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I have two AMD Radeon HD3850 GPUs running on crossfire and I just noticed that they have different clock speeds.
The first one(the one the displays are connected to) has the following clock speeds:
GPU Clock: 300 MHz
Memory Clock: 829 MHz
The second GPU has these clock speeds:
GPU Clock: 669 MHz
Memory Clock: 829 MHz
Is this normal?
Constantine Loukas
Posted 2014-01-17T19:16:13.107
Reputation: 105
Depends are they exactly the same product? Because it sounds like one is slightly faster and perhaps overclocked and other other is at its stock speeds. Are both the same type of PCI-E bus? – Ramhound – 2014-01-17T19:23:20.967
They are the exact same product. Could it be the motherboard/PCIe connection? – Constantine Loukas – 2014-01-17T19:30:04.317
I asked two questions. I need the answer to both in order to answer your followup question. – Ramhound – 2014-01-17T19:42:10.387
Woops, sorry. Didn't see the second question. The specs of the motherboard say "2 x PCIe x16 (blue @ x16 mode, black @ x4 or x1 mode)". Is it the same thing? – Constantine Loukas – 2014-01-18T08:16:35.027
No, its not the same thing, you second card is on a PCIe slot thats is a 1/3 of the speed. I would gather that is the reason your cards are running at different clock speeds. – Ramhound – 2014-01-18T14:11:44.057
I see, thanks. Do you want to put this into an answer so that I can pick it as correct? – Constantine Loukas – 2014-01-19T11:05:03.507