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Your MP 3,1 RAM temp?

filmak said:
I also think that it is PSU's problem. Only our MCH core 1 an 0, volts match probably because the variation is too small at ~1.25 volts.

Now, Sorry for the off topic:
I have just upgraded this mac pro to 10.10.4 and much of the slowness of 10.9 is gone. everything is snappier.
Perhaps the OS oriented issue with the 3,1 bus (regarding GPU speeds) being slower is solved?
Can you please recommend me any reliable GPU to upgrade the 5770? (no external PSU please) Lightroom (openGl GPU), Adobe cs apps, not gaming, 2 nec displays 1900*1200.
Thank you in advance,
Click to expand...
It all depends on what price range you are aiming to.
 
Flashed gtx970 would be great. or gtx780 if you don't want to depend on webdriver.
 
So, I have took out my psu. disassembled it, cleaned of dust and assembled back

now getting pretty healthy voltages under load

Here it is with 8 sticks of memory (22 gigs) under load with valley.


IrC9Iec.png

Pretty fing great
 
Got OWC ram installed now. Temps dropped about 10°C. Noise level dropped significantly. Maybe those cheap dimms would be okay, if the mac was in a different room than me. Just wish that OWC would open a web store of their own in EU. Ordered from macupgrades. 10 days they didn't answer my daily quesion about ETA. Then "shipping tomorrow" and another 5 days of silence. Dimms were not even packed well and the box was crushed... Fortunately they weren't damaged...
 
toke lahti said:
Got OWC ram installed now. Temps dropped about 10°C. Noise level dropped significantly. Maybe those cheap dimms would be okay, if the mac was in a different room than me. Just wish that OWC would open a web store of their own in EU. Ordered from macupgrades. 10 days they didn't answer my daily quesion about ETA. Then "shipping tomorrow" and another 5 days of silence. Dimms were not even packed well and the box was crushed... Fortunately they weren't damaged...
Click to expand...


Have you checked Crucial.eu?
They deliver almost next day in Europe. I can't remember about their exact price for the FBDimms but I think it was similar to OWC and of excellent quality.
 
filmak said:
Have you checked Crucial.eu?
They deliver almost next day in Europe. I can't remember about their exact price for the FBDimms but I think it was similar to OWC and of excellent quality.
Click to expand...
Yep, crucial doesn't offer dimms for older MP's anymore...
But OWC offers so much more than just dimms...
 
toke lahti said:
Yep, crucial doesn't offer dimms for older MP's anymore...
But OWC offers so much more than just dimms...
Click to expand...
Crucial still sell 800MHz FB-DIMMs for the 2008 Mac Pro 3,1 (they will work in the 1,1 & 2,1 too). However they are crazy expensive at over £900 ($1400) for 32GB (8x4GB). OWC is crazy expensive too at over $700 plus shipping & tax for the same 32GB of RAM.

As I already posted just look on eBay for used 667MHz FB-DIMMS pulled from Xeon servers at about $100 for 32GB.
 
I bought once 4x2gb from ebay for around 200$, they were pretty hot. Few years later bought 4x4gb for same amount of money from ebay, these are colder and runs more stable, without overheat. all are 800mhz modules.

now its 4x4gb + 4x1gb, runs pretty stable and fast.
 
nigelbb said:
BTW The 667MHz parts run much cooler than the 800MHz FB-DIMMs.
Click to expand...
+1
And there is not any noticeable difference in everyday use, between 667 and 800MHz...
Also, just for info, if I remember ok, if you mix 800 and 667 all the fbdimms will run at the slower 667 MHz speed.
 
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I had 16GB Transcend FBDIMM 800 Mhz in my MP 3.1. They get so terrible hot... I could frie a chicken on them. :confused:

Upgrading my Bro's MP 3.1 this summer. Will be buying 16/32 GB 667 Mhz and installing a SSD / SOLO x2. After reading here on MR that many users see no real difference in speed. Should give him a good speedbump.

Cheers
 
Depending on your current configuration you could have a free upgrade or even make a profit by buying 32GB (8x4GB) FB-DIMMs pulled from a Xeon server for about $100 then selling on eBay the 800MHz parts that you remove from your Mac Pro.
 
Thanks @nigelbb Some of his 800MHz FB-DIMMS were fried and he now has only 2x1 GB left. So we'll be exchanging 16/32 GB with the cooler and MUCH less expensive 667MHz type!

Cheers
 
nigelbb said:
Crucial still sell 800MHz FB-DIMMs for the 2008 Mac Pro 3,1 (they will work in the 1,1 & 2,1 too). However they are crazy expensive at over £900 ($1400) for 32GB (8x4GB). OWC is crazy expensive too at over $700 plus shipping & tax for the same 32GB of RAM.

As I already posted just look on eBay for used 667MHz FB-DIMMS pulled from Xeon servers at about $100 for 32GB.
Click to expand...
Crucial.eu does not.
EDIT: I'm not sure about this anymore:
http://eu.crucial.com/eur/en/mac-pro-(8-core-xeon-5400-series)-2nd-gen*-early-2008/CT774462 says "not available", but you can still put them in to a cart...
Anyway the price is double than OWC's...

Anybody know if it's possible to slow ram to 667 when all dimms are specced to 800? (Once again missing the old BIOS...)
 
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toke lahti said:
Anybody know if it's possible to slow ram to 667 when all dimms are specced to 800? (Once again missing the old BIOS...)
Click to expand...
Why on earth would you want to do that? Far better to buy the vastly cheaper 667MHz FB-DIMMs in the first place. If you really must then a simple method would be to insert one 667MHz part & then all the RAM will be clocked at 667MHz.
 
I already have all slots full with 800MHz dimms. If it doesn't slow the machine much, but makes it a lot quieter, I'd like to slow it down when doing light things. And when horsepower is needed, throttle to full speed...
 
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toke lahti said:
I already have all slots full with 800MHz dimms. If it doesn't slow the machine much, but makes it a lot quieter, I'd like to slow it down when doing light things. And when horsepower is needed, throttle to full speed...
Click to expand...
Unfortunately this is not possible, you cannot control ram speed with a selection, you have to physically install 667 module(s).
 
the more ram you have the hotter it gets, some of my ram hits 80C according to hardware monitor.
(iv got all 8 slots full with 1GB/2FB & 4GB sticks)

not had any problems yet.

you may have dust bunys in your CPU heat sink (i must have a lot) that might be slowing the air a lot to the ram. one day ill get a new mac then maybe ill think about cleaning my CPU heat sink or finding a pc guy to do it and replace the thermal past on the cpu
 
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