (forgot to take a picture of this - sorry).

So my conclusion about EVGA EPower 2.0:
+ The Board works very well
+ No OVP or OCP
- However we lost 2 out of 5 which seems quite a lot.
- EVGA EVbot needed


ASUS Power Card
The ASUS Power Card has a very nice design and great features. You can set the voltage directly on the card and you don't have to use an external controller. This is great for one card but using 4 cards with all the cables it's not that easy to access.
Elmor is doing a great job with the development and if you have any feedback or problems let him know!
He also recommended to me to place some additional heatsinks on the inductors and use a very strong fan for TitanX.
We could run 1,8 Volt at over 2000 MHz on the GPU without any problems so the card is indeed very well designed. Just over 1,85 Volt we had OVP which I'm sure Elmor can solve with a new firmware.

Conclusion about ASUS Power card:
+ Good design and easy to use
+ No controller needed (good for single/dual card)
+ No OCP
+ Firmware is easy to flash over micro USB
- Difficult to use in 4 way without controller
- OVP above 1,85 Volt.
- Current heatsink is too high for 4-way


Overall conclusion:
All cards have their positive and negative aspects. In general for TitanX I would recommend EVGA EPower or the ASUS Power Card. However my personal favorite is the ASUS Power card. Simply because it's so easy to use and if there is any problem Elmor can simply send a new firmware to you.
__________________


Looking for LN2/DICE containers? Don't miss this offer

Last edited by der8auer; 04-20-2015 at 12:59.
Reply With Quote
  #2  
Old 04-20-2015, 13:00
Alex@ro Alex@ro is offline
robo cop
 
Join Date: Oct 2007
Location: Romania
Posts: 412
Default

Madness ! Very nice info !
Reply With Quote
  #3  
Old 04-20-2015, 13:11
Xtreme Addict's Avatar
Xtreme Addict Xtreme Addict is offline
robot overlord
 
Join Date: Jun 2010
Location: POLAND
Posts: 1,399
Send a message via Skype™ to Xtreme Addict
Default

Nice info.

Regarding Epower dying issues, not sure but maybe new batches are just more fragile? I remember first batch of production was very strong and later batches were dying all the time, even on GTX 750 Ti cards
__________________
ASUS Polish Overclocking Championship 2010 #1st
MSI MOA 2012 EMEA - #1st
MSI MOA 2012 WW FINALS - #7th
ASUS Open Overclocking Cup AOOC 2012 - #1st
MSI MOA 2013 EMEA Qualifier - #2nd
ASUS Open Overclocking Cup AOOC 2013 - #3rd
MSI MOA 2013 WW FINALS - #3rd
Galaxy GOOC 2013 Finals - #12th
HyperX OC Takeover HOT Final CES 2014 - #1st
G.skill OC World Cup 2014 - #3rd
HyperX OC Takeover HOT 2014 Computex - #1st
Intel OC Challenge Computex 2014 - #1st
MSI MOA 2014 WW Finals - #12th
ASUS Open Overclocking Cup AOOC 2014 -#2nd
Galaxy GOOC 2014 Finals -#4th
HyperX OC Takeover HOT Final CES 2015 - #1st
G.skill OC World Cup 2015 - #?
Reply With Quote
  #4  
Old 04-20-2015, 14:19
Wizerty Wizerty is offline
robo cop
 
Join Date: Jan 2010
Location: FRANCE
Posts: 225
Default

That's a really nice feedback, I wasn't expected this from g-powerbaord...
A-pwr : 1.85v is not enought really ? how much drop you've got ? Have you try to solder feedback wire on sense pin ?
__________________
Reply With Quote
  #5  
Old 04-20-2015, 15:35
coolice's Avatar
coolice coolice is offline
maintenance bot
 
Join Date: Aug 2007
Location: MALAYSIA
Posts: 27
Default

1.85v measured from?
Reply With Quote
  #6  
Old 04-20-2015, 15:40
der8auer's Avatar
der8auer der8auer is offline
HWBot Staff & Forums Administrator
 
Join Date: Dec 2007
Location: near Stuttgart - Germany
Posts: 2,925
Send a message via MSN to der8auer
Default

1,85 set at the Power Card directly
__________________


Looking for LN2/DICE containers? Don't miss this offer
Reply With Quote
  #7  
Old 04-20-2015, 15:57
Splave's Avatar
Splave Splave is offline
Opera aficionado
 
Join Date: Jan 2007
Location: UR MOMS HOUSE
Posts: 2,654
Default

madness
__________________
Quote:
Originally Posted by oc_windforce View Post
you are pi-machine....
Reply With Quote
  #8  
Old 04-20-2015, 16:30
Hiwa Hiwa is offline
transformer
 
Join Date: Nov 2011
Posts: 501
Default

best thread of the year for sure
Reply With Quote
  #9  
Old 04-20-2015, 19:32
dx4picco dx4picco is offline
grunt bot
 
Join Date: Aug 2012
Location: France
Posts: 149
Default

nice work guys
__________________
Reply With Quote
  #10  
Old 04-20-2015, 19:49
Strat's Avatar
Strat Strat is offline
robo cop
 
Join Date: Feb 2010
Location: FRANCE
Posts: 239
Default

Great work and great review. Congratz
__________________
Reply With Quote
Reply


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 00:13.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Copyright COLARDYN IT GCV 2004 - 2013