In the second of our RX 7800 XT accomplice card opinions, immediately our consideration turns to Gigabyte and the Gaming OC mannequin. Boasting probably the most aggressive manufacturing unit overclock we’ve got seen up to now, with a 2565MHz increase, the Gaming OC additionally includes a hefty triple-fan cooler, dual-BIOS and a smattering of RGB lighting. Hitting the market at £529, let’s examine what this card can do.
We had been extremely impressed with the PowerColour RX 7800 XT Hellhound that we reviewed only a few days in the past, however the Gigabyte RX 7800 XT Gaming OC seems prefer it may very well be a possible rival. It sports activities the very best out of the field clock velocity of any Navi 32-based graphics card to move via our doorways, and it is not small both, with a big heatsink and triple-fan Windforce cooling setup. We have a look at thermal efficiency, noise ranges, sport benchmarks, overclocking and extra on this evaluation.
| RX 7900 XT | RX 7800 XT | RX 7700 XT | RX 6800 XT | RX 6800 | RX 6700 XT | |
| Architecture | RDNA 3 | RDNA 3 | RDNA 3 | RDNA 2 | RDNA 2 | RDNA 2 |
| Manufacturing Process | 5nm GCD + 6nm MCD | 5nm GCD + 6nm MCD | 5nm GCD + 6nm MCD | 7nm | 7nm | 7nm |
| Transistor Count | 57.7 billion | 28.1 billion | 28.1 billion | 26.8 billion | 26.8 billion | 17.2 billion |
| Die Size | 300 mm² GCD 220 mm² MCD | 200 mm² GCD 150 mm² MCD | 200 mm² GCD 150 mm² MCD | 519 mm² | 519 mm² | 336 mm² |
| Compute Units | 84 | 60 | 54 | 72 | 60 | 40 |
| Ray Accelerators | 84 | 60 | 54 | 72 | 60 | 40 |
| Stream Processors | 5376 | 3840 | 3456 | 4608 | 3840 | 2560 |
| Game GPU Clock | Up to 2000 MHz | 2124 MHz | 2171 MHz | Up to 2015MHz | Up to 1815MHz | Up to 2424MHz |
| Boost GPU Clock | Up to 2400 MHz | Up to 2430 MHz | Up to 2544 MHz | Up to 2250MHz | Up to 2105MHz | Up to 2581MHz |
| ROPs | 192 | 96 | 96 | 128 | 96 | 64 |
| AMD Infinity Cache | 80MB | 64MB | 48MB | 128MB | 128MB | 96MB |
| Memory | 20GB GDDR6 20Gbps | 16GB GDDR6 19.5 Gbps | 12GB GDDR6 18Gbps | 16GB GDDR6 16Gbps | 16GB GDDR6 16Gbps | 12GB GDDR6 16Gbps |
| Memory Bandwidth | 800 GB/s | 624 GB/s | 432 GB/s | 512 GB/s | 512 GB/s | 384 GB/s |
| Memory Interface | 320-bit | 256-bit | 192-bit | 256-bit | 256-bit | 192-bit |
| Board Power | 315W | 263W | 245W | 300W | 250W | 230W |
First, let’s take a fast have a look at the specs. Unlike the newest RDNA 3 GPU – the RX 7600 – AMD has made a return to its chiplet-based design for the RX 7800 XT, as we initially noticed final 12 months with the RX 7900 XTX and 7900 XT. This time round, the 7800 XT presents a 200mm² Graphics Compute Die (GCD) utilizing TSMC’s 5nm course of, flanked by 4 150 mm² Memory Compute Dies (MCDs) constructed on TSMC’s 6nm node.
Internally although, the compute make-up hasn’t been radically modified. Navi 32 packs in 60 Compute Units, every of which homes 64 Stream Processors, for a complete of 3840 shaders. There are additionally 60 Ray Accelerators – one per CU – and 96 ROPs.
As for clock velocity, this stays excessive with the RX 7800 XT, with AMD touting a reference increase of as much as 2430MHz. Gigabyte has elevated this additional, to 2565MHz, no matter which BIOS is used.
Meanwhile, the reminiscence configuration is sort of similar to the earlier technology RX 6800 XT. We nonetheless discover 16GB GDDR6 working over a 256-bit interface, however this time the reminiscence clocks in at 19.5Gbps, up from 16Gbps. This offers a reminiscence bandwidth of 624 GB/s, although AMD claims an ‘efficient’ bandwidth of 2708.4 GB/s because of the 64MB of 2nd Gen Infinity cache.
Power draw for the RX 7800 XT is rated at 263W Total Board Power (TBP), although Gigabyte has elevated this for each BIOS. We are utilizing our well-established GPU energy testing methodology on this evaluation, so learn on for our most detailed energy and effectivity testing but.
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