Sapphire pulse rx 7900 gre memory overclock

[Basheer]

Hi, I tried to overclock my rx 7900 gre memory but I had many crash, but the frequency was not so exsecive i tried to put 2500mhz (20gbps) like the specified speed of the memory chip in my gpu. Is there something I forgot like my memory controller can't handle or other things.

 

[BlaezaLite]

Hi, I tried to overclock my rx 7900 gre memory but I had many crash, but the frequency was not so exsecive i tried to put 2500mhz (20gbps) like the specified speed of the memory chip in my gpu. Is there something I forgot like my memory controller can't handle or other things.

Have you tried just little step like 10MHz at a time? My GRE Red Devil won't go past 2280MHz.

 

[eidairaman1]

Whats the reason you are pushing the ram?

 

[oxrufiioxo]

Whats the reason you are pushing the ram?

If you get lucky and get a decent overclock on the ram it'll jump performance 10-15% on that card because it's heavily memory bottlenecked is my guess

 

[Zach_01]

Can you check the memory voltage on idle and under load?
You can run a windowed (smaller than your current display res) benchmark like Superposition

 

[eidairaman1]

Hi, I tried to overclock my rx 7900 gre memory but I had many crash, but the frequency was not so exsecive i tried to put 2500mhz (20gbps) like the specified speed of the memory chip in my gpu. Is there something I forgot like my memory controller can't handle or other things.

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AMD RX 7000 series GPU Owners' Club

Okay guys, gonna start a similar thread to the RX 6000 owners' club. Pretty sure I ain't the first here, not even with an AIB card. I did say that when I do get an RX 7900 card, it'd be from Sapphire, PowerColor, XFX and perhaps ASRock. So, here it is, an XFX MERC 310 RX 7900 XTX. Pardon the...

www.techpowerup.com

 

[BlaezaLite]

Can you check the memory voltage on idle and under load?
You can run a windowed (smaller than your current display res) benchmark like Superposition

View attachment 359526

View attachment 359527

This is mine. Look normal?

 

[Zach_01]

This is mine. Look normal?
View attachment 359551View attachment 359551

From what I'm seeing memory voltages are exactly the same with my XTX.
VDDIO (1.25~1.35V) and VDDCI_MEM (0.677~0.805V)

Don't know... if they cant do 2500+MHz maybe they are lower binned chips.
BTW the chips are Samsung on the Nitro+ I have.

 

[BlaezaLite]

From what I'm seeing memory voltages are exactly the same with my XTX.
VDDIO (1.25~1.35V) and VDDCI_MEM (0.677~0.805V)

Don't know... if they cant do 2500+MHz maybe they are lower binned chips.
BTW the chips are Samsung on the Nitro+ I have.

Hmmm, where can I find out what chips are on mine? Without taking it apart!

 

[Zach_01]

GPU-Z (memory type) above memory size

 

[BlaezaLite]

GPU-Z (memory type) above memory size

Samsung. Is that good?

 

[Zach_01]

Samsung. Is that good?

Potentially... you never know.
And even if my 7900XTX and your 7900GRE have exactly the same VRAM chips you never know what(if) hard cap PowerColor has put in there.
If you can't go above a certain speed just live with it and dont try anything foolish like flashing the VBIOS to higher speeds.
99% of times = broken card

If anyone wants faster GPU, have to buy a higher tier one.
Sad but true...

 

[BlaezaLite]

Potentially... you never know.
And even if my 7900XTX and your 7900GRE have exactly the same VRAM chips you never know what(if) hard cap PowerColor has put in there.
If you can't go above a certain speed just live with it and dont try anything foolish like flashing the VBIOS to higher speeds.
99% of times = broken card

If anyone wants faster GPU, have to buy a higher tier one.
Sad but true...

But flashing is the only answer!!!!! Must have more MHz... j/k

I'm on the AFMF2 adrenaline now, so I'm going to try again with ocing the vram, 1 mhz at a time. See where I get to.

 

[Basheer]

Can you check the memory voltage on idle and under load?
You can run a windowed (smaller than your current display res) benchmark like Superposition

View attachment 359526

View attachment 359527

When i oc my vram at 2400 mhz I'm around 1.35v with superposition benchmark,is that good?

Have you tried just little step like 10MHz at a time? My GRE Red Devil won't go past 2280MHz.

For me the max is around 2400mhz

 

[BlaezaLite]

When i oc my vram at 2400 mhz I'm around 1.35v with superposition benchmark,is that good?


For me the max is around 2400mhz

2400!!!!! I've just got mine to 2306 and things started getting weird. Changed the vram timing to fast and screen went blank then came back on.

 

[Zach_01]

2400!!!!! I've just got mine to 2306 and things started getting weird. Changed the vram timing to fast and screen went blank then came back on.

When i oc my vram at 2400 mhz I'm around 1.35v with superposition benchmark,is that good?


For me the max is around 2400mhz

It seems that 1.35V is pretty much standard for GDDR6 no matter the quality or the speed capability of chips.
How much speed they can run I guess depends on other factors.
As I already said, dont try to flash VBIOS to make anything run faster. It doesn't work on most cases and its causing issues.

Changed the vram timing to fast and screen went blank then came back on.

AFAIK faster timings do not benefit games but other type of computations like mining for example.
And may cause instability on games.

 

[Basheer]

It seems that 1.35V is pretty much standard for GDDR6 no matter the quality or the speed capability of chips.
How much speed they can run I guess depends on other factors.
As I already said, dont try to flash VBIOS to make anything run faster. It doesn't work on most cases and its causing issues.


AFAIK faster timings do not benefit games but other type of computations like mining for example.
And may cause instability on games.

Flashing bios is just for more power limit and thanks for your help.

 

[ViperXZ]

Either these ram chips are “bad” 2500 ones or the controller just can’t handle the full 2500 in this case, my speculation tends way more to the former, controller should be fine. Probably 2500 chips that didn’t make the cut and were down labeled to be used as 2250 MHz chips instead.

 

[eidairaman1]

Either these ram chips are “bad” 2500 ones or the controller just can’t handle the full 2500 in this case, my speculation tends way more to the former, controller should be fine. Probably 2500 chips that didn’t make the cut and were down labeled to be used as 2250 MHz chips instead.

Being marketed as a GRE, probably so...

 

[ViperXZ]

Being marketed as a GRE, probably so...

The funny thing is, shouldn’t they be labeled (physically on the chip) as 2250 chips then instead? But they were labeled still as 2500 MHz chips - nothing makes sense it’s not the first time I think about this, or written about this, can’t figure it out since a long time, it’s a mystery. Maybe it’s the controller after all.

 

[eidairaman1]

The funny thing is, shouldn’t they be labeled (physically on the chip) as 2250 chips then instead? But they were labeled still as 2500 MHz chips - nothing makes sense it’s not the first time I think about this, or written about this, can’t figure it out since a long time, it’s a mystery. Maybe it’s the controller after all.

Yeah thats the mystery of overclocking- box o chocolates, we see top asics not overclockibg worth a hoot and then crummy units that do...

I just think be happy that they have a card all things considered with price gouging from nwo...

 

[sandana]

i might have a solution for people who are having hard time running their cards above 2400mhz

i have powercolor fighter 7900 gre samsung memory.
have been running it 2400mhz ram no problem 980mv . card have zero issues running 2400mhz and lower.
whenever i clock it over 2416 it would just crash immedietly on adrenaline.

but last week i accidently clocked it 2650 mhz on custom overclock profile and launched forza horizon which i run maxed out on 4k screen with ray tracing which almost maxes out card %100 with my 165 hz g7 . it ran and played smootly for hours. it did not make any sense.

than i realized it is not running the vram at higher clock crashing the system to grey screen it is the idle voltage crashing it. it is probably a bios issue. spike from idle clock to 2400+ vram clock crash the system. so my temporary solution which imo is rock solid is to set overlock profile for every game i have in amd adrenaline .
but it is not perfect solution i cant alt tab desktop i have to quit game because it will probably crash on desktop .

forza horizon
forza motorsport
cyberpunk
gta V modified
gow 5
cyberpunk
dirt 5
f1 22
rdr2
ratched clank
god of war

i have tested all for over a week with custom overclock profile for every single one of them all with vram set to 2650 over 40 hours game play!. it takes time to set one by one maybe vram can go even higher but i dont have time to set again.

zero crash zero artifact and games run with at least %5 higher fps than setting it 2400mhz ....

again zero crash like this. you guys can test with your cards. i would suggest not running any browser or video playback programs backround.

 

[Basheer]

i might have a solution for people who are having hard time running their cards above 2400mhz

i have powercolor fighter 7900 gre samsung memory.
have been running it 2400mhz ram no problem 980mv . card have zero issues running 2400mhz and lower.
whenever i clock it over 2416 it would just crash immedietly on adrenaline.

but last week i accidently clocked it 2650 mhz on custom overclock profile and launched forza horizon which i run maxed out on 4k screen with ray tracing which almost maxes out card %100 with my 165 hz g7 . it ran and played smootly for hours. it did not make any sense.

than i realized it is not running the vram at higher clock crashing the system to grey screen it is the idle voltage crashing it. it is probably a bios issue. spike from idle clock to 2400+ vram clock crash the system. so my temporary solution which imo is rock solid is to set overlock profile for every game i have in amd adrenaline .
but it is not perfect solution i cant alt tab desktop i have to quit game because it will probably crash on desktop .

forza horizon
forza motorsport
cyberpunk
gta V modified
gow 5
cyberpunk
dirt 5
f1 22
rdr2
ratched clank
god of war

i have tested all for over a week with custom overclock profile for every single one of them all with vram set to 2650 over 40 hours game play!. it takes time to set one by one maybe vram can go even higher but i dont have time to set again.

zero crash zero artifact and games run with at least %5 higher fps than setting it 2400mhz ....

again zero crash like this. you guys can test with your cards. i would suggest not running any browser or video playback programs backround.

Do you think a report to AMD will be useful to improve stability for clock between ≈ 2400-2650 to they fix this issues because I think can be solve by driver (I will try to clock around the same has you)

 

[sandana]

this score running memory 2600 core 980 mv same setting memory @Default 2250 scores 22000 ... factory default 21000 .... overclocking gain is massive for this card.

 

[fenggehuafashi]

hi guys,

sandana's sloution is right, but I may add one more thing.​

After you custom an overclock profile for every game, and when you open up the game, the vram clock goes up.
when you close the game, the vram clock drops down. This interval can lead to crashes easily.

However, when you connect with two screen, for me It's one 4K screen with HDMI and one 1080P screen with DP.
The VRAM clock will stay at the highest setting value and will not fluctuate, so crash will not appear.

This method only works for VRAM chips that natively supports higher frequencies(2500 ⬆).

My XFX 7900gre phoenix can overclock to 2700 core 2600 VRAM 980mv voltage, and 3Dmark Traditional test scores about 25000.
Of course, it's stable to game with this setting.