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Unofficial X19xx Overclock Database: Post your OCs and voltages here - Page 7

post #61 of 123
OCer: Melcar
Card: X1950XT (256MB)
Brand: Sapphire
Clocks (Core/Mem): 702/945
VGPU: 1.500
MVDDC: 2.086
MVDDQ: 2.086
VDDCI: 1.500
Cooling: MCW60/Ramsinks

Notes: The memory won't overclock worth a damn. Going above 950MHz causes the system to lock and massive image corruption; adjusting the voltages doesn't help.

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post #62 of 123
Thread Starter 
That's a lot of voltage for 702, you sure you need that much?
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post #63 of 123
Quote:
Originally Posted by Ihatethedukes View Post
That's a lot of voltage for 702, you sure you need that much?
I don't think I need the VDDCI that high, but the VGPU does need to be at that level. 661MHz @stock (1.425V), 675MHz @1.450V, 688MHz @1.475V, and 702MHz @1.500V. I think it's just a bad core. Performance doesn't seem to scale as well as with nvidia GPUs, so I may end up decreasing the overclock (the card is plenty fast anyways).
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post #64 of 123
Thread Starter 
I'll have to dig the excel sheets out for this and update in the next day or two. I'm not sure about the scaling, I don't have enough nvidia experience where I really paid attention. My previous two cards were a 7800GS and a 7900GT and all I can vouch for is the ATI -LOOKING- much better and just plain being faster, which was to be expected, right? Either way, your 1950 clock speed scales much more like my little brother's 1900XT, that is, not very well compared to my XTX.

Do me a favor, eh? Hike your PCIe to about 120Mhz and try clocking it again.
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post #65 of 123
As for the scaling, I'm going by my experience in benchmarks. My 7900GS saw a bigger performance boost in 3DMark06/05 and in AM3 when overclocked, clock for clock. This card is obviously much faster (in benchmarks at least). Games are another matter; I need to get me some ATI "favored" games, since the ones I have are know to perform better with nvidia cards; performance remained about the same, with image quality increasing drastically (a moot point when your game remains unplayable at high settings).
Will try changing the PCIe clock and report back. Oh, and I downclocked to 675MHz (1.450V) just to be on the safe side (scores remained almost the same anyways). Been playing with the drivers for a while. Using the bare drivers (7.5) with ATITool + ATITT; much better and more responsive than CCC.
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post #66 of 123
Thread Starter 
What monitor/resolution/games are you trying to play at that for whatever reason your GFX can't keep up? My little bro's stock 1900XT plays BF2142, FEAR, HL2 (all current versions) and C&C3 on all max settings with a 1680x1050 resolution with frames permanently above 45.

My XTX runs all the same games on 16x12 and keeps it pegged on my vsync.

EDIT:And yes, CCC sucks. I use only ATItool.
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post #67 of 123
Currently playing Medieval 2: Total War. 1680x1050, 0xAA, 8xAF, all settings on medium, large armies; my 7900GS at 600/800 played those settings with frames in the high 30s and dipped all the way to 8fps (according to FRAPS avg. fps were 16); same settings (except all settings on high and normal sized armies) and my x1950xt at 675/945 does 45 in the high end 10 in the low (avg. 21). Not bad if you ask me; just expecting a bit more. Game looks 100x better, though.
Anyways, I tried setting the PCIe frequency to 120MHz and am running ATITool at 675/981 with the following voltages:
VGPU: 1.450
VDDCI: 1.500
MVDDC: 2.108
MVDDQ: 2.108

Are those voltages safe for the memory? And the PCIe freq. seems rather high; is it safe to leave it like that for every day use?
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post #68 of 123
Thread Starter 
See if you're able to pull more MHz at the same voltage now. Some cards respond really well to 115+ PCIe freqs.

So long as you don't start getting weird HDD behavior it's perfectly fine. I'm about 3 months from running a full year like that on my xtx and there's been no troubles on three different boards.

I tried to run 115 on my little bro's MSI board and apparently they were cheap and ran the sata frequency and the PCIe frequency off the same crystal. Basically the HDDs didn't like it and would periodically click a few times and 'die' just to reboot up fine. Once I backed it off to 105 the HDD probs went away. That's the only board I've had an issue with that though.

As for the memory voltage I've had it as high as 2.266v to set OCN's X1900XT/XTX records for mem and core speed. but typically use stock voltage for 800Mhz. I've ran the core up to 1.575v to do the same. Granted it's under water, but this card has really taken EVERYthing I've thrown at in stride and actually performs better now than it did when I bought it.


EDIT:
http://www.overclock.net/2229713-post133.html
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post #69 of 123
Currently at 681/981 with the same voltage as before. Looking good. One question; how hot should the regulators get? Right now they're at 93*C. I plan to put some heatsinks on them and maybe get on of those Vantec PCI fans to blow on them.
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post #70 of 123
Thread Starter 
What happened to the stock red sink across them? Does the 1950 have them? You should keep them below 90C... below 75C to be best (an 80mm fan will do this.). Will 93C kill them? No. But it's just good business.
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