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The 1055T Owners Club

post #1 of 5036
Thread Starter 

Welcome! Thought I'd start a thread for us, seeing as how they were just released. Mine should be in the mail tomorrow (1055T). So here's the thread for everyone to discuss them and their respective overclocks.

Now, the real trick may be getting it to run on my Gigabyte 790X board...

Google Spreadsheet

Updated: I'd like to keep people's 24/7 OCs on here, so if you have one, drop it and I'll add it.

How do I overclock my 1055T?

First off: make sure you have adequate cooling! The on-die CPU sensor is not accurate and tends to be roughly 10C below the temperatures read at the motherboard socket. The temperature max listed by AMD is 62C, but with the inaccuracy of the on-die sensor, it's hard to say exactly. They tend to run more stable than other older Phenom II at higher temperatures.

More on the motherboard socket and CPU temperature diodes:
Quote:
All modern processors incorporate an internal thermal diode that can be read by the motherboards' BIOS. While this diode and the motherboard are not calibrated and therefore may not display the actual true temperature, the error is constant. This means that if the diode reports 40°C when it is actually 43°C, then it will also report 60°C when it is truly 63°C. Since the design goal of a thermal solution is to keep the CPU core within allowable temperatures, a processor's internal diode is the most valid means of comparison between different heatsinks, or thermal compounds. The diode and motherboard may be incorrect by a small margin in relation to an actual calibrated temperature sensor, but they will be consistent in their margin of error every time.
http://benchmarkreviews.com/index.ph...1&limitstart=8

My personal experience with the 1055T is that you the socket temperature is not perfectly accurate from disproportionalities between the socket and CPU temperatures with different air cooler and water cooling and from attempting to get a direct temperature reading with a thermal diode from a multimeter. The correct temperature for your CPU is probably somewhere between the core and the motherboard socket temperatures is my best guess.

The maximum voltage listed by AMD is 1.400v, but this also doesn't make a lot of sense as the stock voltage is 1.375v and the Turbo Core voltage 1.475v. So, the maximum voltage is probably somewhere up around 1.500v, since that's what it would hit with Turbo Core anyway.

In the BIOS (which you can enter on many motherboard by pressing DEL on startup; see your startup screen):

1. Lock PCI-e bus at 100mhz (most boards do this automatically).
2. Disable Turbo Core and Cool'N'Quiet. Note: These chips also have a hardware form of CnQ that is not able to be disabled on some motherboards. However, this does not seem to have any impact on overclocks, so if you processor drops multiplier/vCore when idle, don't worry.
3. Raise FSB to and adjust multiplier to whatever speed you want for the processor (final speed = FSB * multiplier).
4. Raise the CPU vCore (my chip does 3.6GHz at 1.35v, 3.8GHz at 1.42v and 4GHz at 1.475v).
5. Drop northbridge multiplier and the hypertransport multiplier. The stock value is 10x/2000MHz for both (sometimes listed as only 2000MHz in the BIOS). The BIOS setting always represents the multiplier and not a final speed (eg, 1800MHz would be a 9x multiplier). Some people have stated that an overvoltage/overclock on the CPU northbridge is necessary to obtain high overclocks on the cores, but I have not found this to be the case with my CPU. There may be enhanced data transfers rates at higher NB clocks/volts, but I failed to see a lot of real world benefit in it when testing CPU heavy benchmarks. However, it is known that games can benefit from higher CPU-NB clocks, up to 15% or so around 3000MHz. For other applications like video encoding, it at best it would be a few percent difference. The stock voltage for the CPU-NB is usually 1.225v.
6. Drop RAM divider (EG instead of 1600MHz choose 1066MHz/1333MHz for DDR3 or 533MHz/666MHz/800MHz for DDR2). While the dividers are always listed in speeds, they also represent a divider, much like the HT/NB represents a multiplier in the BIOS. For instance, on a DDR-3 Board 1600MHz is actually a 1:4 FSB:RAM ratio (for 800MHz, 1600MHz effective). Divide the RAM speed by the base clock (200MHz) to figure out what the ratio actually is. Some motherboard models, especially those based on the 790X chipsets, have trouble booting at stock speeds, so if you fail to boot after attempting an overclock, attempt to underclock the RAM and see if that alleviates the problem.

So, I've booted up to Windows okay, now what?
Stability test! I recommend running 12 hours of Prime95-32/Prime95-64 and LinX at the same time. In my experience, if it survives that, it'll survive anything. Be sure to monitor your temperatures as well, with recommended programs being Everest, CoreTemp or SpeedFan.

The following settings with Prime95 will generate the most heat, if you're trying to figure out the greatest temperature your processor will ever reach: FFT size 24-32Kb, in-place

I'm having trouble hitting 4GHz or more and getting my system stable, what should I do?
Try bumping the multiplier of the northbridge so that the speed is at 2400MHz-3000MHz and setting the CPU-NB voltage to around 1.300v to 1.400v. Some people need this to be able to hit the higher clock speeds stably.

My motherboard with onboard video does not seem to overclock at all!
Sometimes the reference clock of the onboard GPU is based on the FSB. Try either locking the speed of the onboard GPU or disabling the onboard GPU in the BIOS.

How do I become a member of the club?
Simply fill out the following with the information from your stable clocks:
FSB/Multiplier:
CPU Speed:
NB Speed:
CPU Voltage:
CPU-NB Voltage:
RAM Speed:
Motherboard:
Model: (125w or 95w)


Why have I not been added to the list yet?
I add new members when I have time, usually once every 2-3 weeks. Rest assured that if you have your entry in the above format in this thread, it will eventually be added.
Edited by test tube - 1/7/11 at 12:17pm
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post #2 of 5036
I'm getting my meat hooks on one tomorrow morning, I'll join the club thanks.
    
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post #3 of 5036
Mine's still "Charged" on Newegg but should ship tomorrow =]
Coming from NJ to VA so shouldn't be long.
Will be basking in 1090t glory
Waiting on X399
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Waiting on X399
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post #4 of 5036
mines coming...ordered it today..should be here in 3 days...
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Sandy Bridge E
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post #5 of 5036
Ordered a 1055T from Newegg as soon I saw it was up.
post #6 of 5036
P.S. Has anyone found the official specs on these, such as max recommended volts, temp, etc.? I don't see anything on AMD's website, unless I'm not looking in the right spot.
post #7 of 5036
Max Temp is 62c

Lots of operating specs here.
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post #8 of 5036
Thuban Thuban Thuban!
post #9 of 5036
Looks like it's time to sell the ol' 720.
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post #10 of 5036
Quote:
Originally Posted by richierich1212 View Post
Thuban Thuban Thuban!
I clicked the link and it says 1.4v max. I noticed in your sig it says you have yours at 1.52. Isn't that going to kill it? I'm 100% new to AMD BTW...
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