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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1783

post #17821 of 38701
Quote:
Originally Posted by th3illusiveman View Post

i wish mine had a non ref cooler so i could test out it's Limits...
Its 87% ASIC so i think it should fare well if it had a better cooler. But at my current clocks an extra 100-150Mhz doesn't warrant a $90 cooler.

Thats true i wouldnt buy the aftermarket coolers myself only waterblocks but thats cause i already have the loop setup with rads to cool a cpu and 2 gpus.
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SABERWOLF
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Samsung EVO 850 500 EK-SBAY Dual DDC 3.2 PWM Serial Alphacool NexXxoS ST30 Full Copper Radiator 360 Hardware Labs Black Ice SR2 Multiport Black Car... 
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F3-12800CL9S-4GBRL WDC WD1001FALS-00J7B1 ST31000340AS WDC WD7500AAKS-00RBA0 
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post #17822 of 38701
People test performance with 3D MARK? come on....fire up Crysis Warhead, put 8XAA and then try stock vs oc vram.
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post #17823 of 38701
After playing some more with my HD 7970 GE (ASIQ = 68.2%) by "forcing constant voltage" in AB, I found that the card can do 1165 MHz on default base voltage (that is, 1162 mV). 1175 mV is needed for 1175 Mhz (coincidence? rolleyes.gif). I can even do stock speeds of 1050/1500 on 1125 mV (did not test any lower). I wonder why AMD overshot the voltage by such a big margin on GE cards.thinking.gif

3DMark 11 at stock speed (I gained ~100 points by just undervolting...hmm):


On the other side, to be completely game stable at 1200 MHz I need 1300 mV. I played BF3 for 2 hours without any problems.

I am not comfortable of running this high voltage through the chip 24/7 though, because I have no means of adjusting voltage with "force constant voltage" unticked. Anything over 1200 MHz gives artifacts, but I am able to bench up to 1250. 1175 MHz on stock voltage will be my 24/7 clock.

I will focus on memory from now on. I know the yields will be low as the 79x0 cards are not memory bandwidth limited. Anyways, I have some questions about overclocking the memory on these cards:

1. Do upping the core voltage increase VRAM stability?
2. Is there any significant effect of upping the VRAM voltage? What voltage is safe for 24/7 use?
3. What is the common sweet spot on air (1600, 1700, etc.)?
Edited by ss1274 - 11/11/12 at 2:33am
post #17824 of 38701
Quote:
Originally Posted by Phenomanator53 View Post

Anyone else with a ridiculously low ASIC quality? mines 55.4%

My ASIC is 57%... I have it overclocked at 1250/1700 currently @ 1.312V . ASIC does NOT determine how far your card can overclock. All it tells you is whether your are going to need more or less voltage to achieve your cards maximum OC. Your ability to OC is still based upon luck of the draw and whether or not you got a good card or not.
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post #17825 of 38701
Does anyone have experience with this card: SAPPHIRE Radeon HD 7970 OC with Boost (http://www.newegg.com/Product/Product.aspx?Item=N82E16814202008)? Is it a good 7970 choice? Any glaring problems I should be aware of? Appreciate the help.
post #17826 of 38701
Quote:
Originally Posted by tsm106 View Post

I've had three Visiontek 7970s early on and had no problems with volting them. Try following the double checking your steps with my sig thread regarding AB installs.

Mind telling me what clocks/voltages were they running at?
post #17827 of 38701
Has anyone tried to hook up a H60 Corsair to their 7950? If so what results did you see and would you recommend this?

Thanks
post #17828 of 38701
Room Temp: 22
Flow Rate: 2213ml/min
D5 Rpm both Pumps: 3680

Idle Temps:
GPU 1 and 2: 24

GPU 1 vrm 1 and 2: 27
GPU 2 vrm 1 and 2: 27

Load Temps:
GPU 1 and 2: 33

GPU 1 vrm 1: 44 (dont know why is this difference btw gpu1 vrms)
GPU 1 vrm 2: 37

GPU 2 vrm 1 and 2: 39

internal01.jpg

*****

More photos here:
http://www.overclock.net/t/584302/ocn-water-cooling-club-and-picture-gallery/31830#post_18578582

*****
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post #17829 of 38701
so what are good programs to error check 7970's? Like how GPU Tool did
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post #17830 of 38701
Quote:
Originally Posted by Z Overlord View Post

so what are good programs to error check 7970's? Like how GPU Tool did

oct has error checker but your best choice is to just run a game and watch for artifacts.
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Samsung EVO 850 500 EK-SBAY Dual DDC 3.2 PWM Serial Alphacool NexXxoS ST30 Full Copper Radiator 360 Hardware Labs Black Ice SR2 Multiport Black Car... 
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SABERWOLF
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XEON-WOLF
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CPUMotherboardGraphicsRAM
Intel Core i7-6800K MSI X99A GAMING PRO CARBON EVGA GTX 1080 FTW Hydro Copper G.SKILL TridentZ Series 
Hard DriveCoolingCoolingCooling
Samsung EVO 850 500 EK-SBAY Dual DDC 3.2 PWM Serial Alphacool NexXxoS ST30 Full Copper Radiator 360 Hardware Labs Black Ice SR2 Multiport Black Car... 
CoolingCoolingOSMonitor
EK-CoolStream RAD XTC 420 koolance 380i Windows 10 Pro ASUS VW246H Black 24" 2ms 
PowerCaseMouseAudio
SeaSonic M12D SS-850 850W  Thermaltake core x71 CM Storm Sentinel Advance II Corsair Void 
CPUMotherboardGraphicsRAM
X5675@4400 1.344 ASUS P6X58D-E XfX RX480 RS F3-12800CL7T-6GBPI 6-7-6-21 1T 
RAMHard DriveHard DriveHard Drive
F3-12800CL9S-4GBRL WDC WD1001FALS-00J7B1 ST31000340AS WDC WD7500AAKS-00RBA0 
Hard DriveOptical DriveCoolingOS
Hitachi HDS723020BLA642 ihas 624-A SilverStone Heligon HE01 windows 10 64 Pro 
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