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HD 7870 GPU core fluctuation 3D clocks to 450Mhz

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#1
Anyone with an HD 7870 noticing in GPU Z, their core clock randomly dropping to 450Mhz very briefly?

I'm not seeing this fluctuation causing any problems in games so other people with an HD 7870 may not have noticed.

Apparently it has started happening since the 12.8 drivers.
 

Norton

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#2
Mine does the same thing (12.6 drivers). Doesn't seem to affect anything?

I'm using mine at full load gpu crunching on World Community Grid.... it seems to do it once or twice at the beginning of each work unit but goes to full load and stays there within 10 seconds or so.
 
Joined
Jun 12, 2007
Messages
4,815
Likes
639
Location
Wangas, New Zealand
System Name Darth Obsidious
Processor Intel i5 2500K
Motherboard ASUS P8Z68-V/Gen3
Cooling Cooler Master Hyper 212+ in Push Pull
Memory 2X4GB Corsair Vengeance DDR3 1600
Video Card(s) ASUS R9 270x TOP
Storage 128GB Samsung 830 SSD, 1TB WD Black, 2TB WD Green
Display(s) LG IPS234V-PN
Case Corsair Obsidian 650D
Audio Device(s) Infrasonic Quartet
Power Supply Corsair HX650w
Software Windows 7 64bit and Windows XP Home
Benchmark Scores 2cm mark on bench with a razor blade.
#3
Looking through other related threads on other forums there has been mentioning of overclocking the GPU core by a couple of Mhz as a work around.

Seems all HD 7870 regardless of manufacturer have this problem.
Some people have reported their GPU using a max of 66-68% when stress testing with certain stress testing applications.

I personally have not stress tested my card as I know the card does get utilized to it's maximum potential in games.
 

Norton

Moderator & WCG-TPU Captain
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Location
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System Name My Fortress/Trish (WCG)/Julia (WCG)/Ella (WCG)/Junior(WCG)/Cruncher 1 & 2/Kreij (WCG)
Processor Ryzen 1700X/i7-970/2600K/i7-980X/3930k/Opteron 6168x4/Ryzen 1600X/FX-8350
Motherboard X370 Taichi/ ASUS R3E/Asus P8P67 Pro/P9X79 Pro/EVGA X58 SLI 3/SuperMicro 4P
Cooling NH-D14/Phanteks/NH-U14S/H70/DeepCool/CM 212+ (x4)/NH-U14S/CM212
Memory 16GB GSkill TridentZ-3200 (1700X), 16GB GSkill FlareX-2400 (1600X),... various...., 4P- 16x1GB
Video Card(s) RX 580/HD 4670/HD 7770/HD 7770/HD 7770/onboard/HD 7770/onboard
Storage WD 500GB SSD/Seagate 2TB SSHD, everything else is Western Digital (mostly)
Display(s) Dell U2414H & 2409W / Dell 2208WFP (shared)
Case Silverstone FT01B/Source 530/Corsair 230T/Define XL R2/Silverstone FT05/Define R4/custom
Audio Device(s) on board (All)
Power Supply Corsair HX850/TX650/CS650M/X Gold 750/EVGA P2 850/X Gold 1050/HX650
Mouse Logitech G300s
Keyboard Thermaltake Challenger Prime (Great for $30!!!)
Software Win 7 Home 64 (Win 10 Pro 64)/Win Pro 64 or Ubuntu 12.04 LTS/14.04 LTS/17.04
Benchmark Scores Why sit on the Bench when you can get in the game and Crunch!!!
#4
Looking through other related threads on other forums there has been mentioning of overclocking the GPU core by a couple of Mhz as a work around.

Seems all HD 7870 regardless of manufacturer have this problem.
Some people have reported their GPU using a max of 66-68% when stress testing with certain stress testing applications.

I personally have not stress tested my card as I know the card does get utilized to it's maximum potential in games.
Mine seems to be maxing out in the same range but it's running so quick through these work units and giving me barely any slowdowns that I just never bothered to look.

I can only imagine how quick this card would be if it loaded up to 100% :eek: .... doesn't even need it for what I'm using it for atm.