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[Official] AMD HD 69xx Owners Club - Page 181

post #1801 of 3890
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Originally Posted by Spct View Post
Captain Razor, nice card, dirty Case Fan.
yeah it's now the time to clean it!
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Little Ceaser
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post #1802 of 3890
Count me in, 2x



XFX 6950 2gb unlocked running at 880/1325 with stock voltage
HIS 6950 2gb unlocked running at 880/1325 with stock voltage
3dmark11 score: P9954
Running catalyst 11.4

Full watercooled setup
GTX360 radiator, blue yate-loon fans, PWM control over all of it
2600k on Swiftech GTZ water block @4.3ghz
Both cards are on XSPC Razor 6970 blocks, XFX on Shin-etsu, HIS on AS Ceramique

GPU temp maxes around 40c and Vram (highest of 3) maxes at around 53c; CPU maxes around 52c (all of these are at ~23c room temperature)
post #1803 of 3890
Quote:
Originally Posted by Dr.GumbyM.D. View Post
XFX 6950 2gb unlocked running at 880/1325 with stock voltage
HIS 6950 2gb unlocked running at 880/1325 with stock voltage
Quite low OC for a watercooled setup? I was able to do 880/1375 with stock cooler. Stock volts also. With Accelero XTREME Plus I'm able to do around 900-920MHz on stock volts I think. With those temps you should be running both GPUs at 1GHz Still, really nice setup, I envy you
post #1804 of 3890
Quote:
Originally Posted by Tuxi View Post
Quite low OC for a watercooled setup? I was able to do 880/1375 with stock cooler. Stock volts also. With Accelero XTREME Plus I'm able to do around 900-920MHz on stock volts I think. With those temps you should be running both GPUs at 1GHz Still, really nice setup, I envy you
It probably is a low OC (definitely nothing worth writing home about), but I really don't want to have to mess with RMAs or anything if I screw it up by OCing, and I'm a little concerned about overheating my loop since I only have 1 360 radiator (even though it's the best temp lowering radiator).

Also, isn't there a point at which OCing the 69xx series isn't worth it anymore, and it actually starts to decrease performance? What is that limit? I believe it's only on the memory, as part of a DDR error-checking thing correcting errors over a certain speed.

I haven't finished making my way through this whole thread yet, so I haven't really seen others' limits yet. Make suggestions for a comfortable overclock if you don't mind?

Thank you for the positive comments. The rest of my build thread is here if you're so inclined to see what I'm working with
post #1805 of 3890
Quote:
Originally Posted by Dr.GumbyM.D. View Post
Also, isn't there a point at which OCing the 69xx series isn't worth it anymore, and it actually starts to decrease performance? What is that limit? I believe it's only on the memory, as part of a DDR error-checking thing correcting errors over a certain speed.
..try 1.3v and ~970mhz core.. memory will need more volts typically @ +1350-1370mhz..you should be fine with load temps still, judging from your current OC. The voltage increase alone will instantly bring another 4-6c idle.

*I run 1020mhz @ 1.32v core for daily use on water. Max load= 46c

**and what you are referring too..is the error correction in the memory..clocking mem too high will result in lower performance. Clocking core beyond stable voltage limit will yield no increase or worse performance.. so if you are raising speeds on the core with no affect on benchies/FPS.. you probably need more voltage.
post #1806 of 3890
Quote:
Originally Posted by CL3P20 View Post
..try 1.3v and ~970mhz core.. memory will need more volts typically @ +1350-1370mhz..you should be fine with load temps still, judging from your current OC. The voltage increase alone will instantly bring another 4-6c idle.
Thank you, I appreciate that info!

Since I'm pretty new to this, I'm hesitant to start playing with voltage. My next question related to this are:

Do you test settings in afterburner, then lock them in with RBE modified bios, or you just run Afterburner 24/7? My concern is that one of the recommendations to prevent random lockups in BFBC2 is to turn off AB, which sets your clocks back to stock.

Second would be with my voltage hesitation, what would you recommend for max speeds at stock voltage on RAM and GPU? The answer is that it's probably dependent on the specific modules I have (binning, random luck, etc), but I'm sure there are some sure-fire speeds attainable at stock voltage?

I'm terrified of messing with voltage ever since upping my CPU voltage by like .2v when I was on an H50, and my temps instantly skyrocketed, hitting TJmax and downclocking my CPU. That makes me very uncomfortable...
post #1807 of 3890
i run AfterBurner all the time.. I dont have issues with games played on this rig.. As well I usually reset to stock clocks/volts, once done gaming, and turn the radiator fans off [I have GPU only loop]. Passive radiator is more than enough to keep 2D mode cool..or for my kids to play games on the internet without issue.

For a BIOS flash for clock speed... I wouldnt recommend you EVER flash for more than your GPU is capable of on stock volts. Most cards will do at least 900mhz core without any increases in voltage.. so I would say that would be a "safe" place to start for editing/flashing.

-For max volts for daily use.. its all about temps and PSU.. my TX650 is straining to keep this GPU fed once I start pushing higher clock speeds [+12v inputs dipping to 11.81v under load]. This is what is limiting me to 1.32v and 1020mhz core speed... not much else. I have tested using a TPQ1200 PSU, and the GPU was fine with 1.35v [max in AFE] and 1080mhz core... though I have other mods that are required for breaking 1100mhz core it seems.

*I would look for your max stable clocks with 1.3-1.32v as a limit..or +65c on your GPU...which ever comes first.
post #1808 of 3890
Quote:
Originally Posted by CL3P20 View Post
i run AfterBurner all the time.. I dont have issues with games played on this rig.. As well I usually reset to stock clocks/volts, once done gaming, and turn the radiator fans off [I have GPU only loop]. Passive radiator is more than enough to keep 2D mode cool..or for my kids to play games on the internet without issue.
I've got my whole loop's fans on PWM control from the motherboard, and since no game stresses the GPUs and not CPU, the fans kick up on their own, and run at ~20% when I'm not gaming, so that works for me. It's not quite passive, but it's fine for what I need it for (to be quiet)

Quote:
Originally Posted by CL3P20 View Post
For a BIOS flash for clock speed... I wouldnt recommend you EVER flash for more than your GPU is capable of on stock volts. Most cards will do at least 900mhz core without any increases in voltage.. so I would say that would be a "safe" place to start for editing/flashing.
If that's the case, then i'm just going to use AB for my overclocks. The reason I was considering the flash was because one of the reasons for BFBC2 to crash is said to be AB conflicting with punkbuster, but I still get crashes when AB is entirely off, so that's not it, so I might as well have it running.

Quote:
Originally Posted by CL3P20 View Post
-For max volts for daily use.. its all about temps and PSU.. my TX650 is straining to keep this GPU fed once I start pushing higher clock speeds [+12v inputs dipping to 11.81v under load]. This is what is limiting me to 1.32v and 1020mhz core speed... not much else. I have tested using a TPQ1200 PSU, and the GPU was fine with 1.35v [max in AFE] and 1080mhz core... though I have other mods that are required for breaking 1100mhz core it seems.
I've started monitoring my 12v rail through asus's AI suite, and it doesn't seem to move even when running kombuster on extreme settings while folding... so I don't know how I can stress it more (I guess I should monitor while playing BFBC2 since that's almost the most overall resource intensive game I've come across). Hopefully my Corsair 750HX is up to the challenge of 2x6950 OCed. Fortunately I'll have a little bit extra power for the cards since my CPU is lower power usage than 1366 are.
post #1809 of 3890
Quote:
Originally Posted by Dr.GumbyM.D. View Post
Also, isn't there a point at which OCing the 69xx series isn't worth it anymore, and it actually starts to decrease performance? What is that limit? I believe it's only on the memory, as part of a DDR error-checking thing correcting errors over a certain speed.
I'm going to test this today. 1400MHz seems to be the max stable overclock for the memory and I think I could lower it to 1350-1375 for a BIOS overclock I'm going to do. Also my GPU mines like a animal at 1GHz with 1.275V. Maxes out around 60c with air cooling so I think you'll be safe doing around 1.3-1.35V. Just as CL3P20 pointed out On the other hand I wouldn't go much over 1.3V for 24/7 usage. 1.275V is actually quite a stretch for me as after 960MHz it was 0.025V for every 10MHz so I could be doing 950MHz at 1.175V. But as it doesn't overheat or anything I'm keeping it at 1GHz just because I can and because it - once again - mines like a animal
post #1810 of 3890
Just got mine sorted, bought it about a week ago.

Running at 1ghz (ok 999mhz) and 1450 air cooled. Gives a pretty good score on 3dmark too with the i7 920. Just testing it some more now and will report back if it melts.

So far done GTA4, 3Dmark and now gonna watch Debbie Does Dallas. That will really test it!
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My System
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i7 990x @ 4.3ghz HT on Gigabyte X58-OC HD 7970 X 2 24gb @ 2000mhz 
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500gb ssd/hhd hybrid and 500gb hdd and 1tb ext hdd LG Blu Ray& Asus DVD R/W Windows 7 Hanns-G 28" 
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It has one 875w Thermaltake Toughpower XT NZXT Phantom in red. It has one 
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