Hey everyone, this is my first post here. This registration is way overdue anyway, ive been reading this site for a long time now. Finally got off my lazy butt and decided to join!
To start off, I have a few questions about oc'ing my brother's amd rig. Here are its specs (Shes only 3 days old!):
-Corsair 650W PSU
-2 x 6850 Sapphires in Crossfire
-Samsung 1 TB HDD
-ASRock 870 EXTREME3 AM3 AMD 870 SATA 6Gb/s USB 3.0 ATX AMD Motherboard
-G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)
-Rosewill Destroyer Case
- Gaming resolution is 1920x1080
Both Radeons are OC'ed to 850/1150 at stock voltage. These cards perform well.
We decided to OC the cpu to a safe 3.6 GHz since it has a stock heatsink (we just want a mild overclock on all parts to make computer run faster but with 0 risk).
Anyway, I set the multiplier to 18x in bios instead of the 16x which pushed the the cpu to 3.6 Ghz. I disabled Cool N quiet, and left everything else on Auto.
After that, I ran prime95 for 1 hour - no problems although the cpu temp was rising up to 59 degrees celcius.
At this point I had not touched any settings for the RAM at all. Ran the windows experience index and saw no change in score.
Ran the game STALKER call of pripyat. This is where things got weird. The game started having some major stuttering issues. I cannot understand why. At first i tried messing with the ram, but as im inexperienced i just ended up dropping everything back to stock for now so he can enjoy his new system while we figure this out.
We tried running the stalker COP benchmark. REALLY interesting to see that the overclock resulted in 10-15 FPS gains across the board (Min/avg/High) FPS. However, this induced lag really cancels the point.
How can a system that gets more FPS lag more than one with less FPS? Any idea what the cause is?
PS: One strange thing i noticed in SpeedFan (or some other HW monitor software) was that when running prime 95, the CPU Vcore voltage was changing. It went as high as 1.4. Just something i thought id mention.
PSS: the same stutter happens on the stock rig (except OC video cards) but rather rarely. We ran Fraps and it seems the stutter is caused by framerates dipping into the low 30s. Does this seem logical? Can a sudden FPS drop to 25-30 from 50 cause a lag like moment ? This is why we want that OC so bad, raising min FPS by 10-15 would possibly solve the problem, but it seems its making it worse? Ideas ?
To start off, I have a few questions about oc'ing my brother's amd rig. Here are its specs (Shes only 3 days old!):
-Corsair 650W PSU
-2 x 6850 Sapphires in Crossfire
-Samsung 1 TB HDD
-ASRock 870 EXTREME3 AM3 AMD 870 SATA 6Gb/s USB 3.0 ATX AMD Motherboard
-G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)
-Rosewill Destroyer Case
- Gaming resolution is 1920x1080
Both Radeons are OC'ed to 850/1150 at stock voltage. These cards perform well.
We decided to OC the cpu to a safe 3.6 GHz since it has a stock heatsink (we just want a mild overclock on all parts to make computer run faster but with 0 risk).
Anyway, I set the multiplier to 18x in bios instead of the 16x which pushed the the cpu to 3.6 Ghz. I disabled Cool N quiet, and left everything else on Auto.
After that, I ran prime95 for 1 hour - no problems although the cpu temp was rising up to 59 degrees celcius.
At this point I had not touched any settings for the RAM at all. Ran the windows experience index and saw no change in score.
Ran the game STALKER call of pripyat. This is where things got weird. The game started having some major stuttering issues. I cannot understand why. At first i tried messing with the ram, but as im inexperienced i just ended up dropping everything back to stock for now so he can enjoy his new system while we figure this out.
We tried running the stalker COP benchmark. REALLY interesting to see that the overclock resulted in 10-15 FPS gains across the board (Min/avg/High) FPS. However, this induced lag really cancels the point.
How can a system that gets more FPS lag more than one with less FPS? Any idea what the cause is?
PS: One strange thing i noticed in SpeedFan (or some other HW monitor software) was that when running prime 95, the CPU Vcore voltage was changing. It went as high as 1.4. Just something i thought id mention.
PSS: the same stutter happens on the stock rig (except OC video cards) but rather rarely. We ran Fraps and it seems the stutter is caused by framerates dipping into the low 30s. Does this seem logical? Can a sudden FPS drop to 25-30 from 50 cause a lag like moment ? This is why we want that OC so bad, raising min FPS by 10-15 would possibly solve the problem, but it seems its making it worse? Ideas ?
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