Topic Title: HD 7870 - high memory clock at idle load - seen in Catalyst 12.10, 12.11 Beta4 and Beta8
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Created On: 11/27/2012 01:37 AM
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 11/27/2012 01:37 AM
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Posts: 3
Joined: 11/27/2012

Graphics Card
Gigabyte AMD Radeon HD 7870 2 GB GDDR5 DVI-I/HDMI/2x Mini-Displayport PCI-Express 3.0 Graphic Card GV-R787OC-2GD

AMD Catalyst Driver Version, and Driver History
12.11 Beta 8, tested before on 12.11 Beta 4 and 12.10.

Operating System
- Windows 7 64-bit

Issue Details
Memory clock runs at 1250Mhz at idle (unlike GPU clock which goes down from 1150Mhz -> 400Mhz). Before 12.10, I'd see numbers something like 300/150Mhz at idle.

Motherboard or System Make & Model
Gigabyte P55-UD4P

Power Supply

Corsair 700W

Display Device(s) and Connection(s) Used
Primary: Dell U2412 -  DVI
Secondary: Dell 2007WFP - DisplayPort to DVI adapter.

Applications and Games

CPU Details
i5-750 quad core, no OC, 4 cores at 2.67Mhz

Motherboard BIOS Version
- AWARD F10 6/28/2010

System Memory Type & Amount
- 12GB G.Skill (2x4GB + 2x2GB), no OC

Additional Hardware

Additional Details
- My 7870 is OCed to 1150Mhz (up from 1100) and 1250Mhz (up from 1200), there is no issues with OC, temp at idle is around 31C and at full load about 48C. System is pretty stable. However, since 12.10, I've noticed that Memory Clock at idle load does not go down to what it used to be (if I recall it was something around 150Mhz-300Mhz). On the other hand, GPU clock goes down to 400Mhz (as expected). I recall it could have been around 300Mhz, but since then I added a second monitor.

I found out a smiliar issue in 12.11 beta driver release notes, but it says that it had been fixed in Beta8 - unfortunately it doesn't work for me. Please advice.

Thanks a lot,


I love AMD cards, they simply rock! 

 11/27/2012 02:05 AM
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Heavy Wizardry

Posts: 8774
Joined: 11/13/2009

Look at this guide > . Install the .net 4.5 first...then follow the suggestions to install your new drivers. Use these drivers >


Intel I7 960 @ 3.87ghz *Intel DX58SO *AMD R9 290 4gb *Corsair TX650M *2x4gb Corsair XMS3 *WD Black 1TB *Windows 7 Home Premium 64bit ***Asus N71Jq laptop *Intel I7 720QM Processor *Mobility Radeon HD5730 1gb *8gb Ram *Windows 7 64bit ** Toshiba P75-A7200 * Intel I7-4700MQ * Windows 8.1 64bit 

***** cetera fallunt, ludere mortuus ******

 11/27/2012 03:07 AM
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Joined: 11/27/2012

Hey Stumped,

Thanks for the quick response. I've followed your guide and did excactly what it said (BTW, it's nice to go back to a clean state), however I still see no improvement.

While performing the whole process, I took a few snapshots from my GPU-Z: see GPU-Z Snapshots.

One thing you can notice is that GPU/Memory clocks went down to 150/532Mhz w/o drivers and are at 300/1200Mhz with 12.11 Beta8. Also, w/o drivers, Windows detected only 1 display. This makes me suspicious that perhaps my dual display setup has something to do with the memory clock.

When I OC-ed my card (as it was before) 1100->1150 (GPU) and 1200->1250 (memory). The idle clocks went back to 400/1250, which is exactly what I had when I reported this issue.

I need to run a few more tests.

 11/27/2012 03:21 AM
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Joined: 11/27/2012

I need to run a few more tests.

After I disconnected my second (older) monitor, everything went back to normal (see this snapshot). Not only clocks are back at 150/300, but also temperature dropped down from 29->26C (which is nice as well).

Is it something wrong with the monitor connections or is it expected side effect of having two monitors connected? I'd rather not give up on my second monitor, as it's pretty convenient while gaming

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