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Anyone use SAPPHIRE Model 100352-3L Radeon 7950? - Page 18

post #171 of 268
Quote:
No VRM Sensor = not to worry about the VRMs

lol... VRMs get hot. I'm using a thermal diode, which isn't as accurate as a VRM sensor and will underreport temps, but it's still highly accurate and just on stock settings I'm getting over 80*C easily. I'm probably hitting the 90s at night (I suspect this because the GPU hits up to 77*C while usually runs at 74-75).

In my experience, GPU VRMs always run hotter than the core itself. Budget mobo VRMs run hotter than CPUs usually, but with a mobo you can usually fit more phases and you see higher quality phases too. Every 7950 blow-out I've ever heard about was also due to the VRMs.
Quote:
No memmory voltage control = not to play with it, so no danger to damage it

lol.... memory voltage /= VRM. They use different phases. I for one, actually like control over voltages. Also, memory overclocks are worth a good $10+ a month for me, it makes a huge difference in the application I use.
Quote:
Elpida RAM - ok, what's wrong with it? Mine goes to 1650Mhz (6600 efective) stable in Heaven4 and Valley1

Aye, and mine does too. But having golden binned Epida is still significantly slower than the worst Hynix at 1800mhz.
Quote:
With Trixx i can manage the core votage = no problem about that

Yes, a positive to the dual-x.
Quote:
Rattling heatsink - really it is loud and the temperatures for me seems to be high (80 degrees in games with auto fans and overclock 1175/1650/1.275 volts; 77 degrees with custom fan profile)

Does yours rattle too? Is this a sapphire dual-x issue or faulty card issue? I don't want to RMA my card for another shaking card, if this is how all Dual-X are then I'm going to get a different card instead.
Quote:
The card comes with 2 years warranty - so why to worry about anything ? With too few managable options we can't damage the card => if something goes wrong just go for warranty replacement

...not sure if srs or trolling. thinking.gif

Better memory and memory voltage control = better Memory clockspeed, and better Core to Memory ratio = $10+ a month for the application in question that I do. I use my 7950 to make money. There's a very real financial gain here for me that makes buying a quality card worth it.


What about the Sapphire 7950 FLEX? I see it's Hynix and uses a CHiL PWM, so it must have memory voltage... hmm....
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post #172 of 268
I thought all 7950,s had mem voltage control, all I have bought are includeing my vapor-x, and by the way when you said the worst hynx at 1800, I think your over stating that-lol. But yes it does a bit better than eplida, mine go,s too 1500, but nothing to be that bummed about, when talking mem speed.
    
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post #173 of 268
Your elpidas or your hynix go to 1500?

It's totally a bummer, why buy a 7950 with elpida when you can buy one with hynix for the same price, amirite?

The vapor-x, does it have:

* Voltage Control
* Memory Voltage Control (okay you do)
* Elpida or Hynix RAM
* VRM Temp sensor
* 7970 pcb, 7950 pcb, or a custom 7950 pcb?

I mean I might go for the vapor-x instead.

Edit: it appears some vapor-x use Elpidas. Same with the Flex. Ugh, avoid sapphire for 7950 unless you get them super cheap. like i got mine. although id rather get a decent one.
Edited by Belial - 5/14/13 at 12:05am
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post #174 of 268
A friend of mine bought sapphire HD 7950 vapor and yes, vapor has memory voltage control, VRM temp sensor, but the RAM is again Elpida and he cannot overclock it as high , as i can mine (his maximum is 1550, mine - 1650). For the pcb of the both cards (7950 boost 3L and 7950 vapor) we suspect that they are the same (not at 100% of cource, but very close). The difference between mine 7950 Boost and his 7950 Vapor is that the Vapor is with higher asic quality (around 90%, mine is 67%), overclocks the core a little higher than me (his -1200, mine - 1175), vapor's cooling is a little better and most important (for me) he does 1200 core with 1.2 volts, i can't even with 1.3 volts . And so what ?! In valley he makes 90.1 fps / 3769 points (with two 7950 vapor) i make 89.9 / 3763 (cross 7950 Boost). His cards are not silent too. I have another friend, who bought gigabyte's 7950 with the three fans - very good core overclock (around 1250Mhz), very bad memory overclock and very loud fans under full load.

Dual X cooling is rattling. Many people are complaining about this.
post #175 of 268
oh my god you have a tz77xe4. Have you used a gigabyte d3h/d4h/d5h board? I'd love to know how it compares. How hot does the VRM get? How is the ram overclocking (compared to high end boards)? Maybe you dont know because that's the only board you've used, but i'd love to hear someone speak of the tz77xe4 vs ud3h who's used both.... or maybe if you've used another z77?
Quote:
, but the RAM is again Elpida and he cannot overclock it as high , as i can mine (his maximum is 1550, mine - 1650)

Wait... what? Your Sapphire Boost Dual-X has Hynix? I'm confused on this. I can hit 1649mhz on my Elpidas, but I'm pretty sure that just means they are golden chips and that's a really good mem clock for elpida. Do you have the 3L boost or 2L boost?

What's your model number? Like mine was 21G, I think most people have the 20G though... i think.
Quote:
Dual X cooling is rattling. Many people are complaining about this.

I'm starting to think my card wasn't faulty and it's just the dual-x. Oh well, already sent in! Hitting it with a hammer a few times actually made it significantly quieter, but it still rattled on certain fan speeds. Maybe next card is just binned better, i could hvae lived with the rattling if it was binned well biggrin.gif
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post #176 of 268
I haven't removed the cooling yet to see the ram chips, but i have read that on 3L cards ram chips are elpida. So they shouldn't be Hynix. Mine goes to 1650 stable in Heaven and Valley. In games i keep it at 1500Mhz. Mine card is exactly this
post #177 of 268
I'm a user of this model. Used Sapphire Trixx to overclock:

GPU Clock: 1065 Mhz (Was able to go to 1250 Mhz, which itself is stable with most of the games I play, but OCCT insists that there are errors mad.gif)
Memory Clock: 1650 Mhz
VDDC: 1.274v (GPU-Z reports 1.244v)
Board Power Li: +20

OCCT reports no errors on current settings but that was done only within one hour.

So the question is, how long do I actually run the OCCT "burn"?
post #178 of 268
Quote:
OCCT reports no errors on current settings but that was done only within one hour.

blinksmiley.gif

I'm pretty sure you only run GPU stress tests for like 5 minutes. I do 6 because I'm crazy. That's how I've understood it. I'm also the guy who runs p95 for about 50 hours checking for whea errors when testing cpu and ram stability.

Error check is better for stress testing, it'll catch errors that might be too small or quick for the eye to notice, the non-error check burn test is just for heat testing but error check will get hot too, just might take a minute is all.
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post #179 of 268
Quote:
Originally Posted by Belial View Post

blinksmiley.gif

I'm pretty sure you only run GPU stress tests for like 5 minutes. I do 6 because I'm crazy.

What do you mean by 6? hours or minutes?

I just increased the GPU Clock to 1070 and I got 1 error after yet another 59 minute stress test of OCCT. axesmiley.png wow
post #180 of 268
6 minutes...
Quote:
I just increased the GPU Clock to 1070 and I got 1 error after yet another 59 minute stress test of OCCT. wow

hmm well i think you are supposed to technically pass infinite amount of time in OCCT, as with any stress test. So I would consider yourself lucky that at least you got an error after 59 minutes, whereas most people would have quit after 5 minutes and then be wondering why they are returning hardware errors or getting driver crashes/artifacts in games, they'd be pulling their hair out trying to see if it was the cpu or ram or something.

Just bump the voltage or drop your gpu clock just a single bit down and you're good.

1070mhz is a super low overclock, that sucks. Did you already raise the voltage to a point where you are like at 75-80*C during stress testing?
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Sanyo DP19640 18.5" 768p KDS Rad-7xp 1024p CM Storm Quickfire Rapids Brown Rosewill Capstone 750 
CaseMouseMouse PadAudio
Bitfenix Shinobi Modded CM Storm Spawn Steelseries Diablo 3 2 set CD Speaker + Big Sub 
Other
Bitfenix Recon Fan Controller Moded 
CPUMotherboardGraphicsRAM
Delidded i7-3770K 5GHz@1.499 Gigabyte Z77X-UD5H 1.1 Sapphire Dual-X 7950 3L Boost 4x2GB Mushkin Ridgeback 2200mhz 8/11/8/27 1.75v... 
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Intel X25-M 80GB SSD NH-D14 SE2011 Noctua 120/140/140 Fans 3 x Yate Loon Mediums (Petras) 2 x NZXT Havik 140mm Fans 
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Hax'd W7 Ultimate 64-bit Sanyo DP19640 19'' KDS Radius Rad-7xp 17'' Ducky 1087 MX Brown 10keyless 
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Rosewill Capstone 550w Modular NZXT Source 210 w/Modded Window Razer Deathadder 3.5G Steelseries Blizzcon D3 
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Phillips FW-C250 2 Speaker Set w/3 CD Changer JBL Sub 6 Subwoofer NZXT Sleeved LED Strip 1m Blue NZXT Sentry 2 Fan Controller 
Other
Colonial Blue Paracord Sleeving 
CPUMotherboardGraphicsRAM
Phenom ii X4 955C2, $31, 5 broken pins, works! ... Biostar A770e3 6.3 Red&Black MSI GTX 460 768mb Twin Frozr II 2 x 2GB Kingston HyperX 1333 OC to 1348CL7@1.65v 
Hard DriveCoolingCoolingCooling
Intel X25-M G2 80GB SSD NH-D14 SE2011 6 x Case Fans (4 x YL-M, NZXT case fan, CM Hype... Jerryrigged Chipset-Northbridge 80mm HSF 
CoolingOSMonitorKeyboard
Jerryrigged VRM Heatsink (sawed off stock AM2 h... Hax'd W7 Ultimate 64bit Sanyo DP19640 19"1360x768 Ducky Cherry Browns 10keyless 
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