Asus M4A79T Deluxe Results and Help Required

[aussie7]

So I'm trying to overclock my AM3 system

Specs
Asus M4A79T Deluxe
2 x 4GB Gskill PC3-12800 F32133C9D-8GXL
AM3 965 Black Edition
Kingston SSD
ATI gpu PCI-E Radeon HD5670

So far I have the FSB upto 250FSB
- CPU 16.5 x 250 @ 4125Mhz 1.5v CPU_NB @ 1.35v NB @ 2000 HT 1750 Ram @1667Mhz
- CPU 16 x 255 is unstable even with CPU_NB @ 1.45v and lowered NB / HT / Ram @ 1333Mhz

I should note, that to get windows stable @ 250FSB I had to set the ram timings to manual as auto wouldn't boot

The cpu was working in an Gigabyte board with DDR2 at 270FSB so I know it can handle higher FSB

I have tried everything I can think of to get higher FSB with no luck, anyone got any tips

my bios pics settings

[aussie7]

Just an update

I had to bump the voltage upto 1.55v to get it stable in prime blend test
- CPU 16.5 x 250 @ 4125Mhz 1.55v CPU_NB @ 1.35v NB @ 2000 HT 1750 Ram @1667Mhz 1.7v

and I got 255fsb stable in prime blend test with the cpu volts up to 1.55v also
- CPU 16 x 255 @ 4080Mhz CPU_NB @ 1.35v and NB @ 2040 HT @ 1785 Ram @ 1700Mhz 1.7v

I also got about 5mins of prime blend test @ 16.5 x 255 @ 4210Mhz with the cpu volts upto 1.6v

I will have another go with a new 3000rpm fan on the thermaltake radiator and see how that goes

I should note that my system undervolts so 1.6v is like 1.55v

[Charles Wirth]

Might be close to your IMC limit, if you bring the memory ratio back one can you see if the fsb goes higher?

[AlleyViper]

Also, such tight TRAS and (mostly) TRC can hold you back (on some combos, a tight trc will require more vcore), and could be the reason you can't get a decent trcd and trp (but I'm afraid it's poor ddr3 ICs related), those sticks could behave badly over 1.60-1.65V.
Also, don't focus too much on your htt, remember to OC the cpu_nb to make use of >1600 ddr3. You'll need at very least 2400 to reap its gains, ideally ~2600 or above if your IMC is strong (for your current htt, that would be +2x, 2500 or 2510Mhz for starters). On games like assetto corsa, I get more fps per 200Mhz of CPU_NB than pure CPU clock.

[aussie7]

Thanks for the help

Might be close to your IMC limit, if you bring the memory ratio back one can you see if the fsb goes higher?

ok tried 260Mhz with lower settings for ram ht and nb, no luck won't boot at all

Also, such tight TRAS and (mostly) TRC can hold you back (on some combos, a tight trc will require more vcore), and could be the reason you can't get a decent trcd and trp (but I'm afraid it's poor ddr3 ICs related), those sticks could behave badly over 1.60-1.65V.
Also, don't focus too much on your htt, remember to OC the cpu_nb to make use of >1600 ddr3. You'll need at very least 2400 to reap its gains, ideally ~2600 or above if your IMC is strong (for your current htt, that would be +2x, 2500 or 2510Mhz for starters). On games like assetto corsa, I get more fps per 200Mhz of CPU_NB than pure CPU clock.

ok got CPU_NB upto 2550 and left HT at 1785 ram speed was reduced to 1360Mhz and passes 20min of Prime blend. With ram at 1700Mhz blend test fails after 8mins, probably needs more tweaking

[AlleyViper]

There should be no problem to keep HT one mult higher. 2040 is perfectly harmless and closer to stock (I usually run it at 2160 without a problem when paired with 240 htt), only values in the 2200-2400 range will start to degrade graphics performance in some scenarios, while having it too under 2000 will also cut bandwith and affect graphics negatively.

Some games will be afected by running mem at 1333, even at Cl6 vs something that should have been be slower like 1600 CL8 (IIRC, in my testing going from 1333 to 1600 with +1CL in AC is better than 100MHz on CPU). You should try to bring it nearer ~1600, even if you'll have to lower htt to use half mult higher on CPU. Again, don't be too much focused on the highest htt if it makes you lower ram too much, prioritize cpu_nb and memory speed around that ~4100 clock; 1.55V should be the limit before cpu starts degrading on a C3. Still, if you want to try RAM near 1700 (not every Deneb will like it), maybe try to relax tras to something much higher like 28-30 and trc to 36-40 to go easier on you cpu_nb.

Edit: Btw, it's normal that after changing CPU_NB mult upwards or some other secondary mults your MB will fail to boot once. You'll need to reset it once to proceed on normal boot. Happens both on my DFI 790FX and Asus 890GX (very similar bios options to yours).

Beware of temp walls for priming too. Random errors can start to appear in the 55-60C socket temp range (will depend on MB), and about 60-62 core temp (believe it or not, bios version can also change Core temp readings; pre Thuban bios for my 790FX that were tuned for Denebs will report about 2-3 C higher core than later ones for X6s). IIRC, most times lack of vcore under prime will show as a 0124 BSOD, while late thread rounding errors are usually cpu_nb voltage or mem timing related when near stable (instead of random bsods).

[Hell Hound]

Just an update

I had to bump the voltage upto 1.55v to get it stable in prime blend test
- CPU 16.5 x 250 @ 4125Mhz 1.55v CPU_NB @ 1.35v NB @ 2000 HT 1750 Ram @1667Mhz 1.7v

and I got 255fsb stable in prime blend test with the cpu volts up to 1.55v also
- CPU 16 x 255 @ 4080Mhz CPU_NB @ 1.35v and NB @ 2040 HT @ 1785 Ram @ 1700Mhz 1.7v

I also got about 5mins of prime blend test @ 16.5 x 255 @ 4210Mhz with the cpu volts upto 1.6v

I will have another go with a new 3000rpm fan on the thermaltake radiator and see how that goes

I should note that my system undervolts so 1.6v is like 1.55v

240(16.5)/250(16.5) or 267(15)/Fsb 275(15) or 228(18.5)

Whatever gives you 1.525-1.55 vcore under load

you need aod app to adjust core Vid-start @ 1.45 dont go past 1.525

lower Vdimm to 1.55-1.65

Cpunb @ 2.4ghz keep here raise Ram clocks instead

Raise NbHtt 1.3+ @ High Fsb/1.25 @ lower than 240

Ram is it ganged ? Try unganged

Raise Ohms yet ?

Dram term ?
Wrt ?
WCL ?
Row Refresh cycle ?

CpuVdda can help with 4.1-4.2ghz

Nbvid can help w/ Nb clocks and cache errors

[AlleyViper]

Btw, my daily for years (sig) on a nice 965BE C3 has been 240x16.5 (3960) with 1.4V under load (via +0.075V offset instead of direct P0 VID, so lower htt oc'd power states are kept stable), CPU_NB 2400 requiring only 1.133V, RAM at 1600 C7-8-7-24 1T Unganged with 1.5V (sticks can do 7-7-7-24 with more voltage, but isn't worth it). It's 24h prime stable, CnQ enabled.

By pushing some extra >150Mhz on CPU and >200MHz on CPU-NB has a huge toll on power consumption without great performance returns, making it hard to keep silent under 60C during summer with a >8h prime stable setting. Over 1,45V heat really kicks. Of course these aren't settings for the spirit of this forum, but for a decently cool+silent 24/7. Average C3s should require a bit more CPU_NB voltage for 2.4GHz @~4.0, but not much over 1.2V; >2600 could require a huge jump in voltage.

If you add a cheap second hand OC'd 7970/280X to your AM3 setup (provided you have a decent PSU), you'll be surprised at how many recent games it can still run decently. TBH, due to CPU bottleneck on racing sims, my RX480 isn't measurably faster than the Tahiti it replaced.

I'll attach for everyone rocking an AM3 a pdf with the multiplier sheet I've shared before (updated with 13X on NB/HT). It's handy to have while on a AWARD bios that doesn't do the math for you unlike the AMI above:

[Hell Hound]

I'm running GTX 980 @ 1500Mhz core 3800Mhz mem,w/ a 4ghz core 3ghz nb 2.5ghz HTT 1838c8 mem no bottleneck @ all
you Should be able to push a stock 1060 6gb w/ 4ghz cpu 2.4ghz nb and 1600c6 or 1866c9

[Hell Hound]

If you add a cheap second hand OC'd 7970/280X to your AM3 setup (provided you have a decent PSU), you'll be surprised at how many recent games it can still run decently. TBH, due to CPU bottleneck on racing sims, my RX480 isn't measurably faster than the Tahiti it replaced.

Your hitting the page file even though you have a 8gb gpu

My sys info shows

Total available Gpu mem : 20437
Dedicated vid mem : 4096
Sys vid mem : 0
Shared sys mem : 16341

My page file is 8gb

[AlleyViper]

Nah, not remotely related. That has to do with the lack of CPU performance on the single render thread, while other threads are occupied with physics and AI; the worst offenders being DX9 sims like R3E that will suffer on draw calls (NV cards in the same range are better with older cpus for this reason). Again, this is specific to racing simulators that depend a lot on IPC, without threading for graphics render (and can also perform subpar on moder CPUs for this reason). On FPS or more common AAA's that are less dependent on it, the 480 is noticeably faster than the Tahiti (it flies on Doom's Vulkan, where it doesn't tax the cpu), and fares better with gameworks tesselation on Witcher 3.

It's just that in games like R3E, Assetto Corsa, Dirt Rally, a PhII has a FPS wall due to cpu limitation, even if over it you can add graphics detail without performance loss on a stronger GPU. There will also be those busy AI moments on first lap (or stage parts in DR) were you'll have quick but ugly FPS dips, regardless of GPU or graphics settings due to lacking CPU performance, and the highest OC you can take out of a AM3 isn't enough to cope with it (and even respectable OC'd CPUs like a 2500K can still suffer). Still, a X6 vs a X4 like mine has the advantage of being able to deal with more AI cars on track in AC.
On a very draw calls heavy game like Deus Ex: MD this is noticeable too, with DX12 eliminating the lowest FPS dips in open zones due to limited CPU vs DX11 that performs considerably worse with a slower CPU. (but unfortunately Dx:MD's DX12 causes graphic glitches for both AMD and NV in some areas since W10 1703)

Btw, the recommendation above for a Tahiti was only due to the low price and respectable performance to pair it with an old PC, and because this is an AMD sub-forum. Otherwise, I'd suggest something like a 970/980/1060, or 290x/390/470/480/570/580 to fully enjoy current titles, but used GPU prices are a bit crazy at the moment.

[Hell Hound]

Around 15 fps diff @ some points

Ac
Forza Horizon 3
Project cars
BF4
Watch Dogs
GTA V





8GB vs 16GB
https://www.youtube.com/watch?v=7QBrMCRxRaw

Pumping Nb clocks w/ Ram gives massive bandwidth gain

I would shoot for 3.8core 2.8nb 1.8Htt 1667c7 lowest v. possible

[AlleyViper]

Sorry but that isn't the case in AC. What you see in that video is related to having a miserable single GB of gpu vram on a laptop, forcing a lot of texture swapping. I've experienced it, because I've been forced to use a 1GB 4890 back for a while, and it causes huge fps dips when many new lods with higher resolution maps come into view. For that reason 6GB ram isn't enough for the OS, game and extra shared video ram + whatever he's running on the background.

With stock content, 2-4GB vram are required to avoid vram related stutters. AC can't fill 8GB ram under normal conditions unless you set enormous replay files, for long it had only a 32bit executable due to no need to allocate more than 4GB in regular use. It never required much ram, a regular challenge with 15-21 cars will only use about 2-2,5GB of ram. And yes, the greatest gains on AC with a phenom II after you set it to ~4.0 are on ram and cpu_nb speed, but after the jump from 1333/2.0 to 1600/2.4 they start to be imperceptible.

[Hell Hound]

I thought perf cap was 1866 for x4 and 2000 for x6

4.0c 2.6nb should be doable w/ that 2133c9 kit

[aussie7]

Thanks everyone, I will read all the posts and respond later today, been catching up on sleep

atm I have gone back to 16.5 x 250 4125Mhz cpu 1.55v nb 1.35v ht 2000Mhz nb 2500Mhz

due to heat reasons. Have ordered a new fan for my radiator and will try higher when it arrives

[Hell Hound]

Can you try 228 x 18 NB 11X and Htt @ 9x Dram @ 1824

[AlleyViper]

OP is on a Asus M4A79T Deluxe (790FX/SB750), old 700 series can be limiting on ram speeds. IIRC, a later 890GX/FX can allow some extra 50-150MHz with the same C2's or C3s when compared to first gen boards.

[Hell Hound]

M4A79T Deluxe W/ G.skill ram aswell Look

AMD Phneom II X6 with M4A79T Deluxe , do my best to improve tRCD timing DDR3-1800 7-8-7-24 ,


Pass Hyper PI 32M


Pass MemTest 700%

[AlleyViper]

Sorry, the first numbers that come to my mind with 700 series boards, are those with early bios and 955 C2s (as the combo I had back in 2009), which were way more limited. Those are amazing results.

If you check CPU-Z, you'll see TRC at a very high 40 to help that Thuban IMC on 1Gbit Elpida BBSE (or other very similar Elpida IC). OP has it at 26, which is very tight and could be giving him trouble to push more MHz (excessive voltage too). Btw, @OP if you tell us the first 8 digits on the serial of your sticks and peek if they are single or double sided, one more knowledgeable of 2Gbit or 4Gbit ICs could tell you what timings and voltage to expect at your targets.

[Hell Hound]

@ 1T though ,I was going to get the 32gb version of op sticks (Actually Trident x)

[aussie7]

Hello everyone

First up I want to say thanks to AlleyViper for supplying the AMD multiplyer spreadsheet, very helpful

I have received my new 120mm 3000rpm fan today and fitted it

today I have tried

failed prime blend
- 16.5 x 255 @ 4207Mhz which failed prime blend after 12min
- settings 1.65v CPU and 1.35v NB Ram is 1360 and HT 1785 and NB 2040

successful prime blend
- 16.5 x 254 @ 4191Mhz which is still running prime blend after 25min
- voltage is 1.6v CPU and 1.35v NB Ram is 1355Mhz @ 1.7v and HT 1778 and NB 2032

- 17.5 x 240 @ 4200Mhz passed 30mins of prime blend
- voltage is 1.6v CPU and 1.35v NB Ram is 1600Mhz @ 1.7v and HT 1680 and NB 1920

- 17.5 x 240 @ 4200Mhz passed 30mins of prime blend cpu temp high is 67c
- voltage is 1.6v CPU and 1.35v NB Ram is 1600Mhz @ 1.66v and HT 1920 and NB 2640

[AlleyViper]

Do you really require CPU_NB voltage so high if you're not pushing those clocks? Even for the last bench at 2640 it's possible that you don't even need 1.3V, while for those at ~2000 something way lower as 1.15-1.25V might suffice. If you're over 1,55V at load, there's a big chance you're already damaging the CPU. Your previous 16.5 x 250 4125Mhz cpu 1.55v nb 1.35v ht 2000Mhz nb 2500Mhz is imho a better balanced daily setting, if it's prime stable (and cpu_nb voltage could be further reduced too). Just compare them in cinebench r15, and the 4125/2500/1666 might be near the same as ~4200/~2000/1600.
Same with ram, if you're at CL9 with relaxed trcd and trp for 1600 it might not require more than 1,55V.
CPU_NB voltage can contribute a lot to high temps, even though the amount required varies from CPU to CPU (my C3 will only require under 1.150V for 2600 @~4.0GHz, while my C2 needs about 1.275V for 2600 at only 3.7 GHz in the same 790FX, while in a 890GX it requires about 1.2375V); higher CPU_NB speeds (and ram amounts or very tight timings) require raising its voltage, while higher CPU clocks at same nb_cpu speed usually require smaller voltage increases.

[aussie7]

ok I tried the following

failed prime blend after 12 mins
- 17.5 x 240 @ 4200Mhz
- voltage is 1.55v CPU and 1.25v NB Ram is 1600Mhz @ 1.66v and HT 1920 and NB 2640

passed prime blend 30 mins stable
- 17.5 x 240 @ 4200Mhz cpu temp high is 63c
- voltage is 1.55v CPU and 1.3v NB Ram is 1600Mhz @ 1.66v and HT 1920 and NB 2640
- my board under volts so for CPU 1.55v they are between 1.466v and 1.516v

[Hell Hound]

ok I tried the following

failed prime blend after 12 mins
- 17.5 x 240 @ 4200Mhz
- voltage is 1.55v CPU and 1.25v NB Ram is 1600Mhz @ 1.66v and HT 1920 and NB 2640

passed prime blend 30 mins stable
- 17.5 x 240 @ 4200Mhz cpu temp high is 63c
- voltage is 1.55v CPU and 1.3v NB Ram is 1600Mhz @ 1.66v and HT 1920 and NB 2640
- my board under volts so for CPU 1.55v they are between 1.466v and 1.516v

Does the board see the XMP profile,
return cpu to default settings
Docp will tell you what fsb is needed for each step
Once you config memory then clock Nb,then clock the cpu
The High Ht clocks is needed when using mobo full tilt(maxing out components like hdd,usb and vga)

[aussie7]

Does the board see the XMP profile,
return cpu to default settings
Docp will tell you what fsb is needed for each step
Once you config memory then clock Nb,then clock the cpu
The High Ht clocks is needed when using mobo full tilt(maxing out components like hdd,usb and vga)

It's been a long time since I've had a go at overclocking, can you explain what XMP profile and Docp is ?

TIA