http://www.techpowerup.com/reviews/HIS/HD_5850/1.html
The GDDR5 memory chips are made by Samsung and carry the model number K4G10325FE-HC04. They are specified to run at 1250 MHz (5000 MHz GDDR5 effective). Those are the same chips like on the big brother HD 5870 - get ready for some serious overclocking.
The GPU voltage is managed by a Volterra VT1165MF voltage controller which is I2C capable enabling software voltmods.
The overclocks of our card are 835 MHz core (15% overclock) and 1260 MHz Memory (26% overclock). For your reference, the defaults are 725 / 1000 (GPU-Z is showing the wrong values due to a bug which will be fixed in the next version). As a percentage those overclocks are really nice. The maximum core clock of 835 MHz is clear evidence that this GPU ended on a HD 5850 because it could not handle the HD 5870 clock speeds of 850 MHz. The memory chips are exactly the same as on the HD 5870, which results in roughly the same maximum memory clock. In essence you can get a HD 5850 and overclock it to almost HD 5870 performance levels in just a few minutes. I would also like to point out that you can increase the voltage for better GPU overclocking. The default voltage of 1.09 V is quite low and there is plenty temperature headroom as well. So I ran a quick test at 1.30 V GPU and reached a maximum core clock of 1000 MHz.
5850 & Waterblock
Nice post^
Does the VT1165MF need to be cooled?
[SIGPIC][/SIGPIC]Bring... bring the amber lamps.
Dont thinks so.. If you look 5870 cooler it wont cool those chips:
http://www.techpowerup.com/reviews/A...ages/front.jpg
http://www.techpowerup.com/reviews/A...es/cooler3.jpg
Anyone know if the Sapphire 5850 has the same Samsung memory ICs?
The answer to your question is 'yes' - 4 posts above and in the OP. Edit: just realized that you might be looking for clarification between brands. HIS, Sapphire, Asus, do they all have programmable volt-regs & 4.ns samsung 5gpbs ics? So far the answer is yes, since they all appear to be based on Ati's reference designed PCB.
Last edited by jaredpace; 10-02-2009 at 11:04 AM.
[SIGPIC][/SIGPIC]Bring... bring the amber lamps.
I realize that these are all reference cards and are likely to all use the same memory, but there have been exceptions in the past.
I don't see a Sapphire branded 5850 in the OP, and the post above my last is about an HIS card.
Just wondering if anyone had seen under the heatsink of a Sapphire branded 5850 and could confirm with 100% certainty that they also use the 1250MHz rated Samsung ICs.
Yeah i just realized you were talking about brands. I would say yes, but to be safe maybe we can wait for someone with a sapphire 5850 to tell us
[SIGPIC][/SIGPIC]Bring... bring the amber lamps.
this seems to work xD
http://gpuz.techpowerup.com/09/10/02/g3x.png
http://gpuz.techpowerup.com/09/10/02/59.png
1. ASUS Sabertooth 990fx | FX 8320 || 2. DFI DK 790FXB-M3H5 | X4 810
8GB Samsung 30nm DDR3-2000 9-10-10-28 || 4GB PSC DDR3-1333 6-7-6-21
Corsair TX750W | Sapphire 6970 2GB || BeQuiet PurePower 450w | HD 4850
EK Supreme | AC aquagratix | Laing Pro | MoRa 2 || Aircooled
4670k 4.6ghz 1.22v watercooled CPU/GPU - Asus Z87-A - 290 1155mhz/1250mhz - Kingston Hyper Blu 8gb -crucial 128gb ssd - EyeFunity 5040x1050 120hz - CM atcs840 - Corsair 750w -sennheiser hd600 headphones - Asus essence stx - G400 and steelseries 6v2 -windows 8 Pro 64bit Best OS used - - 9500p 3dmark11 (one of the 26% that isnt confused on xtreme forums)
Last edited by Chickenfeed; 10-02-2009 at 12:31 PM.
Feedanator 7.0
CASE:R5|PSU:850G2|CPU:i7 6850K|MB:x99 Ultra|RAM:8x4 2666|GPU:980TI|SSD:BPX256/Evo500|SOUND:2i4/HS8
LCD:XB271HU|OS:Win10|INPUT:G900/K70 |HS/F:H115i
ATI power play working
Voltages working
Crossfire working
all done with this nice little MSI overclocking tool from the same maker of Rivatuner
to remove the GPU clocks limit you must flash the new released asus 1200/1400 bios.
Intel I7 3.5ghz 4770k @4.5Ghz 1.285v HT-Enabled | Gigabyte OC z87 DDR3 | 2x8 Avx 2133 C9 @2400 C10 1.64v | PC-Power & Cooling 950w MKII Single Rail Monster | Creative ZXR Sound Card | 24" NeC MultiSync 24WMGX3 1920x1200 60hz | Sennhizer HD650 Headset | Various HDDs 5+ Terabyte | Noctua D14 Heatsink Push/Pull Config | 2x His 7950`s X-Fire @1120/1450 *Stock Cooling* | LG Bluray Drive/Writer |
how high vgpu can u use for 24/7 ? my maxtemp with 1.225v and 1000core is 55c.
your gpu & pwm has a thing called OCP that will shut your board down if you over heat it or overflow it with too much voltage Even so, i would stay under 1.30v - since that's the highest I've heard mentioned so far. Pretty soon someone will figure out the exact amount where over-volt protection and over-current protection initialize. Virus2k, a link to that asus 1200/1400 bios??
[SIGPIC][/SIGPIC]Bring... bring the amber lamps.
so that means I cant damage the card because of too high volt?
I think it is this bios ?
http://techpowerup.com/vgabios/56695...24.090915.html
Last edited by wekktor; 10-02-2009 at 01:47 PM.
You can always damage your card, keep it reasonable, or read up on some of those support threads. Virus2k, that OC is really nice! :0
[SIGPIC][/SIGPIC]Bring... bring the amber lamps.
Hang on, how are you overclocking those Sapphire cards over the 900 core limit and CCC is showing 1200 core and 1400 mem limits
EDIT; okay see you have flashed to the Asus bios. Where is this bios available, is it the same one from techpowerup? also what program and paramaters are people using to flash the 5870, thanks.
Last edited by lowdog; 10-02-2009 at 03:43 PM.
if you flash your bios to asus then it will be 1200/1400 limit. You can overclock in AMD GPU Clock Tool over yours limit(900) with your bios and then change the fanspeed and voltage in MSI AfterBurner but then the 2d clock doesnt work, but if u just want to benchmark or if you dont care about 2d clock mode then u can clock in amd gpu tool
curious which flashtool (atiflash doesnt work) too and which bios exactly.. the above posted?
1. ASUS Sabertooth 990fx | FX 8320 || 2. DFI DK 790FXB-M3H5 | X4 810
8GB Samsung 30nm DDR3-2000 9-10-10-28 || 4GB PSC DDR3-1333 6-7-6-21
Corsair TX750W | Sapphire 6970 2GB || BeQuiet PurePower 450w | HD 4850
EK Supreme | AC aquagratix | Laing Pro | MoRa 2 || Aircooled
ahhh atiflash 3.75 with -fs command does the job
1. ASUS Sabertooth 990fx | FX 8320 || 2. DFI DK 790FXB-M3H5 | X4 810
8GB Samsung 30nm DDR3-2000 9-10-10-28 || 4GB PSC DDR3-1333 6-7-6-21
Corsair TX750W | Sapphire 6970 2GB || BeQuiet PurePower 450w | HD 4850
EK Supreme | AC aquagratix | Laing Pro | MoRa 2 || Aircooled
Last edited by Oese; 10-03-2009 at 05:44 AM.
1. ASUS Sabertooth 990fx | FX 8320 || 2. DFI DK 790FXB-M3H5 | X4 810
8GB Samsung 30nm DDR3-2000 9-10-10-28 || 4GB PSC DDR3-1333 6-7-6-21
Corsair TX750W | Sapphire 6970 2GB || BeQuiet PurePower 450w | HD 4850
EK Supreme | AC aquagratix | Laing Pro | MoRa 2 || Aircooled
btw how hot do your vrm get under load? using gpu-z for readout?
1. ASUS Sabertooth 990fx | FX 8320 || 2. DFI DK 790FXB-M3H5 | X4 810
8GB Samsung 30nm DDR3-2000 9-10-10-28 || 4GB PSC DDR3-1333 6-7-6-21
Corsair TX750W | Sapphire 6970 2GB || BeQuiet PurePower 450w | HD 4850
EK Supreme | AC aquagratix | Laing Pro | MoRa 2 || Aircooled
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