• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

HD 7970 24/7 unlocked voltage Overclocks?

MatTheCat

New Member
Joined
Jun 21, 2008
Messages
883 (0.25/day)
Likes
129
System Name Bitch
Processor Intel i7 2600K @4.6Ghz
Motherboard MSI Z68A-GD80 (G3)
Cooling Noctua nh-u12p se2
Memory 8GB Corsair Vengeance 1866MHz 9-10-9-27
Video Card(s) POWERCOLOR HD 7970 3GB
Storage OCZ Vertex 2 240GB SSD / 2*320GB WDC RAID 0
Display(s) Samsung 226BW 21" 1650*1080
Case Lian Li PC B-25
Audio Device(s) Creative X-FI Professional PCI
Power Supply OCZ PC Power & Cooling 860W
Software Windows 7 x64
#1
I am thinking of getting the Accelero Hybrid cooler for my HD 7970 gfx card.

With the stock cooler, it overclocks to (GPU) 1125Mhz / (vRAM) 1575MHz through CCC, with no voltage tweaks applied, with stock cooling.

This in itself is a pretty hefty overclock considering the default clocks of 925/1325 MHz. I would therefore like to get a bit of a consensus on how high these cards can go with sensible volt increases and improved cooling.

Thx.
 

erocker

Senior Moderator
Staff member
Joined
Jul 19, 2006
Messages
42,465 (10.10/day)
Likes
18,135
Processor i7 8700K
Motherboard Asus Maximus Hero X WiFi
Cooling Water
Memory 16GB G.Skill 3200Mhz CL14
Video Card(s) GTX 1080
Storage SSD's
Display(s) Nixeus EDG27
Case Thermaltake Core X5
Audio Device(s) Soundblaster Zx
Power Supply Corsair H1000i
Mouse Zowie EC1-B
#2
This in itself is a pretty hefty overclock considering the default clocks of 925/1325 MHz. I would therefore like to get a bit of a consensus on how high these cards can go with sensible volt increases and improved cooling.
They all differ. Sounds like you have a good card so perhaps you'll get over 1300mhz. Only thing you need to do is increase clocks, check for stability/temps and add small bump in voltage when needed... repeat.
 

MatTheCat

New Member
Joined
Jun 21, 2008
Messages
883 (0.25/day)
Likes
129
System Name Bitch
Processor Intel i7 2600K @4.6Ghz
Motherboard MSI Z68A-GD80 (G3)
Cooling Noctua nh-u12p se2
Memory 8GB Corsair Vengeance 1866MHz 9-10-9-27
Video Card(s) POWERCOLOR HD 7970 3GB
Storage OCZ Vertex 2 240GB SSD / 2*320GB WDC RAID 0
Display(s) Samsung 226BW 21" 1650*1080
Case Lian Li PC B-25
Audio Device(s) Creative X-FI Professional PCI
Power Supply OCZ PC Power & Cooling 860W
Software Windows 7 x64
#3
They all differ. Sounds like you have a good card so perhaps you'll get over 1300mhz. Only thing you need to do is increase clocks, check for stability/temps and add small bump in voltage when needed... repeat.
Yeah....I dont have any difficulty in overclocking graphics card, but I would like to get a bit of an idea on exactly how high I may be able to push the thing (whilst keeping things sensible). The cooler I am looking at is very pricey and I would be wanting to get much more for my money than simply having my PC run a bit quieter.

If things top out at 1200Mhz on the GPU, then I may have to reconsider the purchase. If it is likely that I could safely go beyond 1300Mhz, then that would be very tempting.
 

erocker

Senior Moderator
Staff member
Joined
Jul 19, 2006
Messages
42,465 (10.10/day)
Likes
18,135
Processor i7 8700K
Motherboard Asus Maximus Hero X WiFi
Cooling Water
Memory 16GB G.Skill 3200Mhz CL14
Video Card(s) GTX 1080
Storage SSD's
Display(s) Nixeus EDG27
Case Thermaltake Core X5
Audio Device(s) Soundblaster Zx
Power Supply Corsair H1000i
Mouse Zowie EC1-B
#4
It's pretty rare for a card to reach over 1300mhz. For now, just crank up your fan, make sure your ambient temps aren't too hot and let it rip! Sapphire Trixx works good because it gives you more voltage to play with, I would just start watching things if you decide to go over 1.3v
 

cadaveca

My name is Dave
Staff member
Joined
Apr 10, 2006
Messages
16,581 (3.85/day)
Likes
10,950
Location
Parkland County, Alberta
#5
If it is likely that I could safely go beyond 1300Mhz, then that would be very tempting.
It is best that you crank up the fanspeed of the current cooler and find out first, rather then just guessing and changing the cooler to be disappointed.

I guess this is why you are asking, but you coudl find out quickly for yourself. None of us can tell you if your card is capable or not.
 
Joined
May 12, 2006
Messages
880 (0.21/day)
Likes
335
Location
gangsterville kingdom
System Name ROG By purecain
Processor AMD Ryzen 7 1800X
Motherboard ASUS Crosshair VI Hero
Cooling TT Water3.0 Riing edition
Memory 16Gb G.Skill Trident RGB R4000mhz
Video Card(s) TitanXpascal 12Gb
Storage 1TbSamsung EvoM.2/1TbSamsung SSD/2Tb+3TbSeagate/1TBseagate/60GbForceGT/750gbHitachi Deskstar/500gbWD
Display(s) 55"Sony Bravia X855 10bit 4K+HDR@60fps 2K+HDR@120fps IPS panel
Case Thermaltake CoreX71 Limited Edition Etched Tempered Glass Door
Audio Device(s) On board/NIcomplete audio 6
Power Supply 1200wThermaltake Toughpower
Mouse Logitech MX MASTER
Keyboard Corsair Strafe Keyboard
Software Windows10pro
#6
how'd you get on maxthecat...

what where your highest clocks with a voltage bump...????
 

Phusius

New Member
Joined
Mar 23, 2012
Messages
1,316 (0.62/day)
Likes
369
Processor i5-2500k @ 4.5
Motherboard Asus Z68 Deluxe
Cooling Noctua NH-D14
Memory 16GB DDR3 1600
Video Card(s) Sapphire 7950 @ 1200/1475 @ 1175v
Display(s) Dell 23" 2ms
Case Carbide 500r
Audio Device(s) Asus Xonar DG
#7
I hit 1200 core with my Arctic 7970, at 1206v 100% stable.

Not sure if will I try for 1300 or not someday, 1200 is pretty beastly imo, especially since my PC is 100% silent lol