• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

How to overclock a 7850 past 1050MHz?

♥
dhill said:
Am hoping that someone may be able to help me out with a small problem that Im currently experiencing.

Ive just put together a new build this week, spec below:

Motherboard: Gigabyte z77x-ud5h
CPU: i5 2500k
CPU Cooler: Antec Kuhler H2O 920
Ram: Kingston HyperX 8Gb 2133Mhz DDR3 (2x4Gb)
Graphics: Sapphire Radeon HD 7850 OC 2Gb GDDR5
HDD: 2x Seagate Barracuda 1Tb SATA 6Gb/s (ST1000DM003)
Optical drive: LG BH10LS38 Super Multi Blue
PSU: Coolermaster Silent Pro M2 850w
Case: Antec Three Hundred Two
Case fans: 4x Antec True Quiet 120mm (low speed - [email protected], high speed - [email protected])
OS: Windows 7 64bit

Im running the following m'board BIOS - F11, and the CPU is overclocked to 4.5Ghz as follows :

CPU Vcore - 1.335v
VTT - 1.060v
PLL - 1.810v
BCLK - 100.1
Vcore load line calibration - Extreme


Im running Catalyst v12.6 (I have activated AMD Overdrive via the Catalyst drivers) and using Asus GPU Tweak v2.1.7.1 (I have ticked GPU voltage and Overclocking range enhancement) and trying to benchmark the GPU using Heaven 3.0.

The base clocks for the GPU are:
GPU Clock - 920Mhz
GPU Voltage - 1138mV
Memory Clock - 5000Mhz
Fan speed - Auto

Now the problem Im having is that when ever I try to overclock the GPU, Heaven either refuses to get past the loading screen once you hit play or it starts the benchmark and after a couple of seconds Heaven locks up.

I will admit that Ive not tried any gradual setting changes, and jumped straight into the following:

GPU Clock - 1200Mhz
GPU Voltage - 1138mV
Memory Clock - 5800Mhz

I have no idea what Im doing or not doing wrong, and would appreciate any advice/ help as I would love to OC this card as I know that there are potential some huge gains to have from it.
Click to expand...

Try Asus GPU Tweak version 2.0.6 instead. Although 2.1.7.1 is a version I've not tried yet, other versions inbetween had issues. And if you still have problems revert to Catalyst 12.3. And if you still have problems choose a gpu clock speed that requires less or equal to default voltage, since I suspect it's the voltages not getting applied correctly.

I'm still working on 100% stability for myself tbh, but this is the best combo I have so far. After all the game testing at my current speeds I was left having a problem with GPU accelerated rendering in sony vegas, that appears to have been solved by another slight bump in voltage.

Currently
1200Mhz Core
1450Mhz Mem
1.210 Volts☺

I'm also yet to try 12.6 official and 12.7b. 12.5b and 12.6b were very unstable all round for me, bsods on idle, crashing on games at clocks I'd previously found to be stable etc, so I don't hold out much hope. Roll on 12..8 mega driver or something :)

I'll do some more video render/gaming tests on 2.0.6 and maybe try 2.1.7.1 tommorow to see what problems if has.
 
Last edited:
centy said:
♥

Try Asus GPU Tweak version 2.0.6 instead. Although 2.1.7.1 is a version I've not tried yet, other versions inbetween had issues. And if you still have problems revert to Catalyst 12.3.
Click to expand...

I'll give Asus GPU Tweak version 2.0.6 & Catalyst 12.3 a go tonight and see how I get on as it seems that my overclock is perfectly happy in Heaven, but as soon as I try 3D Mark or try to play games my screen turns a nice yellow/green colour with lots of vertical lines on it :(
 
555BUK said:
Make sure you have the PCI-E plug fully inserted (check both ends if PSU is modular). Also try a different output on the card.
Click to expand...

Have done so, but to no avail. Stuck in my old X1300 Pro and it worked straight off so the sooner I can get this card RMA'd the better, no that I don't have it working I really want to play some games!
 
Is it really worth having that high an overclock with 100% fan profile?

I game with headphones and mine is set to 60% at maximum which brings crossfire temps at 70 MAX under load.
 
AMD will need to hide ASIC quality pretty soon, in order to prevent so many DSR returns. Imagine selling cars with individual quality ratings for the engines. Who would buy a 60%'er?
 
MartynB85 said:
So guys what are the best 7850's, is it just a lottery whether you get a good clocker or not?

I guess the cooler on these is quite good? http://www.overclockers.co.uk/showproduct.php?prodid=GX-295-SP

cheers
Click to expand...
It's a total lottery. The cheapest 7850 I have purchased (Powercolor refernce) had an 85% ASIC and overclocked lke a chanp, yet my most expensive 7850 (MSI TFIII) was an utter stinker. I have now owned 4 7850's and there is no way to seperate good from bad without first installing them.

ASIC quality is key when it comes to overclocks and cool running. My reference Powercolor card with 85% ASIC and 1.050v stock volts ran cooler than the TFIII card with it's superior heatsink but default voltage of 1.21v. Of course, a crappy ASIC may go further with good cooling but it is just polishing the turd.
 
So i might aswell buy the cheapest i can find, think i will end up with the Sapphire thats on offer at the moment.
I had a HIS 7850, that wouldn't run at all with just clocking to the max in CCC, and would hit nearly 80'c....
 
Asus GPU Tweak 2.1.71 seems fine.
Gonna try official 12.6 release with it just for lulz. If I get any problems it's back to the 12.3's
 
Hi all.

I'm getting an MSI Twin Frozr 7850 next week with my z77 i5-3570k and will be overclocking for the very first time.

I just wanted to make sure my targets are realistic for 24/7 stable (depends on card how high you can go)

I've read that it's best to go up in 25mhz on each slider.

This is my target for 24/7 stable, would it shorten the life span of the card?

1200/5800Mhz
1.18v 24/7
Temps around 70c full load.

My PSU is a BeQuiet 630w, is this okay for OC'ing?
 
Speeedy said:
Hi all.

I'm getting an MSI Twin Frozr 7850 next week with my z77 i5-3570k and will be overclocking for the very first time.

I just wanted to make sure my targets are realistic for 24/7 stable (depends on card how high you can go)

I've read that it's best to go up in 25mhz on each slider.

This is my target for 24/7 stable, would it shorten the life span of the card?

1200/5800Mhz
1.18v 24/7
Temps around 70c full load.

My PSU is a BeQuiet 630w, is this okay for OC'ing?
Click to expand...

those are fine,but its all down to whether you recieve a good card or a poor clocking card,anything with 75% asic quality upwards is a decent card imo

i would leave memory clocks at stock and raise the core as high as you can,then move onto the memory clock
 
Speeedy said:
Hi all.

I'm getting an MSI Twin Frozr 7850 next week with my z77 i5-3570k and will be overclocking for the very first time.

I just wanted to make sure my targets are realistic for 24/7 stable (depends on card how high you can go)

I've read that it's best to go up in 25mhz on each slider.

This is my target for 24/7 stable, would it shorten the life span of the card?

1200/5800Mhz
1.18v 24/7
Temps around 70c full load.

My PSU is a BeQuiet 630w, is this okay for OC'ing?
Click to expand...

My MSI TF IV does 1200/5400 but only with 1.25V and even then it isn't totally stable. It also slows down if I raise the memory above 5400 at that core speed. Like the previous poster said, it depends how good your card is. I now have mine stable at 1150/5400, 1.225V. Can't tell the difference in games, lose about 3% in some benchmarks.
 
Yeah I understand it depends on what card you get, so basically what voltage would you say is the maximum for 24/7 operation without killing my GPU?

To test I've read use Heaven and see if it passes. What do they mean by passing it? Higher score, no artifacting etc?

Thanks for the swift replies btw.
 
depends really,personally id try and stay below 1.2v,do a few runs of heaven if it doesnt crash then test with some gaming benchmarks, i found stalker call of pripyat a good benchmark,i crashed playing that game yet passed heaven easily,so downclocked the memory slightly and it was fine
 
Speeedy said:
Yeah I understand it depends on what card you get, so basically what voltage would you say is the maximum for 24/7 operation without killing my GPU?

To test I've read use Heaven and see if it passes. What do they mean by passing it? Higher score, no artifacting etc?

Thanks for the swift replies btw.
Click to expand...

I had mine at 1.25V 24\7 and temps never got above 75C, and that was running furmark. In games it hit about 65-70. It runs at a lower voltage in 2D mode so it isn't like it's at the voltage you set 24/7. I now have mine at 1.225 and it seems happy - the coolers on the MSI cards are really good.
 
AlfBaxter said:
My MSI TF IV does 1200/5400 but only with 1.25V and even then it isn't totally stable. It also slows down if I raise the memory above 5400 at that core speed. Like the previous poster said, it depends how good your card is. I now have mine stable at 1150/5400, 1.225V. Can't tell the difference in games, lose about 3% in some benchmarks.
Click to expand...

What's your ASIC quality?
 
You must log in or register to reply here.
Back
Top Bottom