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CPU-Z Validation
Got around to overclocking my unlockable Phenom II 960T on my previously featured ASUS M4A89GTD Pro/USB3. Voltage regulation on this board isn't the worst I've seen, but I wouldn't call it great. However I suppose this is one of the higher-power draw scenarios that this VRM may ever face (highest would prob be an FX-8100) so that's worth considering. vCore fluctuated by about 40mv during testing, at idle it was typically closer to 1.535-1.55v and under load 1.55-1.575 (with approx. 1.575v set in BIOS, & LLC enabled). CPU/NB was set to 1.45v, this sample hates 2800MHz uncore so I kept it around 2700MHz. The best I achieved was 4.177GHz on all 6 cores, not too shabby. There are two problems that I have with the overclocking on this board:
1. BCLK is absolutely never what you set, under any circumstance. Yes, spread spectrum is turned off for all applicable components... and it's far more severe than that anyway, deviating by anywhere from +4MHz to +0.7MHz BCLK (power cycle causes the deviation to shift).
2. vCore and CPU/NB voltages are set via offset, no option to change that. Annoying, but the BIOS at least will tell you what voltage you're currently at so you can go from there.
~
I also cleaned up, repasted and overclocked a bit using this ASUS M4N98TD Evo, but was confronted with a bigger roadblock than on the board before, that being very poor voltage regulation. It's a keeper still, this has the 980a chipset which was nVidia's last for AMD, and as far as I can tell, overall. It's basically the 780a rebranded, main difference being that most boards with the 980a use DDR3.
This is as the board came in, with some dust across the board that may not be easily visible on camera and what I'm pretty sure are Noctua AM3 mounting brackets. Also a small detail, it seems the previous owner decided the CPU fan header needed to be reversible (??), so the plastic guide is missing there.
There is a highly technical term I've heard a couple of times to describe the NB temperature in this picture: "not good."
Well, here's why. Whatever thermal interface once existed is now a dry yellow splotch, and will not come off in this century. I put MX-2 on top of it in the hopes that it'd suffice, and do that it did!
Ahhh... much better.
Marketing claims that this is a 8-phase, I personally think this is a 4+1 phase VRM with 2 high, 2 low side MOSFETs, 2 inductors/phase? I don't fully understand VRMs, this is one of my weakest areas, so if anyone knows what they're talking about I'd love to hear your opinion on this.
As it came out. I stole some AM3 brackets from my nuked MSI VRM fail edition 970 board
I assume that stock, it would have had the classic round mount. I gave the whole surface a light brushing, and blasted it with an air duster front and back, plus the heatsink assembly separately. A couple fins on the VRM were very slightly bent, so I tried to straighten those out too.
This board refuses to post with any 8GB DIMM that I have, so I've been running it mainly with my Kingston HyperX Genesis 2x4GB kit.
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CPU-Z Validation
For this motherboard, I decided to try and unlock my Phenom II 555 BE. Indeed, this board was able to get all 4 physical cores up and running. One small annoyance is that while this board does have NVCC and therefore core unlock, you can't choose which cores you want active, it's all of them or stock only. Core #3 is the worst on this CPU, always giving up earliest, so I would have liked to disable it to try for a 3-core higher OC. The M4A89GTD Pro/USB3 allows per-core enabling/disabling in BIOS.
Voltage regulation, as I mentioned before, is bad. I started out with that same PhII 960T BE as the beginning of this post, and voltage was immediately -25mv from what I set, and then -60mv from there. Rough. Then of course, the Phenom II X4 B55, which I hoped would be a bit better... nope, in fact it's virtually the same. The above image is with 1.65v vCore set, 1.5v CPU/NB, 1.4v LDT/HT Voltage, stock 980a chipset and NF200 voltages (1.1v and 1.2v respectively). This sample seems to be kind of crappy, even though it's a C3 revision all 4 cores top out at 3.8GHz (4.0GHz was bootable, but quickly problematic). I bet that with disabling core #3 on a board with better voltage regulation, 4.0GHz stable might be within reach for this CPU.
Despite my complaints, again, this board is a keeper, if only for that low-effort 980a...