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Which PSU should I buy?

Started by wiredmarlin5 · · 👁 85 views · 2.2K replies

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crimsonstag84 crimsonstag84 Regular
518 messages
joined Jun 2010
#1541 ·
Whatever you do, don't leave the CPU VCore or the CPU PLL Voltage on Auto settings.

It’s also pretty strange—you should be hitting over 4GHz at just 1.3V without seeing temperatures like that.
David Sanders4 David Sanders4 Member
47 messages
joined Feb 2015
#1542 ·
I just disabled the turbo boost... running OCCT at 100% CPU load, the CPU temperature hit 80°C on HWM, while the motherboard reached 93°C. The fan speed was also sitting at either 100% or 65%, and the CPU Vcore didn't climb past 1.2V.
Kimberly Gomez34 Kimberly Gomez34 Regular
686 messages
joined Jul 2009
#1543 ·
Something isn't adding up here. You need to disable several other settings—specifically C&C, C1E, and C6. I’d highly recommend watching a quick tutorial on this. Also, take some time to browse through the existing threads and double-check your BIOS settings.

With that motherboard and cooler, you have more than enough headroom for a serious overclock. You should easily be hitting 4.3–4.5 GHz while staying well under 60°C.

To give you an idea, look at Tom's setup: an FX 8370e paired with a Shadow Rock Slim cooler and a 990FX chipset.

The core voltage at 4.5 GHz was set to 1.315 V in the BIOS, resulting in an actual reading of 1.26 V.

Check HW Monitor.

http://imageshack.com/a/img909/1337/dSysCY.jpg
David Sanders4 David Sanders4 Member
47 messages
joined Feb 2015
#1544 ·
I’ll give it a shot... At first, I was worried I hadn't applied the thermal paste correctly or that it wasn't seated quite right, but then I noticed my motherboard temps were hitting some pretty high numbers. I remember watching a tutorial where they mentioned this specific board had some serious throttling issues, yet when I look at other videos, people using much cheaper boards seem to be pulling better overclocking results than I am.
On the plus side, the readings from HWM align perfectly with what I'm seeing on OCCT and Easy Tune, though for the life of me, I can't figure out why the BIOS values are consistently about 0.1 higher. 🤷
Larry Ortiz5 Larry Ortiz5 Regular
710 messages
joined May 2020
#1545 ·
Some guy comes crawling in asking for advice, and then—out of nowhere—he starts getting insulting. To make matters worse, he put together a PC that’s basically held together by duct tape and prayers. 😵
Kimberly Gomez34 Kimberly Gomez34 Regular
686 messages
joined Jul 2009
#1546 ·
David Sanders4 said:I honestly have no clue why the BIOS would be off by a full 0.1. 🤷

A moderate voltage drop or an overvolt isn't unheard of—I always suggest checking out a few tutorials—but seeing a shift across the entire first decimal point is definitely not standard. If I set it to 1.35V and it drops to 1.25V or spikes to 1.45V, that’s just way too much fluctuation.

Enable LLC
David Sanders4 David Sanders4 Member
47 messages
joined Feb 2015
#1547 ·
I have my Vcore set to 1.35V in the BIOS, but the system won't even post at 4.5GHz... I can only get it to boot when I drop down to 4.3GHz.
Kimberly Gomez34 Kimberly Gomez34 Regular
686 messages
joined Jul 2009
#1548 ·
And what kind of voltage are you seeing in CPU-Z when you're running a stress test (like OCCT or Prime95)? I'd love to see the delta between having LLC enabled versus leaving it off.

Regardless, there's no way your temps should be hitting those levels with that specific cooler installed.
David Sanders4 David Sanders4 Member
47 messages
joined Feb 2015
#1549 ·
I’m seeing the exact same values in CPU-Z as I am in OCCT, and honestly, I’m a bit stumped...
Temp 78°C @ 4.3 GHz / 1.35V
Temp 79°C @ 3.3 GHz / 1.18V

The issue is that under a full load, it isn't actually maintaining that 4.3 GHz clock speed; instead, it keeps tapering off until it hits around 1.7 GHz...
David Sanders4 David Sanders4 Member
47 messages
joined Feb 2015
#1550 ·
I’ve finally identified the issue, though I can only conclude that I am officially the biggest idiot in history...🤦
Just facepalming at my own stupidity here...
Kimberly Gomez34 Kimberly Gomez34 Regular
686 messages
joined Jul 2009
#1551 ·
,1356

?

Regarding the clock speeds:

Thermal throttling is when the CPU overheats, the mobo sets its speed lower, so it can generate less heat and cool down.

I’d suggest brushing up on some tutorials; it looks like you’re trying to run before you can walk when it comes to overclocking.

Regardless, those temperatures are absolutely insane. You can tell by the erratic voltage drops that nothing is lining up here. Are you 100% certain the cooler is seated properly? Check if the fan is actually spinning, or if you've used way too much—or not nearly enough—thermal paste.
David Sanders4 David Sanders4 Member
47 messages
joined Feb 2015
#1552 ·
Timothy Kim60 said:?

On a different note regarding the clock speeds:

I’d suggest brushing up on some tutorials; it feels like you're jumping from zero to sixty without checking the brakes first...

Either way, those temperatures are completely irrational. You can tell by the erratic voltage swings that something is fundamentally off. Are you absolutely certain the cooler is seated properly? Check if the fan is actually spinning, or if you've applied too much—or too little—thermal paste...

Turns out I was the idiot here—I forgot to peel the plastic off the heatsink.😵

I just pulled it off, and now at 4.5 GHz with 1.35V, OCCT shows it fluctuating between 4.5 and 2.9 GHz, with the voltage bouncing between 1.35V and 1.26V. That’s likely just the motherboard hitting its limits, but thank God the temperature hasn't crossed 42 degrees yet...
My heart is finally starting to settle down...
Kimberly Gomez34 Kimberly Gomez34 Regular
686 messages
joined Jul 2009
#1553 ·
That isn't a motherboard limitation. You haven't enabled all the necessary overclocking features in the BIOS yet—specifically regarding Thermal throttling. During a proper stress test, your clock speeds should remain pegged at the maximum consistently. That fluctuation you're seeing in voltage is likely just the system dropping the voltage as the thermal throttling kicks in and throttles the clocks. It doesn't look like classic overvolting or voltage sag; it’s much more significant than that.

You can't take a half-measure approach like this. Based on that cooler and your motherboard, I think that CPU could actually perform quite impressively without even breaking 60°C during a multi-hour stress test.
Robert Rodriguez2 Robert Rodriguez2 Regular
353 messages
joined Jul 2015
#1554 ·
Timothy Kim60 said:That’s not a motherboard limit. You probably haven't even disabled all the BIOS settings needed for OC (clearly including Thermal throttling) — during a stress test, your clock speed should stay pegged at the max. That might be why your voltage is jumping around; it drops when thermal throttling kicks in and drags the clock down. This isn't your typical overvolting or voltage drop—it's way too much

You can't do things halfway. Honestly, with that cooler and board combo, that CPU could perform pretty damn well without even breaking 140F during a few hours of heavy stress testing.

Bet he didn't even peel the plastic off the cooler jacket😁
Kimberly Gomez34 Kimberly Gomez34 Regular
686 messages
joined Jul 2009
#1555 ·
Basically, the plastic film on the cooler had this nasty smell 😬

Man, I'm just glad it didn't fry my CPU 😬

It was obvious from the temps that something was seriously off; there's no way I'd be seeing numbers like that with a decent cooler
mellowtiger83 mellowtiger83 Regular
466 messages
joined Aug 2014
#1556 ·
These aren't facts. Honestly, it’s a miracle the whole thing even held up, haha.
Kimberly Gomez34 Kimberly Gomez34 Regular
686 messages
joined Jul 2009
#1557 ·
There you have it. And then they claim AMD runs "hot." 😬

David Sanders4: song
David Sanders4 David Sanders4 Member
47 messages
joined Feb 2015
#1558 ·
@Timothy Kim60/">@@Timothy Kim60, thanks for the help 🙂
You were right—my settings weren't quite dialed in. I'm not entirely sure how much of an impact LLC makes yet, but I’ve left it on extreme for now (I might play around with it more to see what happens). For the most part, the frequency was fluctuating because I hadn't enabled HPM. I also dropped the voltage slightly and ran it for about 15 minutes; the voltage fluctuates a bit, though that could be down to the PSU. Temperatures stayed under 51°C overall.

I suspect that with this cooler at room temperature, I could probably push it to 4.8 GHz without crossing 60°C... but there's really no point. A single GTX 660 doesn't need that kind of power, and a stable 3.5 GHz is more than enough for it. Once we move to an SLI setup, then we'll see...

That said, this is the last time I'm dealing with an air cooler. What a headache to strip everything down just to get it out of a mid-tower case, only to have the cooler barely fit once you close the side panel.
The worst part is when you miss a connector, carefully seat the motherboard, and then realize you can't actually reach the plug with your fingers. Then you're stuck hunting for some tiny precision screwdriver, and it's infuriating. To top it all off, you end up making an epic blunder and forget to peel off the plastic film on the base.😵
Kimberly Gomez34 Kimberly Gomez34 Regular
686 messages
joined Jul 2009
#1559 ·
LLC stabilizes your CPU voltage (comparing what you set in the BIOS against what CPU-Z shows under load during a stress test)—but because of that, it also bumps up your temps slightly. You really need to play around with it and test to find that sweet spot, especially with high-end boards that offer different stages like high, medium, etc.

Generally speaking, it helps, but if the voltage isn't dropping, then LLC isn't doing much for you. For example, here is a rare case where LLC didn't help at all:
http://forum.pcekspert.com/showpost....0&postcount=94

There's no real need for just one GTX 660; having a stable 3.5 is more than enough for it, but once they go SLI, we'll see...

You might actually see some benefits in those strictly single-threaded games that don't play nice with AMD, even with that card (like World of Tanks, Rome TW, etc.). Since you picked up that CPU, motherboard, and cooler, it would be a shame not to push it past 4GHz—even by a few hundred MHz. Those newer Visheras (8320e, 8370, 8370e) seem to be absolute beasts when it comes to overclocking (they require less voltage for a given clock speed, which means even better temps).

My FX8320E holds 4.1 GHz at 1.2vcore.
For an FX8370, I need 1.39vcore for 4.9GHz, but it holds 4.4 at 1.2625v.

Check out the results from Hawker:
http://forum.pcekspert.com/showthrea...=262724&page=7

Sure, he’s using high-end cooling and a premium motherboard, but those results and temperatures are insanely good...

As for coolers—honestly, forget liquid cooling; air coolers are much more cost-effective. That’s the other issue with the cooler you bought—it isn't a great value. It’s more expensive than a Noctua NH-D14, yet it performs worse.
David Sanders4 David Sanders4 Member
47 messages
joined Feb 2015
#1560 ·
Timothy Kim60 said:Using an LLC setting stabilizes the processor voltage—you can see the difference by comparing your BIOS settings against what CPU-Z reports during a heavy stress test. The trade-off, however, is that it tends to bump up your temperatures slightly. It’s definitely something you need to play around with; I’ve found it’s worth running a few tests to hunt down that perfect sweet spot, especially on those high-end boards that offer multiple stages like high or medium settings.

It generally helps, but if you aren't seeing any voltage drops, then LLC isn't really doing much for you. Here is a rare instance where I found LLC to be pretty much useless:
I’ve been looking over the benchmarks again, and I have to admit, I might have been a little too optimistic about how much headroom we actually had. It turns out that even with an upgrade, some of these older components just can't keep pace with modern demands. Regarding what Timothy Kim60 mentioned earlier, I think there's a valid point there about thermal throttling. It's easy to forget how much heat builds up when you're pushing hardware like this through a heavy Crysis 3 benchmark. Even with a decent setup, if the cooling isn't perfectly dialed in, you're going to see those numbers dip. I also noticed David Sanders4 brought up the power draw. It’s a fair observation. When you're running a GTX 680 alongside more modern parts, you really start to feel the strain on the PSU. It’s one of those things you don't realize is an issue until you're staring at a system crash during a stress test. Anyway, I'll keep tweaking the settings and see if I can find a more stable middle ground. It’s a bit of a balancing act, isn't it?

The real issue is that if you actually want reliable data, you need to run every single test for at least 45 minutes. That requires a level of patience I just don't seem to possess. Personally, I’ve been capping my runs at about 15 minutes before I start yawning while waiting for the results to pop up.

Timothy Kim60 said:You might actually see some real benefits in those heavy single-threaded titles that don't play particularly nice with AMD hardware—even when you're running a card like the GTX 660—think stuff like World of Tanks or Rome: Total War. Given the CPU, motherboard, and the Coolermaster Nepton 280 l Quote setup you picked up, it feels like a missed opportunity not to push it past 4GHz. Even a modest bump of a few hundred MHz would be worth the effort. It looks like those newer Vishera chips (the 8320e, 8370, and 8370e) are much more aggressive overclockers; they seem to require less voltage to hit higher clock speeds, which keeps temperatures much more manageable.

I think I'll stick with 4500 MHz. I’m going to try nudging the voltage down just a hair more, though. During my last round of testing, I dropped it by 50mV, so I plan to take it slow this time. Honestly, my heart skips a beat every time I see a Blue Screen of Death.

Timothy Kim60 said:Check out these results from Hawker:
I’ve been following this thread for a while now, and I have to say, seeing how much things change over time is pretty fascinating. It feels like just yesterday we were all arguing about whether a specific GPU could even handle basic tasks, and now we’re looking at benchmarks that seem almost impossible. Regarding the points made by David Sanders4, I think there’s some merit to his skepticism, though perhaps he's being a bit too cautious. We've seen hardware perform significantly better than the initial projections suggested in the past. Still, I can see why one might hesitate to jump in without more data. As for what Timothy Kim60 mentioned earlier, I find myself agreeing with the general sentiment. It's easy to get caught up in the hype, but if you look at the actual performance metrics, the reality is often a bit more grounded—sometimes a little too grounded, if you ask me. It’s an interesting time to be keeping an eye on these developments. There's always someone convinced we've hit a plateau, only for a new release to completely shift the goalposts. I'll be curious to see how the community reacts once the next round of official testing is out.
Sure, the cooling setup and motherboard are top-tier, but honestly, those results and temperatures are just unreal.

I’ve been reading through this thread, and I honestly can't find any mention of which cooler is actually being used here. One thing that did catch my eye, though—did anyone else notice that once everything was set up, they turned on CnQ?
Timothy Kim60 said:Regarding coolers—honestly, forget about liquid cooling. Air coolers are just much better value for your money. That’s my second point about the one you picked: it isn't really worth the investment. It actually costs more than a Noctua NH-D14, yet it performs worse.

I ended up grabbing everything they had listed in the link since the bundle was such a steal. It included an FX370e, a Ga-990xa-ud3, 2x4GB HyperX Black Fury DDR3 at 1866MHz, a 120GB Samsung EVO 840 SSD, an LCPOWER 975Gaming B-Wing (which is definitely the weak link here), and a V8GTS. I have to admit, the V8GTS caught my eye mostly because of its looks, though on paper it boasts 160,000 operating hours and self-lubricating bearings.🤣 I also took a look at this review which made it seem like a pretty decent option. All in all, the total came to $1333, so I’m feeling pretty good about snagging this deal from a budget online retailer!

If I were picking based purely on ease of installation and better space management, I'd probably go with the AIO...

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