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Need some help Building new pc out of the grave of my old machine - Page 4

post #31 of 34
Quote:
Originally Posted by Piccolo55 View Post

8320e is a do called economic cpu, don't ask me why lol seems the 8300 is at the same watts but overclock it and it will be closer to 150 watts if you go over 4 grz

You 're underestimating the low leakers , at least as far as the real CPU consumption is concerned. The 8300 (as well as 8320E) is low leaker. It will hit 4Ghz at lower voltage than a 8320 and will likely continue to do so at least up to 4.5Ghz.

This is my 8320, undervolted to 1.28v (stock voltage without turbo is 1.325v) at 4Ghz. Real power consumption of the CPU, 110W (this is the "Power out" that HWinfo uses. The "Power in" is 130W, which is the wattage that the PSU effectively pulls from the wall to give to the CPU. So effectively, my PSU is running at 84% efficiency, which sounds about right).



Now, my 8300 (which i keep for spare), does 4Ghz at 1.26v, so even less. My 8320 was already a low leaker for being a "normal" (non "e") part. My 8300 comes with stock voltage 1.16v for 3.3Ghz. So when you climb the clocks, you start from 1.16v, vs something like 1.32v of an 8350. At 4Ghz, the 8300 is GUARANTEED to arrive at inferior voltage compared to that of a stock 8350.

The low leakers may hit a wall after 4.5Ghz faster than a 8350/8370, but that's just about it. And this might have something to do, exactly because, since they leak less, they tend to heat up inside the core easier, than high leakers.

Also, consider, that this is Prime95, which is the absolutely worst scenario you can put a CPU in. When i did my killawatt measurements for example, the power draw of the entire system from the wall, is 20W less when doing x264 encoding (100% load), compared to Prime95. For the entire system, it was 220W with Prime95 vs 200W with x264, from the wall ( if you calculated 80% PSU efficiency, the rig was really using 176W DC for Prime95, 160W DC for x264), which correlates well with HWInfo's estimate.

EDIT: The thing, is that FX chips start losing efficiency fast over 4Ghz. The best efficiency for FX, i think is around 3.5Ghz, where my 8320 can be undervolted to 1.164v.

So, up to 4Ghz, these chips aren't as power pigs as people like to believe, as long as you undervolt them. They are not the initial release chips of 2012, where you 'd occasionally see some unbelievable power pigs. Certainly not the low leaking parts, because in order to do 3.3Ghz for 95W like an 8300, you HAVE to be low leaker, there is no way around that (which is exactly why i bought an 8300, since i wanted to be sure that i won't get a power pig).
Edited by Undervolter - 6/19/16 at 2:01am
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FX-8300 Asrock 970 Extreme3 HIS 6570 Silence Corsair XMS3 1600Mhz 8GB (2x4GB) CAS9 
Hard DriveHard DriveOptical DriveCooling
Plextor M6S 128GB Toshiba 2TB SATAIII LiteOn Blu Ray burner IHBS 112-2 Xigmatek Balder 
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CPUMotherboardGraphicsRAM
FX-8320@4Ghz Gigabyte 970 UD3P rev2.1 Gainward GTX 750Ti Corsair XMS3 1600Mhz 16GB (4x4GB) 
Hard DriveHard DriveOptical DriveOptical Drive
Crucial BX100 250GB Western Digital Green 2TB LiteOn Blu-Ray Burner IHBS 112-2 LG BH16NS55 Blu-Ray Burner 
CoolingOSMonitorKeyboard
Scythe Katana 3 Windows 7 Pro 64bit ASUS 22" VS228HR Microsoft Wired Keyboard 600 
PowerCaseMouseAudio
EVGA 430W Sharkoon VG4-V Logitech M90 Onboard 
CPUMotherboardGraphicsRAM
FX-8300 Asrock 970 Extreme3 HIS 6570 Silence Corsair XMS3 1600Mhz 8GB (2x4GB) CAS9 
Hard DriveHard DriveOptical DriveCooling
Plextor M6S 128GB Toshiba 2TB SATAIII LiteOn Blu Ray burner IHBS 112-2 Xigmatek Balder 
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post #32 of 34
Found it. One can compare with this 2012 FX8350 specimen. I still remember this specimen, because it had scared the hell out of me, when i was pondering to leave my 1090T to go FX. And this specimen is actually the reason why i got 6300 at the beginning. Because this kind of power draw, was an undervolter's nightmare:


http://forums.anandtech.com/showpost.php?s=b2d0cfd56709b0225ac2cf52cc3fb57b&p=34377476&postcount=5

200W power draw, for the CPU alone at stock 4Ghz, 280W from the wall for the system. That's insanely high compared to the current low leakers.

If i had this 8350, i 'd take a hammer and smash it. There's no saving it, with any kind of undervolting. I remember i wanted to get the 8320, to get a boost in x264 encoding and everytime i was saying to myself "remember the anandtech guy, remember the anandtech! Don't do it!". Which is why i arrived to 2014 i think, to finally buy 8320.
Edited by Undervolter - 6/19/16 at 3:01am
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Crucial BX100 250GB Western Digital Green 2TB LiteOn Blu-Ray Burner IHBS 112-2 LG BH16NS55 Blu-Ray Burner 
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Scythe Katana 3 Windows 7 Pro 64bit ASUS 22" VS228HR Microsoft Wired Keyboard 600 
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FX-8300 Asrock 970 Extreme3 HIS 6570 Silence Corsair XMS3 1600Mhz 8GB (2x4GB) CAS9 
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Main
(16 items)
 
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(15 items)
 
 
CPUMotherboardGraphicsRAM
FX-8320@4Ghz Gigabyte 970 UD3P rev2.1 Gainward GTX 750Ti Corsair XMS3 1600Mhz 16GB (4x4GB) 
Hard DriveHard DriveOptical DriveOptical Drive
Crucial BX100 250GB Western Digital Green 2TB LiteOn Blu-Ray Burner IHBS 112-2 LG BH16NS55 Blu-Ray Burner 
CoolingOSMonitorKeyboard
Scythe Katana 3 Windows 7 Pro 64bit ASUS 22" VS228HR Microsoft Wired Keyboard 600 
PowerCaseMouseAudio
EVGA 430W Sharkoon VG4-V Logitech M90 Onboard 
CPUMotherboardGraphicsRAM
FX-8300 Asrock 970 Extreme3 HIS 6570 Silence Corsair XMS3 1600Mhz 8GB (2x4GB) CAS9 
Hard DriveHard DriveOptical DriveCooling
Plextor M6S 128GB Toshiba 2TB SATAIII LiteOn Blu Ray burner IHBS 112-2 Xigmatek Balder 
OSMonitorKeyboardPower
Windows 7 Pro 64bit Samsung S22B350H Microsoft Wired 600 Corsair VS350 
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Lepa LPC 306 Logitech M90 Onboard 
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post #33 of 34
If you'd had it I would have said "Don't smash it - Send it here".
I'd put it good use under my benching pot since it's a high leakage chip. biggrin.gif

@ Piccolo55:
I'm not really worried about wattage consumption personally but I do know for some it's the thing.
If running these at stock and nothing else the 8300 would be best but as you pointed out we all know you'd probrably not leave it there for long.
Haven't even taken either of these 8300's out of the box yet but will do that in a few minutes to get one into my DD as intended and of course run the crap out of the other on the benching rig.
Edited by Kryton - 6/19/16 at 4:59am
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post #34 of 34
Thread Starter 
Wel guys its ordered.

i went for the 8350 dont know why but i felt safer being at 4 ghz directly * im very unlucky with ocing -.-*.
and the x990 gigabyte plus a hyper 212x cooling

it should come in about 5 days ^^.
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