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 Thread : Anandtech - 780G CPU incompatibilities + 780i/790i data corruption
 
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This has already been posted in the MB forum but its half dead there, I figure this forum gets a lot more traffic and its pretty much just as relevant since mobos and CPUs go hand in hand...

http://anandtech.com/mb/showdoc.aspx?i=3279&p=1

Damn, this looks like some really serious ****!

Apparently 780G mobos with 3 and 4 phase PWMs (which is the majority of them) will literally fry within a few minutes or even seconds :ouch: when running 125W TDP processors, such as the X2 6400+ or Phenom 9850BE. I guess you could easily achieve the same results by overclocking slower CPUs too... perhaps enthusiasts should avoid this round of 780G mobos unless they run lower TDP CPUs or won't be doing any overclocking.

And if that ain't enough bad news, it appears with the 780i/790i, nVidia still hasn't fully addressed the data corruption problems that occurs during overclocking. The problem seems to occur at around the 400FSB mark with the RAM speed set within a certain range, DDR2 900 - 1200 and DDR3 1600+.

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Message edited by epsilon84 on 04-06-2008 at 08:30:24 PM
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Dont forget these as wel :X48 test notes:

a) Chipset defaults to tRD values that are excessively loose and are not competitive with NVIDIA’s new 790i. The problem is most MB manufacturers do not allow this to be specifically tuned in the BIOS.

b) DMI interface (x4 PCI-E link) is sloooow….X38/X48 should have been paired with ICH10(R), which will be PCI-E 2.0 compliant on the link interface.

c) Haven’t found an Intel X48 board yet that will handle 8GB of DDR3 properly, even though this is a major bullet for chipset support - board or memory makers? (We need to test this on the Intel DX48BT2 that just arrived.)

d) Chipset runs HOT…might even be hotter than 790i. Intel should have shrunk this thing long ago!

I raed this, and its not good for the mobo makers. They made it really hard to see which cpus work or dont, or not at all. These arent the enthusiasts mobo anyhow, theyll be coming soon


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epsilon84 wrote :

This has already been posted in the MB forum but its half dead there, I figure this forum gets a lot more traffic and its pretty much just as relevant since mobos and CPUs go hand in hand...

http://anandtech.com/mb/showdoc.aspx?i=3279&p=1

Damn, this looks like some really serious ****!

Apparently 780G mobos with 3 and 4 phase PWMs (which is the majority of them) will literally fry within a few minutes or even seconds :ouch: when running 125W TDP processors, such as the X2 6400+ or Phenom 9850BE. I guess you could easily achieve the same results by overclocking slower CPUs too... perhaps enthusiasts should avoid this round of 780G mobos unless they run lower TDP CPUs or won't be doing any overclocking.

And if that ain't enough bad news, it appears with the 780i/790i, nVidia still hasn't fully addressed the data corruption problems that occurs during overclocking. The problem seems to occur at around the 400FSB mark with the RAM speed set within a certain range, DDR2 900 - 1200 and DDR3 1600+.




This now is almost laughable....

Infact its now pathetic and sad, I am laughing...

How many things can go wrong for AMD....... Looks like another bumpy ride of bad news that is unbelievable to say the least.....

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Yeah, especially since its not their fault. They have everything listed properly, but the board makers themselves have it mucked up


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jaydeejohn wrote :

Yeah, especially since its not their fault. They have everything listed properly, but the board makers themselves have it mucked up



Yeah, you can't blame this on AMD, its simply the mobo makers cutting corners to make that extra buck. :sarcastic:

There is ALWAYS a drone.
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Ok, so given these issues, what are some reasonably safe Intel s775 and AMD AM2+ mobos? By "safe," assume latest chips, but only mild overclocking.


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epsilon84 wrote :

Yeah, you can't blame this on AMD, its simply the mobo makers cutting corners to make that extra buck. :sarcastic:




Yeah it maybe the motherboard manufacturers fault, but its AMD's problem..

Sniper
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jaydeejohn wrote :

Yeah, especially since its not their fault. They have everything listed properly, but the board makers themselves have it mucked up


Agreed.


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According to Anands, the AMDs are yet to arrive. The enthusiast boards that is. As for Intels, they mention the Intel DX48BT2 as a possible correct for some those problems, or at least the mem/gig issue using DDR3


Message edited by jaydeejohn on 04-06-2008 at 09:04:18 PM

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Well, the 780G line was really made for low power/HTPC computers, however, it is not acceptable that they did not make the electrical beefy enough to handle these new chips. Oh well, I'll still buy one in a few weeks. I have a short memory and plan on using a < 65W processor w/o OC.


Message edited by EXT64 on 04-06-2008 at 09:20:03 PM

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Im running the Gigabyte GA-MA78GM-S2H 780G motherboard with a 125w X2 6000+ just fine and have been for the last 2 month's with zero problem's. Not only that but im also running 2 hardrives and an 8800GT with 6 80mm fan's sometimes running at 100%.

Ive had no problem's with system instability and have had no crashes and i play games like Crysis for very long period's of time.


Soo im confused becuase from what they say my board should have melted about a month and a half ago but it has not?

Rubbish


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xX12amanXx wrote :

Im running the Gigabyte GA-MA78GM-S2H 780G motherboard with a 125w X2 6000+ just fine and have been for the last 2 month's with zero problem's. Not only that but im also running 2 hardrives and an 8800GT with 6 80mm fan's sometimes running at 100%.

Ive had no problem's with system instability and have had no crashes and i play games like Crysis for very long period's of time.


Soo im confused becuase from what they say my board should have melted about a month and a half ago but it has not?

Rubbish



Maybe its because Gigabyte are making the best motherboards now !!!!!

Its either Asus or Gigabyte for me, never experienced any problems with these manufacturers.....

In anycase overclocking a chip by a small amount, can only now hinder AMD.... As their processors have speed issues and overclocking issues anyway. With some cases the Phenom being out classed by a 6400x2....

Im now feeling sympathy towards AMD...

It might as well be their final nail in the coffin for being on their own and IBM buying them out after IBM loosing grounds with their power pc to Apple, I recon IBM has a score to settle.....

Who knows what the next 6 months has install for everyone...


Message edited by Hellboy on 04-06-2008 at 10:09:43 PM
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Interesting. I was going to get Gigabyte anyway. It seemed like they put the most effort into their board.


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amd ain't gonna die. they'll just lurk in the oem market till they get their enthusiast s4i7 together. same as intel did durring netburst. this is the board makers problem. i wont build another amd system for a good long while, but that's because intel performs that much better for the same price. someday soon i hope enthusiasts will realize what a small, very small percent we are in the market.if you sell 5,000,000 and only make $1.00 each in profit, it's still more than everyone i know makes combined in a year. google "amd dying" for fun some time or "intel kills amd" be sure to note the date the article was written. i found multiple time's since bout 2000 that topic has come up. when you see on fox news hector walking out handcuffed and the official story is amd is closing, then beleive they are dead.


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It looks like you need to check with AMD http://products.amd.com/en-us/RecommendedMBFilter.aspx before you buy any board.
Sad isn't it?
AMD will get the flack, even though they have it covered.
To the guy with the X2-6000, while it is a member of the 125w family, it uses less power than that. It may not mean you are safe, so keep your receipt. BTW the mosfets are for the chip only. Other devices on the mobo get thier power directly from the psu. (ie are not affected by the pwm cct)
There are only two boards that AMD says support thr 9850 (or at least that they have tested and qualified) Rather limiting IMHO.


Message edited by endyen on 04-07-2008 at 07:15:39 AM
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amdfangirl wrote :

I'd have to agree, Gigabyte is (currently) the best. Asus is pretty good. MSI has been running 24/7 for 5 years (some mofsets melted but I got them fixed). But peoples DONT BUY SAPPHIRE MOTHERBOARDS. BSODS, BIOS resets, graphics card incompatibilities, evil tech support. For 4 months I had to live with Floppy errors (I don't have one and needed to press F2 to countinue). If I changed anything in BIOS it would keep resetting until I found a solution "write saves to BIOS". Eventually I started having all sorts of incompatibles so I flashed the BIOS.

IT DIED

Had to cross-flash it with a Magic Pro BIOS (same board different colour) to make it work. Oohh not to mention Sapphire manual having really bad grammar and incorrect jumpers in the diagram. In fact by the end of the it I actually phoned Magic-Pro tech support (talk about being disparate). When I phoned Sapphire and asked them why the computer wasn't booting they responded with "Oh the PE-AM2RS690MH's 4 phase power thing can't supply enough power for a 45W processor so it can't boot".

CAN'T SUPPLY ENOUGH POWER TO A 45W PROCESSOR, right............. I believe you............

Now it works alright, kinda. Volume icon is nowhere to be found.

Sapphire = great graphics Sapphire = bad motherboards



Saying that, I have had a few Saphire Video cards go pop for no reason... One to avoid, Had problems with MSI boards, i try and keep away from them.....I put one in my Quad 6600 and its not happy....
Gonna change it for a Gigabyte motherboard, when i can be arsed...

Asrock motherboards are good too, for the budget end... seem to keep on going... Few troubles with Foxconn. ( Their nforce 4 motherboards were a night mare had five go wrong out of 30)...

Used EVGA, Very impressed although sparse on the manual front but it was one of the first 680i chipsets out...

Epox - yeah ok not much about now though. Used to like QDI but they went pony and had lots of failures so i walked away from them.... Intel motherboards are ok, never failed, but not exciting either....

Are DFI Landparty still around, havent seen one for ages, nore Supermicro motherboards ( in UK anyway ) for that matter.

Have sold Abit motherboards but they have become unreliable of late, hope this aint the trend....

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Message edited by Hellboy on 04-07-2008 at 06:06:41 PM
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Hellboy wrote :

Yeah it maybe the motherboard manufacturers fault, but its AMD's problem..



How do you work that out?



The mobo manuf's have to clearly list the power rating of their boards. Then the "problem" (which is really one of poor technical manuals and listing) is solved.




It will be Gigabyte, Asus, MSI etc boards dying, not AMD processors.

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