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Degraded GPU PPD

A

APOLLO

[H]ard|DCer of the Month - March 2009
Joined
Sep 17, 2000
Messages
9,089
One of my 8800GT cards is fluctuating in PPD very erratically and wondering if anyone has had similar symptoms with their cards. The card is producing only half of its former production (2000-3000PPD) and I'm hearing a continuous clicking sound that seems to be emanating from the fan. On closer inspection, the fan doesn't appear to be spinning all that fast, or it's fast for a few seconds and then seems to slow down. Very weird.

I never checked it when it was working fine, therefore can't really compare before and after and I don't have another card identical to this. The card is the side-venting BFG 8800GT OC. Are these cards known to have issues, and if so what can I do besides replacing the stock HSF? How do I know if the card doesn't have a permanent problem like damaged shaders? I'm wondering if I should just replace the HSF or the whole card.
 
Dont know about the fan but there are fast and slow GPU protiens in the wild.
The 511 pointers are the slow ones and only do ~3.5k PpD on my GX2's.
The 353 pointers are the fast ones and do ~6k PpD on my GX2's.
The 584 pointers are also fast and do 5.5k PpD on my GX2's.
So depending on the mix of protiens you can get a big variation in your PpD.

Luck ............ :D
 
Hmm..., I don't know if this helps or not, but I have a PNY 8800GT 512, with the fan manually set with Precision at 100% (my GT runs hot) On a 5765 R13 C161 G9 353 pernt WU, read by FAHmon v2.3.4, I'm getting, ATM, 5754 pernts. My shaders are OC'ed to 1764 (1801 by sliders) and my temp is 54c (my ambient is about 21c) :)

I also have a eVGA 9600GSO (dual slot cooler) , shaders 1620, fan @ 85%, temp at 51c, and a eVGA 8800GS, shaders 1620, fan @ 100%, temp @ 50c to 51c's. My ambient for both is about 21c's and ATM the GSO has a 5761 R10 C14 G62 384 pernt WU and it's getting 3385 ppd. My GS is doin' a 5759 R1 C230 G21 384 pernt WU and getting 3492. :)

The GT and GSO are fed by Q6600's (stock clock) doin' WCG on cores #0, #1, and #2. The GS is fed by a E6600 (stock clock) with WCG on core #0 and GPU2 on core #1. The quads use the WinXP 32 bit OS and the E6600 uses WinXP64 64 bit OS. I also have a E6420 with Ubuntu v8.04 doin straight WCG :)

My ambient temp is read by an indoor/outdoor thermometer and my fan, gpu temps and shader freq is read by Precision. My ppd is read by FAHmon v2.3.4 :)

I hope this helps ;)

Folding and WCGing for the CURE

 
I'm certain something is out of whack somewhere. This was my fastest card and with the same WUs it is now producing over 1000PPD less than the slowest cards I have. Not only that but it fluctuates like mad within the same WU. It could be as low as 2000PPD and a couple of minutes later jump to over 35000PPD only to drop down again sometime later. No other card is exhibiting this bizarre behavior, so something is definitely wrong.

I had the shaders set to over 1800 until this happened. The higher I set the shaders now, the slower it seems to produce and I decided to drop it to default settings. I am using RivaTuner and also have the fan set to 100%. Do these cards automatically slow down if they are close to overheating, like a throttling mechanism for certain CPUs? I'm wondering what else can be the problem... :confused:
 
Is there any way for you to check the clocks of the GPU in realtime? Maybe something with the overclocking software is causing it to switch clocks? I dunno just a suggestion. Very weird behaviour though
 
Yeah I would check the Hardware monitor in Rivatuner and see if your clocks are fluctuating up and down. This could explain the strange behavior. Or check your CPU utilization. If another program is stealing your CPU cycles then maybe your GPU is sitting idle.

I am certainly not a graphics card pro but i've never heard of a GPU throttling. Usually if a GPU overheats the computer just crashes and reboots.:confused: At least in my experiences.
 
OK, I checked the monitoring tool in RT, and the core temperature is at 107 degrees. The fan is fluctuating anywhere between the 900s and 1200s RPM. I checked the cards in other systems and they're all reporting temps in the 70s... :(
 
yeah thats why the ppd is dropping then, the card must be throttling. time to rma it before it starts melting ;)
 
Tigerbiten said:
Dont know about the fan but there are fast and slow GPU protiens in the wild.
The 511 pointers are the slow ones and only do ~3.5k PpD on my GX2's.
The 353 pointers are the fast ones and do ~6k PpD on my GX2's.
The 584 pointers are also fast and do 5.5k PpD on my GX2's.
So depending on the mix of protiens you can get a big variation in your PpD.

Luck ............ :D
Click to expand...

Yeah, I have gotten nothing but the 511 ones for the last couple of days and those have really hurt my ppd averages. It's starting to p*** me off. :D
 
Also GPU-Z will report your current speeds, temps, and fan speed in real time. Might give that a shot if you don't trust what rivatuner is reporting.
 
arnemetis said:
Also GPU-Z will report your current speeds, temps, and fan speed in real time. Might give that a shot if you don't trust what rivatuner is reporting.
Click to expand...
I trust it. I just replaced this defective 8800GT with another BFG 8800GT that has a different OEM HSF and this card is working optimally, as I expected. I'm getting over 4500PPD on the slower WUs, so all is fine with the new card and system.

It's a good thing I have a few spare cards lying around. I'm seeing if I can rip off an HIS IceQ 3 HSF from an obsolete Ati 1950 to retrofit on the defective card. The core lines up and so do the bolt holes but the capacitors are somewhat in the way of the fan shroud and I'll have no cooling for the hot voltage regulators, nor will there be cooling for the memory chips. Anyone recommend a course of action? The card appears to still be functional otherwise.
 
Is it passable APOLLO that Rivatuner is not doing the correct job on setting the Fan speed?
I know that the 180.xx drivers have a fan bug in them (if your using those drivers).
What version rom is on that BFG 8800GT?
Is that an OC or OC2 version.
The latest version for BFG 8800GT OC is Version : 62.92.1F.00.65 (version 5)
They did a lot of changes to the fan and temp settings from version 1 to version 5.
I looked at the bios setups and I would defiantly suggest the version 5 for a BFG 8800GT OC
That file is here: http://www.mvktech.net/component/op...func,fileinfo/filecatid,2759/parent,category/
 
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