Overclock.net › Forums › Graphics Cards › Graphics Cards - General › general question about graphic cards and OC
New Posts  All Forums:Forum Nav:

general question about graphic cards and OC

post #1 of 6
Thread Starter 
OK, so I'm planning to buy 7970 or 680 but my questions are:
- some guy said "just buy the reference card" , what did he meant by this?
- how do I know if the card is locked?
- some cards have OC in the name, so they are already OverClocked or the are capable of OverClocking
- someone wrote "non-OC generic cards", what he meant? is it good or bed
- do 7970 have to be over 1000Mhz to be better to overclock,

I will play with overclocking, and I will probably add some water blocks.
post #2 of 6
1. By "reference" he meant the original PCB (the board) and the original cooler. I wouldn't go for one of those.
2. Currently the GTX 680s are voltage locked but you can still unlock them with a BIOS flash.
3. Yes, OC means they come with a factory overclock. Most of the time they overclock like any other.
4. Non-OC probably means a low-end card, but nothing you're looking into is low-end.
5. No.
RPI Compy
(14 items)
 
Sister's rig
(11 items)
 
Family HTPC
(10 items)
 
CPUMotherboardGraphicsRAM
5820k MSI X99S MPOWER GTX 980 Ti 8x4gb 3000 MHz Crucial DDR4 
Hard DriveCoolingOSMonitor
Samsung 950 Pro Custom WC loop 480mm & 560mm Windows 10 ROG SWIFT 
KeyboardPowerCaseMouse
CM Quickfire TK Greens Corsair RM1000w Custom 3d-printed case Steelseries Rival 
Mouse PadAudio
CSGO Steelseries Creative Aurvana Live! 2 
CPUMotherboardGraphicsRAM
Amd FX 8320 Asus sabertooth 990FX Nvidia GTX 760 4GB g.skill ares 12GB 
Hard DriveOptical DriveCoolingOS
Samsung 850 EVO 250GB HP thingy Phanteks TC12DX Windows 7 
PowerCaseMouse
Raidmax 530w White FD R4 Logitech G400 
CPUMotherboardGraphicsRAM
AMD A10 5800k Asrock pro-4 m His 6770 1GB G.skill 2133 8GB 
Hard DriveOptical DriveCoolingOS
Samsung 840 ssd 128 GB Lg blu-ray combo drive Cooler Master Hyper 212 EVO Windows 7 
PowerCase
Raidmax 530w Silverstone Temjin 
  hide details  
Reply
RPI Compy
(14 items)
 
Sister's rig
(11 items)
 
Family HTPC
(10 items)
 
CPUMotherboardGraphicsRAM
5820k MSI X99S MPOWER GTX 980 Ti 8x4gb 3000 MHz Crucial DDR4 
Hard DriveCoolingOSMonitor
Samsung 950 Pro Custom WC loop 480mm & 560mm Windows 10 ROG SWIFT 
KeyboardPowerCaseMouse
CM Quickfire TK Greens Corsair RM1000w Custom 3d-printed case Steelseries Rival 
Mouse PadAudio
CSGO Steelseries Creative Aurvana Live! 2 
CPUMotherboardGraphicsRAM
Amd FX 8320 Asus sabertooth 990FX Nvidia GTX 760 4GB g.skill ares 12GB 
Hard DriveOptical DriveCoolingOS
Samsung 850 EVO 250GB HP thingy Phanteks TC12DX Windows 7 
PowerCaseMouse
Raidmax 530w White FD R4 Logitech G400 
CPUMotherboardGraphicsRAM
AMD A10 5800k Asrock pro-4 m His 6770 1GB G.skill 2133 8GB 
Hard DriveOptical DriveCoolingOS
Samsung 840 ssd 128 GB Lg blu-ray combo drive Cooler Master Hyper 212 EVO Windows 7 
PowerCase
Raidmax 530w Silverstone Temjin 
  hide details  
Reply
post #3 of 6
Quote:
Originally Posted by MikeBMW View Post

OK, so I'm planning to buy 7970 or 680 but my questions are:
- some guy said "just buy the reference card" , what did he meant by this?
- how do I know if the card is locked?
- some cards have OC in the name, so they are already OverClocked or the are capable of OverClocking
- someone wrote "non-OC generic cards", what he meant? is it good or bed
- do 7970 have to be over 1000Mhz to be better to overclock,
I will play with overclocking, and I will probably add some water blocks.

1.) By a reference card, he was referring to a card that has a PCB that is unmodified from the OEM version. Meaning the OEM PCB has not been modified.
2.) On the latest generation, locking refers to voltage adjustments. This is based on the manufacturer and does not apply to all cards, some research will be needed to determine which cards are lock and which are not.
3.) Generally speaking OC cards are GPU's that are guaranteed to have a preset value set for whatever parameters the manufacturer sees fit. Sometimes this means the card is a higher binned product, although this is not always the case.
4.) Non overclock cards are just versions that have not been verified at a higher setting. So lets say the overclock version has a setting of 1050 core, 1250 memory. The card has been verified to work at these settings. A non overclock card has to be verified to work at the OEM specifications, which is always less than the OC versions of the same card. Sometimes you can get a non OC version to overclock higher, but its a gamble.
5.) Simply stated no, the "GHZ" is mainly a marketing gimmick. While the cards sold as GHZ editions have to be verified to operate at 1000mhz, it does not always indicate that these chips are superior from the non GHZ edition cards. I believe what may have happened here is that the card manufacturers realized that it was relatively easy to achieve a core speed of 1000mhz , and started selling the cards that could achieve this speed as the GHZ edition to make it seems as if these cards were better than the prior iteration. Whether or not there was any improvement in the manufacturing process is unclear.
post #4 of 6
Reference usually refers to the board itself but is also used to describe the cooler design. Early in a products life span often the stock or reference coolers are the only ones available. Each brand Asus, MSI etc basically just put their sticker on it. Non-reference PCB (board) designs in my experience and from what I've read usually have better power systems and "out of the box" overclocking ranges. They also may not fit water cooling blocks or aftermarket coolers (should the factory fan fail out of warranty) as the GPU core and ram may be located differently.

As Mattb2e said locked refers to voltage controls and can be defeated with a bios flash. You can usually get a pretty good clock before increasing the voltage. And really unless you're running high resolutions of multiple monitors the 7970's and 680's should be more than enough in most cases.

Non-reference coolers are the way to go, they work way better and create less noise.

I have nothing else to add except the name Legonut is awesome, I have the Ferrari F1 beside my desk. thumb.gif
Bessy
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7-950  Gigabyte x58a-ud3r Asus Strix RX480 Kingston Hyper X Fury Black 
Hard DriveHard DriveOptical DriveCooling
Western Digital Caviar Black Sandisk Extreme SSD DVD-RW Fractal Celsius S36 
OSMonitorKeyboardPower
W10 LG 29UM59 Logitech G15 Corsair HX-1000 
Case
Corsair Air 540 
  hide details  
Reply
Bessy
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7-950  Gigabyte x58a-ud3r Asus Strix RX480 Kingston Hyper X Fury Black 
Hard DriveHard DriveOptical DriveCooling
Western Digital Caviar Black Sandisk Extreme SSD DVD-RW Fractal Celsius S36 
OSMonitorKeyboardPower
W10 LG 29UM59 Logitech G15 Corsair HX-1000 
Case
Corsair Air 540 
  hide details  
Reply
post #5 of 6
OP since you mention watercooling and voltage overclocking the reference card is your best option. the reference card has unlocked voltage and the waterblocks are designed for this reference design. there is no way of knowing if a card is voltage locked unless you buy and check it out. but from various HD 7970 users feedback we can make well informed choices. ask this question also in the HD 7900 users thread

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127645
Fragbox
(14 items)
 
  
CPUMotherboardGraphicsGraphics
Intel Core i5 2400 DH67BL AMD Radeon HD 6900 Series XFX HD 6950 2GB 
RAMRAMHard DriveOptical Drive
Corsair Corsair DDR3 1333 Mhz 2 GB Corsair DDR3 1333 Mhz 2 GB Western Digital Caviar Green SONY DVD-RW AD-7260S 
OSMonitorKeyboardPower
Windows 7 Professional 32 bit BENQ G2420HD Logitech K200 Seasonic VX550 psu 
CaseMouse
ANTEC 200 V2 Logitech mouse 
  hide details  
Reply
Fragbox
(14 items)
 
  
CPUMotherboardGraphicsGraphics
Intel Core i5 2400 DH67BL AMD Radeon HD 6900 Series XFX HD 6950 2GB 
RAMRAMHard DriveOptical Drive
Corsair Corsair DDR3 1333 Mhz 2 GB Corsair DDR3 1333 Mhz 2 GB Western Digital Caviar Green SONY DVD-RW AD-7260S 
OSMonitorKeyboardPower
Windows 7 Professional 32 bit BENQ G2420HD Logitech K200 Seasonic VX550 psu 
CaseMouse
ANTEC 200 V2 Logitech mouse 
  hide details  
Reply
post #6 of 6
Thread Starter 
How do I find out if the cards has reference board
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Graphics Cards - General
Overclock.net › Forums › Graphics Cards › Graphics Cards - General › general question about graphic cards and OC